OA16234A - Methods of administering pirfenidone therapy. - Google Patents
Methods of administering pirfenidone therapy. Download PDFInfo
- Publication number
- OA16234A OA16234A OA1201200247 OA16234A OA 16234 A OA16234 A OA 16234A OA 1201200247 OA1201200247 OA 1201200247 OA 16234 A OA16234 A OA 16234A
- Authority
- OA
- OAPI
- Prior art keywords
- pirfenidone
- cyp1a2
- patient
- day
- inhibitor
- Prior art date
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Abstract
The present invention relates to methods involving avoiding adverse drug interactions with fluvoxamine and pirfenidone or other moderate to strong inhibitors of CYP enzymes.
Description
METHODS OF ADMINISTERING PIRFENIDONE THERAPY
FIELD OF THE INVENTION
The invention relates to improved methods of administering pirfenidone therapy involving avoiding adverse drug interactions with fluvoxamine, a strong inhibitor of CYP1A2.
BACKGROUND
Pirfenidone is small molécule with a molecular weight of 185.23 daltons whose chemical name is 5-methyl-1-phenyl-2-(1H)-pyridone. Pirfenidone has anti-fibrotic properties and has been investigated for therapeutic benefits to patients suffering from various fibrotic conditions. It is approved in Japan for treatment of idiopathic pulmonary fibrosis (IPF) under the trade name Pirespa®.
Pirfenidone has been shown to be metabolized by various isoforms of the cytochrome P450 (CYP) protein [See the Report on the Deliberation Results, Evaluation and Licensing Division, Pharmaceutical and Food Safety Bureau, Ministry of Health Labour and Welfare, September 16, 2008], Specifically, several cytochrome P450 (CYP) isoforms (CYP1A2, 2C9, 2C19, 2D6 and 2E1) were involved in the earliest stages of oxidative metabolism of pirfenidone.
Fluvoxamine belongs to a class of therapeutics known as sélective serotonin reuptake inhibitors (SSRls). The SSRIs are a group of antidepressants with similar pharmacologie effects, but with different chemical structures, Fluvoxamine has been approved for treatment of social anxiety disorder (social phobia), obsessive compulsive disorder (OCD), and has been prescribed to treat major dépréssion, and other anxiety disorders such as panic disorder and post-traumatic stress disorder [McClellan et al., (Drugs October 2000). Fluvoxamine An Updated Review of its Use in the Management of Adults with Anxiety Disorders. Adis Drug Evaluation 60 (4): 925-954]. In addition to fluvoxamine, other clinically available SSRls are citalopram, fluoxetine, paroxetine and sertraline. The élimination of these lipophilie compounds proceeds predominantly via oxidation catalysed by CYP in the liver. SSRls hâve the potential for inhibition of CYP enzymes [Brosen, The pharmacogenetics of the sélective serotonin reuptake inhibitors. Clin Invest 71(12): 10021009, 1993], Jeppesen et al. reported that fluvoxamine is a potent inhibitor of CYP1A2 in humans in vivo [Jeppesen et al., Dose-dependent inhibition of CYP1A2, CYP2C19 and CYP2D6 by citalopram, fluoxetine, fluvoxamine and paroxetine. Eur J Clin Pharmacol 51: 73-78, 1996]. Fluvoxamine has also been shown to be a very potent inhibitor of CYP1A2 in vitro [Brosen et al., Fluvoxamine is a potent inhîbitor of cytochrome P4501A2. Biochem Pharmacol 45:1211-1214, 1993; Rasmussen et al., Sélective serotonin reuptake inhibitors and theophylline metabolism in human liver microsomes: potent inhibition by fluvoxamine. Br J Clin Pharmacol 39:151-159,1995].
SUMMARY OF THE INVENTION
The invention disclosed herein is based on the discovery of an adverse drug interaction between pirfenidone and fluvoxamine.
The invention generally relates to improved uses and methods of administering pirfenidone to a patient in need of pirfenidone therapy, and to methods of preparing or packaging pirfenidone médicaments, containers, packages and kits. In any of the aspects or embodiments, the patient may hâve idiopathic pulmonary fibrosis (IPF) and the médicament is for treatment of IPF. In any of the aspects or embodiments, the therapeutically effective amount of pirfenidone being administered may be a daily dosage of 2400 mg or 2403 mg per day. In any of the aspects of the invention, the daily dosage may be administered in divided doses three fîmes a day, or two fîmes a day, or alternative^ is administered in a single dose once a day. In any of the aspects of the invention, the pirfenidone may be administered with food. For example, the daily dosage of 2400 mg or 2403 mg pirfenidone per day may be administered as follows: 801 mg taken three times a day, with food.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy {e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and avoiding administration of fluvoxamine despite the patient being in need of fluvoxamine therapy.
In other aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of fluvoxamine to avoid an adverse drug interaction and administering a therapeutically effective amount of pirfenidone. In one embodiment, the patient is in need of and thus is receiving fluvoxamine, and fluvoxamine is discontinued concurrent with starting administration of pirfenidone. In another embodiment, fluvoxamine is discontinued within at least 3 days to 1 month prior to or after starting pirfenidone therapy. This time period, for example, permits adéquate time for tapering and withdrawal without adverse effects. In one example, in a method of administering a therapeutically effective amount of pirfenidone to a patient with IPF, the invention provides an improvement that comprises avoiding or discontinuing administration of fluvoxamine and administering a therapeutically effective amount of pirfenidone.
716234
As used herein, an adverse drug interaction can include reduced clearance of pirfenidone, the potential for reduced clearance of pirfenidone, increased exposure to pirfenidone, or the potential for increased exposure to pirfenidone.
Thus, an aspect of the invention provides pirfenidone for use in treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use (or co-administration) of fluvoxamine. In some embodiments, the concomitant use of fluvoxamine is avoided, contraindicated or discontinued, in order to avoid reduced clearance of pirfenidone, or the potential for reduced clearance of pirfenidone. In some embodiments, the concomitant use of fluvoxamine is avoided, contraindicated or discontinued, in order to avoid increased exposure to pirfenidone, or the potential for increased exposure to pirfenidone. Administration of pirfenidone in patients that concomitantly use or are being administered fluvoxamine results in about a 6-fold increase in pirfenidone exposure. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment apply to this aspect of the invention that provides pirfenidone for use in treating a patient. For example, the patient may be a patient with IPF, and the therapeutically effective amount administered may be 2400 or 2403 mg per day,
Similarly, a further aspect of the invention provides the use of pirfenidone in the manufacture of a médicament for treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use (or coadministration) of fluvoxamine. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment or “pirfenidone for use” in treating a patient apply to this aspect of the invention that provides for the use of pirfenidone in manufacture of a médicament. For example, the patient may be a patient with IPF, and the therapeutically effective amount administered may be 2400 or 2403 mg per day.
As used herein, concomitant use is understood to be interchangeable with concurrent administration or co-administration. Thus, the terms are understood to encompass administration simultaneously, or at different times, and by the same route or by different routes, as long as the two agents are given in a manner that allows both agents to be affecting the body at the same time. For example, concomitant use can refer to a médication concomitantly administered, whether prescribed by the same or a different practitioner, or for the same or a different indication.
In some embodiments, the patient is a patient in need of therapy with a CYP1A2 inhibitor. In some embodiments, the patient is a patient in need of therapy with a strong CYP1A2 inhibitor, or a moderate to strong CYP1A2 inhibitor. In some embodiments, the patient is a patient in need of fluvoxamine therapy. In some embodiments, the patient is a patient who is avoiding concomitant use of fluvoxamine, e.g. because concomitant use of pirfenidone with fiuvoxamine is contraindicated. In some embodiments, the patient is a patient who was or is being administered a strong CYP1A2 inhibitor, or a moderate to strong CYP1A2 inhibitor, e.g. fiuvoxamine. In some embodiments, the patient is a patient who has discontinued use of a strong CYP1A2 inhibitor, or a moderate to strong CYP1A2 inhibitor prior to the initiation of pirfenidone therapy in order to avoid reduced clearance (or increased exposure to) pirfenidone, or the potentîal for reduced clearance of (or increased exposure to) pirfenidone. In some embodiments, the patient is a patient who has discontinued use of fiuvoxamine prior to the initiation of pirfenidone therapy in order to avoid reduced clearance of pirfenidone, or the potential for reduced clearance of pirfenidone. In some embodiments, the patient is a patient who has discontinued use of fiuvoxamine prior to the initiation of pirfenidone therapy in order to avoid increased exposure to pirfenidone, or the potential for increased exposure to pirfenidone. In some embodiments, the patient is a patient who has discontinued administration of the strong CYP1A2 inhibitor, or moderate to strong CYP1A2 inhibitor, e.g., fiuvoxamine, within 1 month, or within 2 weeks, prior to starting pirfenidone therapy, or concurrent with starting pirfenidone therapy. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment apply to this aspect of the invention that provides for characterization of the patients to be treated with pirfenidone.
In yet other aspects, a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of fiuvoxamine therapy is provided, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not fiuvoxamine. In one aspect, the alternative therapy that is not fiuvoxamine is a drug that is not a strong or moderate to strong inhibitor of cytochrome P450 1A2 (CYP1A2). Preferably, such drug is not a moderate to strong inhibitor of both CYP1A2, and another CYP enzyme selected from the group consîsting of CYP3A4, CYP2C9, and/or CYP2C19. In some examples, the alternative drug is selected from the group consîsting of Citalopram (Celexa), Escitalopram (Lexapro), Fluoxetine (Prozac, Prozac Weekly), Paroxetine (Paxil, Paxil CR, Pexeva), and/or Sertraline (Zoloft).
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy (e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and advising the patient in any one, two, three or more of the following ways:
advising the patient that fiuvoxamine should be avoided or discontinued, advising the patient that co-administration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consîsting of CYP3A4, CYP2C9, and/or CYP2C19. , can alter the therapeutic effect or adverse reaction profile of pirfenidone, advising the patient that co-administration of pirfenidone with fluvoxamine can alter the therapeutîc effect or adverse réaction profile of pirfenidone, advising the patient that use of pirfenidone in patients being treated with fluvoxamine is contraindicated, advising the patient that co-administration of pirfenidone and fluvoxamine resulted in an average 6-fold increase in exposure to pirfenidone, and/or.
advising the patient that strong CYP1A2 inhibitors should be used with caution in patients receiving pirfenidone due to the potentîal for reduced pirfenidone clearance.
In some embodiments, the method further includes advising the patient that coadministration of pirfenidone and fluvoxamine resulted in a 2-fold increase in average peak sérum concentration of pirfenidone (Cmax). In yet further embodiments, the method also includes avoiding administering a strong CYP1A2 inhibitor, or discontinuing administration of a strong CYP1A2 inhibitor.
In some embodiments, a method of reducing toxicity of pirfenidone treatment in a patient is provided comprising administering a therapeutically effective amount of pirfenidone to the patient and advising the patient of any of the foregoing advice.
In some embodiments, a method of improving safety of pirfenidone treatment in a patient is provided comprising administering a therapeutically effective amount of pirfenidone to the patient and advising the patient of any of the foregoing advice.
In some embodiments, a method of reducing adverse drug interaction with pirfenidone treatment in a patient is provided comprising administering a therapeutically effective amount of pirfenidone to the patient and advising the patient of any of the foregoing advice.
Thus, in some embodiments, the concomitant use of fluvoxamine is avoided, contraindicated or discontinued in order to:
avoîd altering the therapeutîc effect profile of pirfenidone, and/or avoid altering the adverse reaction profile of pirfenidone, and/or avoid the increased exposure or potentîal for increased exposure, and/or avoid the reduced clearance or potentîal for reduced clearance, and/or avoid the average 6-fold increase in exposure to pirfenidone upon concomitant administration with fluvoxamine, and/or avoid the average 2-fold increase in average peak sérum concentration of pirfenidone (Cmax) upon concomitant administration with fluvoxamine, and/or reduce toxicity of pirfenidone treatment, and/or improve safety of pirfenidone treatment, and/or reduce adverse drug interaction associated with pirfenidone treatment.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 depicts a symmetrical dot plot of AUC0.- estimâtes by study day—circles indicate smokers, triangles indicate nonsmokers.
DETAILED DESCRIPTION OF THE INVENTION
Pirfenidone is an orally active, anti-fibrotic agent. Résulte of in vitro experiments indicated that pirfenidone is primarily metabolized by CYP1A2 (approx, 48%) with multiple other CYPs contributing as well (each <13%) (/,e., 1A1, 2A6, 2B6, 2C8, 2C9, 2C18, 2C19, 2D6, 2E1, 2J2, 3A4, 3A5, 4A11, and 4F2), Oral administration of pirfenidone results in the formation of four métabolites, 5 hydroxymethyl-pirfenidone, 5 carboxy-pirfenidone, 4’-hydroxypirfenidone, and the 5 O-acyl glucuronide métabolite of 5 carboxy-pirfenidone. In humans, only pirfenidone and 5-carboxy-pirfenidone are présent in plasma in significant quantities; none of the other métabolites occur in sufficient quantities to allow for PK analysis. There are no unique human métabolites.
Fluvoxamine is a potent CYP1A2 and CYP2C19 inhibitor, and a moderate CYP2C9, CYP2D6, and CYP3A4 inhibitor [Hemeryck et al., Sélective Serotonin Reuptake Inhibitors and Cytochrome P-450 Mediated Drug-Drug Interactions: An Update, Current Drug Metabolism 3(1); 13-37, 2002],
The invention disclosed herein is based on the discovery of an adverse drug interaction between pirfenidone and fluvoxamine. Adverse drug interactions represent 3-5% of preventable in-hospital adverse drug reactions, and are an important contributor to the number of emergency room visite and hospital admissions [Leape LL et al., JAMA 1995;274(1):35-43; Raschetti R étal. Eur J Clin Pharmacol 1999;54(12):959-963],
Data reported herein show that co-administration of pirfenidone with fluvoxamine resulted in an average 6-fold increase in exposure (AUC, or area under the curve) to pirfenidone. It also resulted in an average 2-fold increase in Cmax, the mean maximum plasma concentration. Depending on the circumstances, FDA draft guidance suggests that a drugdrug interaction is présent when comparisons indicate twofold or greater systemic exposure for a drug when given in combination with the second drug, compared to when given alone. FDA Preliminary Concept Paper, “Drug Interaction Studies - Study Design, Data Analysis, and Implications for Dosing and Labeling,” October 1, 2004.
Définitions
The terms therapeutically effective amount, as used herein, refer to an amount of a compound sufficient to treat, ameliorate, or prevent the identified disease or condition, or to exhibit a détectable therapeutic, prophylactic, or inhibitory effect. The effect can be detected by, for example, an improvement in clinical condition, or réduction in symptoms. The précisé effective amount for a subject will dépend upon the subject’s body weight, size, and health; the nature and extent of the condition; and the therapeutic or combination of therapeutics selected for administration. Where a drug has been approved by the U.S, Food and Drug Administration (FDA), a “therapeutically effective amount refers to the dosage approved by the FDA or its counterpart foreign agency for treatment of the identified disease or condition.
As used herein, a patient “in need of pirfenidone therapy is a patient who wouid benefit from administration of pirfenidone. The patient may be suffering from any disease or condition for which pirfenidone therapy may be useful in ameliorating symptoms. Such diseases or conditions include pulmonary fibrosis, idiopathic pulmonary fibrosis, idiopathic interstitial pneumonia, autoimmune lung diseases, benign prostate hypertrophy, coronary or myocardial infarction, atrial fibrillation, cérébral infarction, myocardiac fibrosis, musculoskeletal fibrosis, post-surgical adhesions, liver cirrhosis, rénal fibrotic disease, fibrotic vascular disease, scleroderma, Hermansky-Pudlak syndrome, neurofibromatosis, Alzheimer's disease, diabetic retinopathy, and/or skin lésions, lymph node fibrosis associated with HIV, chronic obstructive pulmonary disease (COPD), inflammatory pulmonary fibrosis, rheumatoid arthritis; rheumatoid spondylitis; osteoarthritis; goût, other arthritic conditions; sepsis; septic shock; endotoxic shock; gram-negative sepsis; toxic shock syndrome; myofacial pain syndrome (MPS); Shigellosis; asthma; adult respiratory distress syndrome; inflammatory bowel disease; Crohn's disease; psoriasis; eczema; ulcerative colitis; glomerular nephritis; scleroderma; chronic thyroiditis; Grave's disease; Ormond’s disease; autoimmune gastritis; myasthenia gravis; autoimmune hemolytic anémia; autoimmune neutropenia; thrombocytopenia; pancreatic fibrosis; chronic active hepatitis including hepatic fibrosis; acute and chronic rénal disease; rénal fibrosis; diabetic nephropathy; irritable bowel syndrome; pyresis; restenosis; cérébral malaria; stroke and ischémie injury,; neural trauma; Alzheimer’s disease; Huntington's disease; Parkinson's disease; acute and chronic pain; allergies, including allergie rhinitis and allergie conjunctivitis; cardiac hypertrophy, chronic heart failure; acute coronary syndrome; cachexia; malaria; leprosy; leishmaniasis; Lyme disease; Reiter’s syndrome; acute synoviitis; muscle degeneration, bursitis; tendonitis; tenosynoviitis; herniated, ruptured, or prolapsed intervertébral disk syndrome; osteopetrosis; thrombosis; sîlicosis; pulmonary sarcosis; bone résorption diseases, such as osteoporosis or multiple myeloma-related bone
O disorders; cancer, including but not limited to metastatic breast carcinoma, colorectal carcinoma, malignant melanoma, gastric cancer, and non-small cell lung cancer; graftversus-host reaction; and auto-immune diseases, such as multiple sclerosis, lupus and fibromyalgia; AIDS and other viral diseases such as Herpes Zoster, Herpes Simplex I or II, influenza virus, Severe Acute Respiratory Syndrome (SARS) and cytomégalovirus; and diabètes mellitus. In addition, the methods of the embodiments can be used to treat proliférative disorders (including both benign and malignant hyperplasias), including acute myelogenous leukemia, chronic myelogenous leukemia, Kaposi's sarcoma, metastatic melanoma, multiple myeloma, breast cancer, including metastatic breast carcinoma; colorectal, carcinoma; malignant melanoma; gastric cancer; non-small cell lung cancer (NSCLC); bone métastasés, and the like; pain disorders including neuromuscular pain, headache, cancer pain, dental pain, and arthritis pain; angiogenic disorders including solid tumor angiogenesis, ocular neovascularization, and infantile hemangioma; conditions associated with the cyclooxygenase and lipoxygenase signaling pathways, including conditions associated with prostaglandin endoperoxide synthase-2 (including edema, fever, analgesia, and pain); organ hypoxia; thrombin-induced platelet aggregation; protozoal diseases.
As used herein, a patient in need of fluvoxamine therapy is understood to be a patient in need of sélective serotonin reuptake inhibitor (SSRI) therapy. Such patients include patients suffering from social anxiety disorder (social phobia), obsessive compulsive dîsorder (OCD), dépréssion, anxiety disorders, panic disorder and post-traumatic stress disorder.
For CYP enzymes, the FDA generally defines a strong inhibitor as one that caused a > 5fold increase in the plasma AUC values or more than 80% decrease in clearance of CYP substrates (not limited to sensitive CYP substrate) in clinical évaluations. The FDA generally defines a moderate inhibitor as one that caused a > 2- but < 5-fold increase in the AUC values or 50-80% decrease in clearance of sensitive CYP substrates when the inhibitor was given at the highest approved dose and the shortest dosing interval in clinical évaluations.
CYP inhibitors and substrates
In any of the embodiments described herein, including but not limited to providing pirfenidone for use in treating a patient, the use of pirfenidone in the manufacture of a médicament for treating a patient in need of pirfenidone therapy, and treatment methods involvîng the advice, warnings, discontinuation or dose titration downwards, the packages and kits, and/or the methods of preparing or packaging pirfenidone, the pirfenidone, uses, methods, packages, kits, advice, warnings, discontinuation or dose titration may apply not only to fluvoxamine but also to any other drug that is a moderate to strong inhibitor of both
CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, and/or CYP2C19 (or a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4]), such as fluvoxamine. The embodiments may also apply to any other drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6, and/or CYP2D6. The embodiments may also apply to any other drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme that metabolizes pirfenidone, e.g. selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2.
As yet other alternatives, in any of the embodiments described herein, including but not limited to the pirfenidone for use in treating a patient, the use of pirfenidone in the manufacture of a médicament for treating a patient in need of pirfenidone therapy, and treatment methods involving the advice, warnings, discontinuation or dose titration downwards, the packages and kits, and/or the methods of preparing or packaging pirfenidone, the pirfenidone, uses, methods, packages, kits, advice, warnings, discontinuation or dose titration may apply not only to fluvoxamine but also to any other drug that is a strong inhibitor of CYP1A2 or a substrate for CYP1A2.
CYP1A2 metabolizes many commonly used drugs including theophylline, imipramine, propranolol, and clozapine. These drugs are commonly referred to as substrates for CYP1A2. Additional CYP1A2 substrates include but are not limited to acetominophen, amitriptyline, caffeine, chlordiazepoxide, cinacalcet, clomipramine, clopidogrel, cyclobenzaprine, desipramine, diazepam, duloxetine, erlotinib, estradiol, flutamide, haloperidol, levobupivacaine, methadone, mirtazapine, naproxen, nortriptyline, olanzapine, ondansetron, ramelteon, riluzole, ropinirole, ropivacaine, tacrine, tizanidine, verapamil, and warfarin.
Inhibitors of CYP1A2 include fluvoxamine, cimetidine, amiodarone, echinacea, enoxacin, norfloxacin, oral contraceptives, tacrine, ticlopidine, and many fluoroquinolone antibiotics. Moderate inhibitors of CYP1A2 include ciprofloxacin, mexiletine, propafenone and zileuton. Additional inhibitors of CYP1A2 include atazanavir, citalopram, clarithromycin, dilitiazem, erythromycin, ethinyl estradiol, isoniazid, kétoconazole, methoxsalen, nalidixic acid, norethindrone, omeprazole, paroxetine, tipranavir, and troleandomycin. Other inhibitors of CYP1A2 include acyclovir, caffeine, famotidine, flutamide, grapefruit juice, lidocaine, lomefloxacin, moclobemide, ofloxacin, perphenazine, phenacetin, propafenone, ropinirole, tocainide, and verapamil.
Inhibitors of CYP3A4 include amiodarone, cimetidine, ciprofloxacin, delavirdine, fluvoxamine, miconazole, and voriconazole (VFEND). Strong inhibitors of CYP3A4 include d— atazanavîr, clarithromycin, indinavir, itraconazole, kétoconazole, nefazodone, neliïnavir, ritonavir, saquinavir and telithromycin. Moderate inhibitors of CYP3A4 include amprenavir, aprepitant, diltiazem, erythromycin, fluconazole, fosamprenavir, grapefruit juice and verapamil. Additionaî inhibitors of CYP3A4 include acitretin, cyclosporine, danazol, diethyldithiocarbamate, efavirenz, ethinyl estradiol, fluoxetine, gestodene, imatinib, isoniazid, metronidazole, methylpredisolone, mifepristone, nicardipine, nifedipine, norethindrone, norfloxacin, norfluoxetine, oxiconazole, pomegranate, prednisone, quinine, ranolazine, roxithromycin, sertraline, Synercid, troleandomycin, zafirlukast, and zileuton. Other inhibitors of CYP3A4 include doxycycline, echinacea, and enoxacin.
Inhibitors of CYP2C9 include cimetidine, delavirdine, efavirenz, fenofibrate (Tricor), fluoxetine, fluvastatin, fluvoxamine, isoniazid, kétoconazole, leflunomide, modafinil, sertraline, voriconazole (VFEND), and zafirlukast (Accolate). Moderate inhibitors of CYP2C9 include amiodarone, fluconazole and oxandrolone. Additionaî CYP2C9 inhibitors include atazanavîr, chloramphenicol, clopidogrel, cotrimoxazole, cranberry, disulfiram, fluorouracil, gemfibrozil, ginkgo, imatinib, itraconazole, lovastatin, metronidazole, omeprazole, paroxetine, sulfonamides, tnclopidine, and tipranavir, Other inhibitors of CYP2C9 include anastrazole, phenylbutazone, sulfamethoxazole, sulfaphenazole, tamoxifen, teniposide, valproic acid, and 5-fluorouracil.
Inhibitors of CYP2D6 include amiodarone, bupropion, celecoxib, chlorpheniramine, cimetidine, cinacalcet, citalopram, clomipramine, desipramine, diphenhydramine, halofantrine, haloperidol, methadone, moclobemide, propafenone, ritonavir, sertraline, and thioridazine. Strong CYP2D6 inhibitors include fluoxetine, paroxetine and quinidine, while moderate CYP2D6 inhibitors include duloxetine and terbinafine, Additionaî inhibitors of CYP2D6 include chloroquine, cocaïne, darifenacin, escitalopram, fluphenazine, hydroxychloroquine, imatinib, levomepromazine, norfluoxetine, perphenazine, pomegranate, propoxyphene, propranolol, quinacrine, ranitidine, ranolazine, and tipranavir. Other inhibitors of CYP2D6 include amitriptyline, chlorpromazine, doxepin, fluvoxamine, goldenseal, hydroxyzine, imipramine, metoclopramide, pimozide, and ticlopidine (Ticlid).
Inhibitors of CYP2C19 include delavirdine, efavirenz, esomeprazole, felbamate, fluconazole, fluoxetine, fluvoxamine, indomethacin, isoniazid (INH), modafinil (Provigil), oxcarbazepine, ticlopidine, topiramate, and voriconazole (VFEND) A strong inhibitor of CYP2C19 is omeprazole. Additionaî inhibitors of CYP2C19 include citalopram, fluvastatin, kétoconazole, lansoprazole, letrozole, paroxetine, sertraline, telmisartan, and tipranavir. Other inhibitors of CYP2C19 include artemisinin, chloramphenicol, and oral contraceptives.
Inhibitors of CYP2B6 include clopidogrel (Plavix), efavirenz, fluoxetine, fluvoxamine, kétoconazole, memantine, nelfinavir, oral contraceptives, paroxetine, ritonavir, thiotepa, and ticlopidine (Ticlid).
Avoiding or discontinuing administration of a drug to avoid adverse drug interactions with pirfenidone
As used herein, the term “avoid” and forms thereof are contemplated to hâve as alternatives the terms abstain, desist, forbear, and refrain, and forms thereof. In some cases, the alternative terms will be équivalent. For example, “avoiding” means “refraining from. Merriam-Webster Online Dictionary, 11^ ed., 24 November 2009. As used herein, the term “discontinue and forms thereof are contemplated to hâve as alternatives the terms cease, stop, suspend, and quit. In the methods described herein, the avoiding and/or discontinuing steps can be performed in anticipation of pirfenidone therapy. For example, impending or imminent pirfenidone administration can be the proximate cause of the avoiding and/or discontinuing steps. As another example, concurrent pirfenidone administration can be the proximate cause of discontinuing and/or further avoiding steps.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy {e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and avoiding or contraindicating administration of a CYP1A2 inhibitor. In some embodiments, the CYP1A2 inhibitor is a strong CYP1A2 inhibitor. In some embodiments, the CYP1A2 inhibitor is a moderate to strong CYP1A2 inhibitor. In some embodiments, the CYP1A2 inhibitor is a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 (or a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4J), or a drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6, and/or CYP2D6. In some embodiments, the drug is fluvoxamine.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy {e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and avoiding or contraindicating administration of a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy {e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and avoiding or contraindicating administration of a strong CYP1A2 inhibitor.
Il
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy (e.g., a patient with IPF), involving administering to the patient a therapeutically effective amount of pirfenidone, and avoidîng or contraindicating administration of a CYP1A2 substrate.
In other aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 (or a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4J) to avoid an adverse drug interaction, and administering a therapeutically effective amount of pirfenidone. In some embodiments, the drug being discontinued is a drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6, and/or CYP2D6. In some embodiments, the drug is fluvoxamine.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2 to avoid an adverse drug interaction, and administering a therapeutically effective amount of pirfenidone.
In other aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of a drug that is a strong CYP1A2 inhibitor to avoid an adverse drug interaction, and administering a therapeutically effective amount of pirfenidone. In other aspects, the invention provides a method of administering prifenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of a drug that is a CYP1A2 inhibitor, e.g. a moderate to strong CYP1A2 inhibitor.
In one example, in a method of administering a therapeutically effective amount of pirfenidone to a patient with IPF, the invention provides an improvement that comprises avoidîng, contraindicating or discontinuing administration of the drug that is a CYP inhibitor and administering a therapeutically effective amount of pirfenidone.
In some embodiments, the drug that is a CYP inhibitor is discontinued concurrent with starting administration of pirfenidone. In other embodiments, the drug that is a CYP inhibitor is discontinued within at least 3 days to 1 month prior to or after starting pirfenidone therapy.
This time period, for example, permits adéquate time for tapering and withdrawal without adverse effects.
Thus, an aspect of the invention provides pirfenidone for use in treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use (or co-administration) of a strong CYP1A2 inhibitor; or a moderate to strong CYP1A2 inhibitor; or a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4; or a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4]; or a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2; or fluvoxamine (collectively referred to as “CYP1A2 inhibitors). In some embodiments, the concomitant use of the CYP1A2 inhibitor is avoided, contraindicated or discontinued, in order to avoid reduced clearance of pirfenidone, or the potential for reduced clearance of pirfenidone. In some embodiments, the concomitant use of the CYP1A2 inhibitor is avoided, contraindicated or discontinued, in order to avoid increased exposure to pirfenidone, or the potential for increased exposure to pirfenidone. Administration of pirfenidone in patients that concomitantly use or are being administered fluvoxamine results in about a 6-fold increase in pirfenidone exposure. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment apply to this aspect of the invention that provides pirfenidone for use in treating a patient. For example, the patient may be a patient with IPF, and the therapeutically effective amount administered may be 2400 or 2403 mg per day.
Similarly, a further aspect of the invention provides the use of pirfenidone in the manufacture of a médicament for treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use (or coadministration) of a CYP1A2 inhibitor. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment or “pirfenidone for use” in treating a patient apply to this aspect of the invention that provides for the use of pirfenidone in manufacture of a médicament. For example, the patient may be a patient with IPF, and the therapeutically effective amount administered may be 2400 or 2403 mg per day.
In some embodiments, the patient is a patient in need of therapy with a CYP1A2 inhibitor. In some embodiments, the patient is a patient in need of therapy with a strong CYP1A2 inhibitor. fn some embodiments, the patient is a patient in need of therapy with a moderate to strong CYP1A2 inhibitor. In some embodiments, the patient is a patient in need of 13 therapy with a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4; or a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4], In some embodiments, the patient is a patient in need of fluvoxamine therapy. In some embodiments, the patient is a patient who is avoiding concomitant use of the CYP1A2 inhibitor, e.g. because concomitant use of pirfenidone with the CYP1A2 inhibitor is contraindicated or to be used with caution. In some embodiments, the patient is a patient who was or is being administered the CYP1A2 inhibitor. In some embodiments, the patient is a patient who is discontinuing use of the CYP1A2 inhibitor prior to the initiation of pirfenidone therapy in order to avoid reduced clearance (or increased exposure to) pirfenidone, or the potential for reduced clearance of (or increased exposure to) pirfenidone. In some embodiments, the patient is a patient who is discontinuing administration of the the CYP1A2 inhibitor, within 1 month, or within 2 weeks, prior to starting pirfenidone therapy, or concurrent with starting pirfenidone therapy. It is understood that any of the aspects or embodiments or examples described herein with respect to methods of treatment apply to this aspect of the invention that provides for characterizatîon of the patients to be treated with pirfenidone.
In some embodiments, the concomitant use of the CYP1A2 inhibitor is avoided, contraindicated or discontinued in order to:
avoid altering the therapeutic effect profile of pirfenidone, and/or avoid altering the adverse reaction profile of pirfenidone, and/or avoid the increased exposure or potential for increased exposure, and/or avoid the reduced clearance or potential for reduced clearance, and/or avoid the average 6-fold increase in exposure to pirfenidone upon concomitant administration with fluvoxamine, and/or avoid the average 2-fold increase in average peak sérum concentration of pirfenidone (Cmax) upon concomitant administration with fluvoxamine, and/or reduce toxicity of pirfenidone treatment, and/or improve safety of pirfenidone treatment, and/or reduce adverse drug interaction associated with pirfenidone treatment.
In some embodiments in which fluvoxamine is discontinued to avoid an adverse drug interaction, fluvoxamine is discontinued within at least 3 days prior to or after starting pirfenidone therapy. In various embodiments, fluvoxamine is discontinued within at least 4 days, or at least 5 days, or at least 6 days, or at least 7 days (or one week), or at least 8 days, or at least 9 days, or at least 10 days, or at least 11 days, or at least 12 days, or at least 13 days, or at least 14 days (or two weeks), or at least 15 days, or at least 16 days, or at least 17 days, or at least 18 days, or at least 19 days, or at least 20 days, or at least 21 days (or three weeks), or at least 22 days, or at least 23 days, or at least 24 days, or at least 25 days, or at least 26 days, or at least 27 days, or at least 28 days (or four weeks), or at least 29 days, or at least 30 days, or at least one month, prior to or after starting pirfenidone therapy. In some embodiments, the fluvoxamine is discontinued no earlier than one month, 3 weeks, 2 weeks or 1 week before starting pirfenidone therapy. Preferably, sufficient time is allowed for tapering and/or withdrawal of fluvoxamine therapy.
In some embodiments in which the drug being discontinued is a CYP inhibitor, the drug is discontinued within at least 3 days prior to or after starting pirfenidone therapy. In various embodiments, the drug that is a CYP inhibitor is discontinued within at least 4 days, or at least 5 days, or at least 6 days, or at least 7 days (or one week), or at least 8 days, or at least 9 days, or at least 10 days, or at least 11 days, or at least 12 days, or at least 13 days, or at least 14 days (or two weeks), or at least 15 days, or at least 16 days, or at least 17 days, or at least 18 days, or at least 19 days, or at least 20 days, or at least 21 days (or three weeks), or at least 22 days, or at least 23 days, or at least 24 days, or at least 25 days, or at least 26 days, or at least 27 days, or at least 28 days (or four weeks), or at least 29 days, or at least 30 days, or at least one month, prior to or after starting pirfenidone therapy. In some embodiments, the drug that is a CYP inhibitor is discontinued no earlier than one month, 3 weeks, 2 weeks or 1 week before starting pirfenidone therapy. Preferably, sufficient time is allowed for tapering and/or withdrawal of the drug upon discontinuation.
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy, comprising discontinuing administration of the CYP1A2 substrate to avoid an adverse drug interaction and administering a therapeutîcally effective amount of pirfenidone. In some embodiments, the drug that is a CYP1A2 substrate is discontinued concurrent with starting administration of pirfenidone. In other embodiments, the drug that is a CYP1A2 substrate is discontinued within at least 3 days to 1 month prior to or after starting pirfenidone therapy. This time period, for example, permits adéquate time for tapering and withdrawal wlthout adverse effects.
In some embodiments in which a CYP1A2 substrate is discontinued to avoid an adverse drug interaction, the CYP1A2 substrate is discontinued within at least 3 days prior to or after starting pirfenidone therapy. In various embodiments, the CYP1A2 substrate is discontinued within at least 4 days, or at least 5 days, or at least 6 days, or at least 7 days (or one week), or at least 8 days, or at least 9 days, or at least 10 days, or at least 11 days, or at least 12 days, or at least 13 days, or at least 14 days (or two weeks), or at least 15 days, or at least 16 days, or at least 17 days, or at least 18 days, or at least 19 days, or at least 20 days, or at least 21 days (or three weeks), or at least 22 days, or at least 23 days, or at least 24 days, or at least 25 days, or at least 26 days, or at least 27 days, or at least 28 days (or four weeks), or at least 29 days, or at least 30 days, or at least one month, prior to or after starting pirfenidone therapy. In some embodiments, the CYP1A2 substrate is discontinued no earlier than one month, 3 weeks, 2 weeks or 1 week before starting pirfenidone therapy. Preferably, sufficient time is allowed for tapering and/or withdrawal of the CYP1A2 substrate therapy.
Selecting an alternative drug to administer concurrently with pirfenidone therapy
In some aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of therapy with a drug that is a moderatestrong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2.
In another embodiment, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of therapy with a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6.
In some embodiments, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of therapy with a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, and/or CYP3A4, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, and/or CYP3A4.
In other aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of therapy with a drug that is a strong
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CYP1A2 inhibitor, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not a strong CYP1A2 inhibitor.
In yet other aspects, the invention provides a method of administering pirfenidone therapy to a patient in need of pirfenidone therapy and in need of therapy with a drug that is a CYP1A2 substrate, comprising administering a therapeutically effective amount of pirfenidone to the patient, and administering an alternative therapy that is not a CYP1A2 substrate.
Improving administration of pirfenidone by advising or cautioning patient
The administration of a therapeutically effective amount of pirfenidone to a patient in need of pirfenidone therapy can be improved. In some embodiments, the patient is advised that coadministration of pirfenidone with drugs that are a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 can alter the therapeutic effect or adverse reaction profile of pirfenidone. In some embodiments, the patient is advised that co-administration of pirfenidone with fluvoxamine can alter the therapeutic effect or adverse reaction profile of pirfenidone. In some embodiments, the patient is advised that co-administration of pirfenidone with drugs that are a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2, can alter the therapeutic effect or adverse réaction profile of pirfenidone. In some embodiments, the patient îs advised that co-administration of pirfenidone with a drug that is a strong CYP1A2 inhibitor can alter the therapeutic effect or adverse reaction profile of pirfenidone. In some embodiments, the patient is advised that co-administration of pirfenidone with a drug that is a CYP1A2 substrate can alter the therapeutic effect or adverse reaction profile of pirfenidone.
In some embodiments, the patient is advised that use of pirfenidone in patients being treated with fluvoxamine is contraindicated. In some embodiments, the patient is advised that co-administration of pirfenidone and fluvoxamine resulted in a 6-fold increase in exposure to pirfenidone.
In some embodiments, the patient is advised that use of pirfenidone in patients being treated with a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 is contraindicated. In some embodiments, the patient is advised that pirfenidone should be used with caution in patients taking a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4.
In some embodiments, the patient is advised that use of pirfenidone in patients being treated with a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6 is contraindicated. In some embodiments, the patient is advised that pirfenidone should be used with caution in patients taking a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6.
Dosing and dose modifications
In various embodiments, a method of administering pirfenidone and fluvoxamine concurrently is provided wherein the patient is administered a therapeutically effective amount of fluvoxamine and a dosage of pirfenidone that is decreased relative to a patient not taking fluvoxamine. In some aspects, such a decreased dosage of pirfenidone is less than 2400 mg/day. For example, the decreased dosage is about 2136 mg per day, 1869 mg per day, 1602 mg per day, 1335 mg per day, or 1068 mg per day (e.g., 8, 7, 6, 5, 4, or 3 capsules per day where each capsule is approximately 267 mg). In some embodiments, the patient is already being administered fluvoxamine. In other embodiments, the patient is already being administered pirfenidone. In related embodiments, the dosage of pirfenidone is decreased prior to administration of fluvoxamine.
In other aspects, a method of administering pirfenidone and a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2 concurrently is provided wherein the patient is administered a therapeutically effective amount of the drug that is a CYP inhibitor and a dosage of pirfenidone that is decreased relative to a patient not taking such drug that is a CYP inhibitor. In some aspects, such a decreased dosage of pirfenidone is less than 2400 mg/day. For exampîe, the decreased dosage is about 2136 mg per day, 1869 mg per day, 1602 mg per day, 1335 mg per day, or 1068 mg per day (e.g., 8, 7, 6, 5, 4, or 3 capsules per day where each capsule is approximately 267 mg). In some embodiments, the patient is already being administered the drug that is a CYP inhibitor. In other embodiments, the patient is already being administered pirfenidone. In related embodiments, the dosage of pirfenidone is decreased prior to administration of the drug that is a CYP inhibitor.
In other aspects, a method of administering pirfenidone and a drug thaï is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 concurrently is provided, wherein the patient is administered a therapeutically effective amount of the drug that is a CYP inhibitor and a dosage of pirfenidone that is decreased relative to a patient not taking such drug that is a 18
CYP inhibitor. In related aspects, a method of administering pirfenidone and a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6 concurrently is provided, wherein the patient is administered a therapeutically effective amount of the drug that is a CYP inhibitor and a dosage of pirfenidone that is decreased relative to a patient not taking such drug that is a CYP inhibitor. In some aspects, such a decreased dosage of pirfenidone is less than 2400 mg/day. For example, the decreased dosage is about 2136 mg per day, 1869 mg per day, 1602 mg per day, 1335 mg per day, or 1068 mg per day (e.g., 8, 7, 6, 5, 4, or 3 capsules per day where each capsule is approximately 267 mg). In some embodiments, the patient is already being administered the drug that is a CYP inhibitor. In other embodiments, the patient is already being administered pirfenidone. In related embodiments, the dosage of pirfenidone is decreased prior to administration of the drug that is a CYP inhibitor.
In yet other aspects, a method of administering pirfenidone and a strong CYP1A2 inhibitor concurrently is provided wherein the patient is administered a therapeutically effective amount of the strong CYP1A2 inhibitor and a dosage of pirfenidone that is decreased relative to a patient not taking the strong CYP1A2 inhibitor. In some aspects, such a decreased dosage of pirfenidone is less than 2400 mg/day. For example, the decreased dosage is about 2136 mg per day, 1869 mg per day, 1602 mg per day, 1335 mg per day, or 1068 mg per day (e.g., 8, 7, 6, 5, 4, or 3 capsules per day where each capsule is approximately 267 mg). In some embodiments, the patient is already being administered the strong CYP1A2 inhibitor. In other embodiments, the patient is already being administered pirfenidone. In related embodiments, the dosage of pirfenidone is decreased prior to administration of the strong CYP1A2 inhibitor.
In various embodiments, a method of administering pirfenidone and a CYP1A2 substrate concurrently is provided wherein the patient is administered a therapeutically effective amount of the CYP1A2 substrate and a dosage of pirfenidone that is decreased relative to a patient not taking the CYP1A2 substrate. In some aspects, such a decreased dosage of pirfenidone is less than 2400 mg/day. For example, the decreased dosage is about 2136 mg per day, 1869 mg per day, 1602 mg per day, 1335 mg per day, or 1068 mg per day (e.g., 8, 7, 6, 5, 4, or 3 capsules per day where each capsule is approximately 267 mg). In some embodiments, the patient is already being administered the CYP1A2 substrate. In other embodiments, the patient is already being administered pirfenidone. In related embodiments, the dosage of pirfenidone is decreased prior to administration of the CYP1A2 substrate.
In some embodiments, the amount of pirfenidone being administered is 2400 or 2403 mg/day. Pirfenidone can be dosed at a total amount of about 50 to about 2400 mg per day.
9-~
The dosage can be divided into two or three doses over the day or given in a single daily dose. Spécifie amounts of the total daily amount of the therapeutic contemplated for the disclosed methods include about 50 mg, about 100 mg, about 150 mg, about 200 mg, about 250 mg, about 267 mg, about 300 mg, about 350 mg, about 400 mg, about 450 mg, about 500 mg, about 534 mg, about 550 mg, about 600 mg, about 650 mg, about 700 mg, about 750 mg, about 800 mg, about 850 mg, about 900 mg, about 950 mg, about 1000 mg, about 1050 mg, about 1068 mg, about 1100 mg, about 1150 mg, about 1200 mg, about 1250 mg, about 1300 mg, about 1335 mg, about 1350 mg, about 1400 mg, about 1450 mg, about 1500 mg, about 1550 mg, about 1600 mg, about 1650 mg, about 1700 mg, about 1750 mg, about 1800 mg, about 1850 mg, about 1869 mg, about 1900 mg, about 1950 mg, about 2000 mg, about 2050 mg, about 2100 mg, about 2136 mg, about 2150 mg, about 2200 mg, about 2250 mg, about 2300 mg, about 2350 mg, and about 2400 mg.
Dosages of pirfenidone can alternately be administered as a dose measured in mg/kg. Contemplated mg/kg doses of the disclosed therapeutics include about 1 mg/kg to about 40 mg/kg. Spécifie ranges of doses in mg/kg include about 1 mg/kg to about 20 mg/kg, about 5 mg/kg to about 20 mg/kg, about 10 mg/kg to about 20 mg/kg, about 10 mg/kg to about 30 mg/kg, and about 15 mg/kg to about 25 mg/kg.
In one embodîment, a dosage amount of pirfenidone is taken with food. In another embodîment, the patient is instructed to administer the dosage of pirfenidone with food.
In some embodiments, a method of administering a SSRI to a patient in need thereof is provided, the improvement comprising discontinuing administration of fluvoxamine, for example, concurrent with starting administration of pirfenidone, and optionally administering an SSRI that is not a moderate to strong inhibitor of both CYP1A2, and a CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of fluvoxamine to the patient does not resuit in an increased exposure to pirfenidone. In some embodiments, the dose is reduced by about 100 mg/day. In other embodiments, the dose is reduced by about 150 mg/day, or about 200 mg/day, or about 250 mg/day, or about 267 mg/day, or about 300 mg/day, or about 350 mg/day, or about 400 mg/day, or about 450 mg/day, or about 500 mg/day, or about 550 mg/day, or about 600 mg/day, or about 650 mg/day, or about 700 mg/day, or about 750 mg/day, or about 800 mg/day (to a total daily dose of about
1600 mg/day or 1602 mg/day), or about 850 mg/day, or about 900 mg/day, or about 950 mg/day, or about 1000 mg/day, or about 1050 mg/day, or about 1100 mg/day, or about 1150 mg/day, or about 1200 mg/day, or about 1250 mg/day, or about 1300 mg/day, or about 1350 mg/day, or about 1400 mg/day, or about 1450 mg/day, or about 1500 mg/day, or about 1600 mg/day (to a total daily dose of about 800 mg/day or 801 mg/day) or more.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2 to the patient by about 100 mg/day.
about 200 about 350 about 550 about 750 or or or or mg/day, mg/day, mg/day, mg/day,
In other embodiments, the dose is reduced by about 150 about 250 about 400 about 600 about 800 or or or or mg/day, or about 267 mg/day, or about 300 mg/day, or about 450 mg/day, or about 500 mg/day, or about 650 mg/day, or about 700 mg/day (to a total daily dose of about 1600 does not resuit in an increased exposure to pirfenidone. In some embodiments, the dose is reduced mg/day, mg/day, mg/day, mg/day, mg/day or 1602 mg/day, or about 850 mg/day, or about 900 mg/day, or about 950 mg/day, or about 1000 mg/day, or about 1050 mg/day, or about 1100 mg/day, or about 1150 mg/day, or about 1200 mg/day, or about 1250 mg/day, or about 1300 mg/day, or about 1350 mg/day, or about 1400 mg/day, or about 1450 mg/day, or about 1500 mg/day, or about 1600 mg/day (to a total daily dose of about 800 mg/day or 801 mg/day) or more.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP3A4 to the patient does not resuit in an increased exposure to pirfenidone. In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of a drug that is a moderate-strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19, CYP3A4, CYP2B6 and/or CYP2D6 to the patient does not resuit in an increased exposure to pirfenidone. In some embodiments, the dose is reduced by about 100 mg/day. In other embodiments, the dose is reduced by about 150 mg/day, or about 200 mg/day, or about 250 mg/day, or about 267 mg/day, or about 300 mg/day, or about 350 mg/day, or about 400 mg/day, or about 450 mg/day, or about 500 mg/day, or about 550 mg/day, or about 600 mg/day, or about 650 mg/day, or about 700 mg/day, or about 750 mg/day, or about 800 mg/day (to a total daily dose of about 1600 mg/day or 1602 mg/day), or about 850 mg/day, or about 900 mg/day, or about 950 mg/day, or about 1000 mg/day, or about 1050 mg/day, or about 1100 mg/day, or
Q16234 about 1150 mg/day, or about 1200 mg/day, or about 1250 mg/day, or about 1300 mg/day, or about 1350 mg/day, or about 1400 mg/day, or about 1450 mg/day, or about 1500 mg/day, or about 1600 mg/day (to a total daily dose of about 800 mg/day or 801 mg/day) or more.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of a strong CYP1A2 inhibitor to the patient does not resuit in an increased exposure to pirfenidone. In some embodiments, the dose is reduced by about 100 mg/day. In other embodiments, the dose is reduced by about 150 mg/day, or about 200 mg/day, or about 250 mg/day, or about 10 267 mg/day, or about 300 mg/day, or about 350 mg/day, or about 400 mg/day, or about 450 mg/day, or about 500 mg/day, or about 550 mg/day, or about 600 mg/day, or about 650 mg/day, or about 700 mg/day, or about 750 mg/day, or about 800 mg/day (to a total daily dose of about 1600 mg/day or 1602 mg/day), or about 850 mg/day, or about 900 mg/day, or about 950 mg/day, or about 1000 mg/day, or about 1050 mg/day, or about 1100 mg/day, or 15 about 1150 mg/day, or about 1200 mg/day, or about 1250 mg/day, or about 1300 mg/day, or about 1350 mg/day, or about 1400 mg/day, or about 1450 mg/day, or about 1500 mg/day, or about 1600 mg/day (to a total daily dose of about 800 mg/day or 801 mg/day) or more.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a 20 previously administered dosage in the patient, wherein co-administration of a CYP1A2 substrate to the patient does not resuit in an increased exposure to pirfenidone. In some embodiments, the dose is reduced by about 100 mg/day. In other embodiments, the dose is reduced by about 150 mg/day, or about 200 mg/day, or about 250 mg/day, or about 267 mg/day, or about 300 mg/day, or about 350 mg/day, or about 400 mg/day, or about 450 25 mg/day, or about 500 mg/day, or about 550 mg/day, or about 600 mg/day, or about 650 mg/day, or about 700 mg/day, or about 750 mg/day, or about 800 mg/day (to a total daily dose of about 1600 mg/day or 1602 mg/day), or about 850 mg/day, or about 900 mg/day, or about 950 mg/day, or about 1000 mg/day, or about 1050 mg/day, or about 1100 mg/day, or about 1150 mg/day, or about 1200 mg/day, or about 1250 mg/day, or about 1300 mg/day, or 30 about 1350 mg/day, or about 1400 mg/day, or about 1450 mg/day, or about 1500 mg/day, or about 1600 mg/day (to a total daily dose of about 800 mg/day or 801 mg/day) or more.
In some embodiments, a method of administering pirfenidone therapy to a patient receiving fluvoxamine therapy is provided, comprising administering to the patient a therapeutically effective amount of fluvoxamine and administering to the patient a daily dosage of 35 pirfenidone that is less than 2400 mg or 2403 mg per day, e.g. 1600 mg or 1602 mg per day. In some embodiments, the dosage of pirfenidone is decreased prior to administration of fluvoxamine. Similarly, in any of the foregoing embodiments relating to other CYP —
inhibitors or CYP substrates, the daily dosage of pirfenidone that is less than 2400 mg or 2403 mg per day may be, e.g. 1600 mg or 1602 mg per day.
In some embodiments, a method of optimizing pirfenidone therapy is provided comprising titrating the dosage of pirfenidone administered to a patient downward relative to a previously administered dosage in the patient, wherein co-administration of fiuvoxamine to the patient does not resuit in an increased exposure to pirfenidone. It is understood that, in such embodiments comprising dose titration downwards, upon discontinuation of fiuvoxamine, the dosage is titrated back up to a dose that is not less than 2400 or 2403 mg/day. As noted above, in any of the embodiments described herein, including but not limited to discontinuation or dose titration downwards, the packages and kits, and/or the methods of preparing or packaging pirfenidone, the pirfenidone, uses, methods, packages, kits, advice, warnings, discontinuation or dose titration may apply not only to fiuvoxamine but also to (a) any other drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consîsting of CYP3A4, CYP2C9, and/or CYP2C19, or (b) a drug that is a strong inhibitor of CYP1A2 that also has inhibitory effects on other CYP isozymes [2C9, 2C19, and/or 3A4]), or (c) any other drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consîsting of CYP3A4, CYP2C9, CYP2C19, CYP2B6, and/or CYP2D6, or (d) any other drug that is a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme that metabolizes pirfenidone, e.g. selected from the group consîsting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2, or (e) any other drug that is a strong inhibitor of CYP1A2 or (f) any other drug that is a substrate for CYP1A2.
Packages, kits, methods of packaging, and methods ofdelivering
In another aspect, a package or kit is provided comprising pirfenidone, optionally in a container, and a package insert, package label, instructions or other labeling including any one, two, three or more of the following information or recommendations:
use of fiuvoxamine should be avoided or discontinued, co-administration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consîsting of CYP3A4, CYP2C9, and/or CYP2C19, can alter the therapeutic effect or adverse reaction profile of pirfenidone, co-administration of pirfenidone with fiuvoxamine can alter the therapeutic effect or adverse reaction profile of pirfenidone, use of pirfenidone in patients being treated with fiuvoxamine is contraindicated, 'Z' co-administration of pirfenidone and fluvoxamine resulted in an average 6-fold increase in exposure to pirfenidone, and/or strong CYP1A2 inhibitors should be used with caution in patients receiving pirfenidone due to the potential for reduced pirfenidone clearance.
In some embodiments, the information or recommendation may include that coadministration of pirfenidone and fluvoxamine resulted in a 2-fold increase in average peak sérum concentration of pirfenidone (Cmax).
In other embodiments, the information or recommendation may include that coadministration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6, and/or CYP2D6 can alter the therapeutic effect or adverse reaction profile of pirfenidone. In other embodiments, the information or recommendation may include that co-administration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP1A1, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C18, CYP2C19, CYP2D6, CYP2E1, CYP2J2 CYP3A4, CYP3A5, CYP4A11 and/or CYP4F2 can alter the therapeutic effect or adverse reaction profile of pirfenidone. In other embodiments, the information or recommendation may include that co-administration of pirfenidone with drugs that are strong CYP1A2 inhibitors can alter the therapeutic effect or adverse reaction profile of pirfenidone. In other embodiments, the information or recommendation may include that coadministration of pirfenidone with drugs that are CYP1A2 substrates can alter the therapeutic effect or adverse reaction profile of pirfenidone.
In other embodiments, the information or recommendation may include that drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, and/or CYP2C19 should be avoided or discontinued, or are contraindicated, or should be used with caution. In yet further embodiments, the information or recommendation may include that administering a strong CYP1A2 inhibitor should be avoided or discontinued, or are contraindicated, or should be used with caution. In other embodiments, the information or recommendation may include that drugs that are CYP1A2 substrates should be avoided or discontinued, or are contraindicated, or should be used with caution.
The package insert, package label, instructions or other labelîng may further comprise directions for treating IPF by administering pirfenidone, e.g., at a dosage of 2400 mg or 2403 mg per day.
In related aspect, the invention provides a method of preparing or packaging a pirfenidone médicament comprising packaging pirfenidone, optionally in a container, together with a package insert or package label or instructions including any one, two, three or more of the foregoing information or recommendations.
In some embodiments, a method of treating IPF is disclosed comprising providing, selling or delivering any of the kits of disclosed herein to a hospital, physician or patient.
In some embodiments, a kit is provided comprising fluvoxamine and a package insert, package label, instructions, or other labeling comprising any one, two, three or more of the following warnings:
use of fluvoxamine and pirfenidone is contraîndicated (b) use of pirfenidone in patients being treated with fluvoxamine is contraîndicated, and/or co-administration of pirfenidone and fluvoxamine resulted in an average 6-fold increase in exposure to pirfenidone.
co-administration of pirfenidone and fluvoxamine resulted in an average 2-fold increase in peak sérum concentration of pirfenidone.
In some embodiments, a method of treating a patient in need of fluvoxamine is provided comprising providing or delivering any of the kits disclosed herein comprising fluvoxamine to a hospital, physician or patient.
In related aspects, the invention provides a method of administering a SSRI to a patient in need thereof, the improvement comprising discontinuing administration of fluvoxamine, for example, concurrent with startîng administration of pirfenidone, and optionally administering an SSRI that is not a moderate to strong inhibitor of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, and/or CYP2C19.
The invention will be more fully understood by reference to the following examples which detail exemplary embodiments of the invention. They should not, however, be construed as limiting the scope of the invention. Ail citations throughout the disclosure are hereby expressly incorporated by reference.
EXAMPLES
Example 1
An open-label Phase 1 study was performed to détermine the impacts of fluvoxamine on the pharmacokinetics and safety of pirfenidone in healthy subjects.
Study Design. The study was a Phase 1, open-label, parallel-group study in healthy subjects. Fifty-four subjects were to be enrolled in two groups, consisting of 27 subjects
--- 25 Q16234 who were smokers (Group 1) and 27 subjects who were nonsmokers (Group 2). Smoking induces CYP1A2 activity. Each group (smokers and nonsmokers) was to include a minimum of nine females and nine males, and attempts were to be made to enroll equal numbers of each sex in each group. Each subject was to receive a single 801-mg dose of pirfenidone on Days 1 and 11. Fluvoxamine dosing was started on Day 2 and titrated to the final dose according to the following schedule:
• Days 2-4: fluvoxamine 50 mg at bedtime • Days 5-7: fluvoxamine 50 mg twice a day (in the morning and at bedtime) • Days 8 - 11 : fluvoxamine 50 mg in the morning and 100 mg at bedtime
Ail pharmacokinetic (PK) analyses were conducted using population PK methods using Monte-Carlo parametric expectation maximization as implemented in the open-source software program S ADAPT 1.5.6 (Bauer et al., AAPS Journal 9(1):E60-83, 2007). The structural model for the analysis was obtained from a preliminary population PK analysis. This population PK model was fit to the pirfenidone and 5 carboxy-pirfenidone plasma concentration-time data from Days 1 and 11 separately. Once a final population PK model was defined, AUC0.- estimâtes were generated by simulating plasma PK profiles and compared for statistically significant différences between days (to test the effect of fluvoxamine co-administration) and between groups (to test the effect of smoking status).
As the primary endpoint of the study, différences in the pirfenidone and 5 carboxy pirfenidone AUC0.„ estimâtes between Days 1 and 11, and between smokers and nonsmokers were tested for significance. The analysis of the effect of fluvoxamine (I.e., Day 1 versus Day 11) was analyzed using the FDA crîteria for bioequivalence for paired data (FDA 2003). The ratio of AUC0.~ on Day 11 to that on Day 1 was used to test for the interaction between smoking status and fluvoxamine coadministration. If other subject characteristics (such as body size or âge) were also associated with the ratio of AUC0.« on Day 11 to that on Day 1, the significance of these covariates was also tested. The significance of différences in pirfenidone and 5-carboxy-pirfenidone AUC0.~ estimâtes on Day 1 in smokers and nonsmokers was tested using multivariable linear régression in order to take into account the effects of other significant covariates.
Pharmacokinetic Results. Fifty-one of the 54 subjects enrolled in the study were included in the PK analyses. Three subjects were removed from the PK analyses as they did not meet the protocol-specified requirement for adéquate compliance with the fluvoxamine dosing regimen. Two subjects discontinued the study early due to adverse events, and one subject only took 73% of the protocol-required fluvoxamine dose. Ail 51 subjects had the full complément of PK samples available for analysis. Each subject had two profiles on each day: one for pirfenidone and one for 5-carboxy pirfenidone. There were a total of 1224 _ __ 26 _ _ samples (12 per subject per day); each sample was assayed for pirfenidone and 5-carboxypirfenidone for a total of 2448 concentrations.
A robust fit to the data was obtained using the population PK structural model. In general, the fits of the data were excellent: 98% of the individual profiles had r2 values above 0.9 and there was no systematic bias in the fits.
The summary statistics of AUC0.~ stratified by study day are provided in Table 1. Symmetrical dot density plots of pirfenidone and 5-carboxy pirfenidone AUC0.„ values versus study day, identified by smoking status, are provided in Figure 1. The coadministration of fluvoxamine resulted in a significant increase in the AUC0.~ of pirfenidone (p < 0.00001). There was not a statistically significant effect of fluvoxamine coadministration on 5-carboxy pirfenidone AUC0.-.
Table 1 Comparison of AUCO-œ Between Study Days (n=51)
Study Day Statistic AUC0.e (mg-hr/L)
Pirfenidone0 | 5-CarboxyPirfenidoneb | ||
1 : Pre- Fluvoxamine | Mean (SD) Médian (25th - 75th) | 34.9 (16.9) | 29.3 (8.22) |
34.7 (21.4 - 45.9) | 26.9 (22.0 - 33.7) | ||
11 : Post- Fluvoxamine | Mean (SD) Médian (25th - 75,h) | 171 (47.7) | 31.7 (8.96) |
167 (126-206) | 29.4 (25.4 - 36.5) |
0 p-value < 0.00001 (paired t-test) 6 p-value = 0.168 (paired t-test)
AUC0.« = area under the concentration-time curve from time zéro to infinity; SD = standard déviation.
There was also a large apparent différence in the Cmax estimâtes pre- and post-fluvoxamine; the pirfenidone Cmax was higher after administration of fluvoxamine while the 5-carboxy pirfenidone Cmax was lower after administration of fluvoxamine. The mean (95%CI) for the ratio of Cmax on Day 11 to the Cmax on Day 1 was 2.09 (1,94 - 2.25) for pirfenidone and 0.369 (0.349 - 0.390) for 5-carboxy-pirfenidone,
The summary statistics of the ratio of the AUC0.„ on Day 11 to the AUC0.„ on Day 1, stratified by smoking status, are provided in Table 2. While both smokers and nonsmokers were affected by the coadministration of fluvoxamine, smokers appeared to hâve a more pronounced increase in exposure to pirfenidone, as evidenced by the higher ratio of Day 11 to Day 1 AUC. Given that there was an imbalance in the demographics between smokers and nonsmokers (smokers were younger, heavier and predominantly male), the impact of 5 these variables on the ratio of the pirfenidone AUC0.- on Day 11 to the AUC0.~ on Day 1 was tested using multiple linear régression. Using backward élimination (p-value for removal=0.10), smoking status was the only significant predictor of the ratio of the pirfenidone AUC0.- on Day 11 to the AUCD.„ on Day 1; body size, sex, and âge were not significant.
Table 2 Comparison of Ratio of Day 11 AUCo^ to Day 1 AUCO r by Smoking Status
Smoking Statistic Pirfenidone 5-CarboxyStatus Pirfenidone
Smokers | N Mean (SD) Médian (25,h - 75,h) | 26 7.32 (2.12) 7.07 (6.12-8.25) | 26 1.12 (0.0951) 1.13 (1.04-1.19) |
Nonsmokers | N Mean (SD) Médian (25,h - 75th) | 25 4.13 (1.15) 3.99 (3.26-4.68) | 25 1.05 (0.114) 1.03 (0.978- 1.11) |
AUCq.w = area under the concentration-time curve from time zéro to infinïty; SD = standard déviation.
In summary, the design and execution of this study allowed for a robust and informative analysis of the effects of CYP1A2 inhibition on the pharmacokinetics of pirfenidone. Administration of the potent CYP inhibitor fluvoxamine resulted in a significant drug interaction and markedly increased pirfenidone exposure. Smokers were Jikely to 15 expérience significantly lower pirfenidone exposure (in the absence of the drug interaction) presumably due to the inductive effects of smoking.
The coadministration of fluvoxamine resulted in a significant drug interaction such that exposure (AUC0.~) to pirfenidone was, on average, nearly 6 times higher after ten days of dosing with fluvoxamine. Subjects also experienced, on average, a two-fold increase in 20 Cmax after administration of fluvoxamine.
- — - 28 a
While the présent invention has been described in terms of various embodiments and examples, it is understood that variations and improvements will occur to those skilled in the art.
Examples of embodiments of the invention include:
1. Pirfenidone for use in treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use of fluvoxamine.
2. The use of pirfenidone in the manufacture of a médicament for treating a patient in need of pirfenidone therapy, characterized in that the treating comprises avoiding, contraindicating or discontinuing concomitant use of fluvoxamine.
3. The pirfenidone of paragraph 1 or use of paragraph 2 wherein the patient is a patient who is avoiding concomitant use of fluvoxamine because concomitant use of pirfenidone with fluvoxamine is contraindicated.
4. The pirfenidone of paragraph 1 or use of paragraph 2 wherein the patient is a patient who has discontinued use of fluvoxamine prior to the initiation of pirfenidone therapy in order to avoid reduced clearance of [or increased exposure to] pirfenidone.
5. Pirfenidone or use of any one of paragraphe 1 to 3, wherein administration of fluvoxamine to the patient is contraindicated or avoided in order to avoid reduced clearance of [or increased exposure to] pirfenidone.
6. The pirfenidone or use of paragraph 4, wherein the patient has discontinued administration of fluvoxamine within 1 month prior to starting pirfenidone therapy.
7. The pirfenidone or use of paragraph 4, wherein the patient has discontinued administration of fluvoxamine within 2 weeks prior to starting pirfenidone therapy.
8. The pirfenidone or use of any one of paragraphs 1 to 7 wherein the patient suffers from a disease selected from pulmonary fibrosis, idiopathic pulmonary fibrosis, idiopathic interstitial pneumonia, autoimmune lung diseases, benign prostate hypertrophy, coronary or myocardial infarction, atrial fibrillation, cérébral infarction, myocardiac fibrosis, musculoskeletal fibrosis, post-surgical adhesions, liver cirrhosis, rénal fibrotic disease, fibrotic vascular disease, scleroderma, Hermansky-Pudlak syndrome, neurofibromatosis, Alzheimeris disease, diabetic _ _ . 29 _ _ __
O16234 retinopathy, or skin lésions, lymph node fibrosis associated with HIV, chronic obstructive pulmonary disease (COPD), inflammatory pulmonary fibrosis, rheumatoid arthritis; rheumatoid spondylitis; osteoarthritis; goût, other arthritic conditions; sepsis; septic shock; endotoxic shock; gram-negative sepsis; toxic shock syndrome; myofacial pain syndrome (MPS); Shigellosis; asthma; adult respiratory distress syndrome; inflammatory bowel disease; Crohn’s disease; psoriasis; eczema; ulcerative colitis; glomerular nephritis; scleroderma; chronic thyroiditis; Grave's disease; Ormond's disease; autoimmune gastritis; myasthenia gravis; autoimmune hemolytic anémia; autoimmune neutropenia; thrombocytopenia; pancreatic fibrosis; chronic active hepatitis including hepatic fibrosis; acute or chronic rénal disease; rénal fibrosis; diabetic nephropathy; irritable bowel syndrome; pyresis; restenosis; cérébral malaria; stroke or ischémie injury; neural trauma; Alzheimer's disease; Huntington's disease; Parkinson's disease; acute or chronic pain; allergies, including allergie rhinitis or allergie conjunctivitis; cardiac hypertrophy, chronic heart failure; acute coronary syndrome; cachexia; malaria; leprosy; leishmaniasis; Lyme disease; Reiter’s syndrome; acute synoviitis; muscle degeneration, bursitis; tendonitis; tenosynoviitis; herniated, ruptured, or prolapsed intervertébral disk syndrome; osteopetrosis; thrombosis; silicosis; pulmonary sarcosis; bone résorption diseases, such as osteoporosis or multiple myeloma-related bone disorders; cancer, including but not limited to metastatic breast carcinoma, colorectal carcinoma, malignant melanoma, gastric cancer, or non-small cell lung cancer; graft-versus-host reaction; or auto-immune diseases, such as multiple sclerosis, lupus or fibromyalgia; AIDS or other viral diseases such as Herpes Zoster, Herpes Simplex l or II, influenza virus, Severe Acute Respiratory Syndrome (SARS) or cytomégalovirus; or diabètes mellitus, proliférative disorders (including both benign or malignant hyperplasias), acute myelogenous leukemia, chronic myelogenous leukemia, Kaposi's sarcoma, metastatic melanoma, multiple myeloma, breast cancer, including metastatic breast carcinoma; colorectal, carcinoma; malignant melanoma; gastric cancer; non-small cell lung cancer (NSCLC); bone métastasés; pain disorders including neuromuscular pain, headache, cancer pain, dental pain, or arthritis pain; angiogenic disorders including solid tumor angiogenesis, ocular neovascularization, or infantile hemangioma; conditions associated with the cyclooxygenase or lipoxygenase signaling pathways, including conditions associated with prostaglandin endoperoxide synthase-2 (including edema, fever, analgesia, or pain); organ hypoxia; thrombininduced platelet aggregation; or protozoal diseases.
9. The pirfenidone or use of any one of paragraphe 1 to 7 wherein the patient has Idiopathic Pulmonary Fibrosis (IPF).
10. The pirfenidone or use of any one of paragraphs 1 to 9, wherein the pirfenidone is administered at a total daily dosage of 2400 mg or 2403 mg per day.
11. The pirfenidone or use of any one of paragraphs 1 to 10, wherein each dose of pirfenidone administered is 801 mg.
12. The pirfenidone or use of paragraph 11, wherein the pirfenidone is for administration to the patient three times per day, with food.
Other examples of embodiments of the invention include:
1A. A method of administering pirfenidone therapy to a patient in need thereof, comprising administering to the patient a therapeutically effective amount of pirfenidone, and avoiding administration of fluvoxamine.
2A. The method of paragraph 1A wherein the patient has idiopathic pulmonary fibrosis (IPF).
3A, The method of paragraph 1A wherein the therapeutically effective amount of pirfenidone is a daily dosage of 2400 mg or 2403 mg per day.
4A. The method of paragraph 1A wherein 800 or 801 mg of pirfenidone is administered to the patient three times per day, with food.
5A. A method of administering pirfenidone therapy to a patient in need thereof, comprising discontinuing administration of fluvoxamine to avoid an adverse drug interaction, and administering to the patient a therapeutically effective amount of pirfenidone.
6A. The method of paragraph 5A wherein the patient has idiopathic pulmonary fibrosis (IPF).
7A. The method of paragraph 5A wherein the therapeutically effective amount of pirfenidone is a daily dosage of 2400 mg or 2403 mg per day.
8A. The method of paragraph 5A wherein 800 or 801 mg of pirfenidone is administered to the patient three times per day, with food.
9A. The method of paragraph 5A wherein the fluvoxamine is discontinued within 1 month prior to starting pirfenidone therapy.
10A, The method of paragraph 5A wherein the fluvoxamine is discontinued within 2 weeks prior to starting pirfenidone therapy.
A. A method of administering pirfenidone therapy to a patient in need thereof, comprising administering to the patient a therapeutically effective amount of pirfenidone, and any one or more of the following:
(a) advising the patient that fluvoxamine should be avoided or discontinued, ?
(b) advising the patient that co-administration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and CYP3A4 can alter the therapeutîc effect or adverse reaction profile of pirfenidone, (c) advising the patient that co-administration of pirfenidone with fluvoxamine can alter the therapeutîc effect or adverse reaction profile of pirfenidone, (d) advising the patient that use of pirfenidone in patients being treated with fluvoxamine is contraindicated, (e) advising the patient that co-administration of pirfenidone and fluvoxamine resulted in a 6-fold increase in exposure to pirfenidone, or
f) advising the patient that strong CYP1A2 inhibitors should be used with caution in patients receiving pirfenidone due to the potentîal for reduced pirfenidone clearance.
12A. The method of paragraph 11A wherein the patient is advised that fluvoxamine should be avoided or discontinued.
13A. The method of paragraph 11A wherein the patient is advised that coadministration of pirfenidone with drugs that are moderate to strong inhibitors of both CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and CYP3A4 can alter the therapeutîc effect or adverse reaction profile of pirfenidone.
14A. The method of paragraph 11A wherein the patient is advised that coadministration of pirfenidone with fluvoxamine can alter the therapeutîc effect or adverse reaction profile of pirfenidone.
15A. The method of paragraph 11A wherein the patient is advised that use of pirfenidone in patients being treated with fluvoxamine is contraindicated.
16A. The method of paragraph 11A wherein the patient is advised that coadministration of pirfenidone and fluvoxamine resulted in a 6-fold increase in exposure to pirfenidone.
17A. The method of paragraph 16A further comprising advising the patient that coadministration of pirfenidone and fluvoxamine resulted in a 2-fold increase in average peak sérum concentration of pirfenidone (Cmax).
18A. The method of paragraph 11A wherein the patient is advised that strong CYP1A2 inhibitors should be used with caution in patients receiving pirfenidone due to the potentîal for reduced pirfenidone clearance.
19A. The method of paragraph 18A further comprising avoiding administering a strong CYP1A2 inhibitor.
-------- — — 32 -- -- ---16234
20A, The method of paragraph 18A further comprising discontinuing administration of a strong CYP1A2 inhibitor.
Claims (18)
1. Pirfenidone for use in treating a patient in need of pirfenidone therapy, characterized in that the treating comprises (a) avoiding, contraindicating, discontinuing or using with caution concomitant use or co-administration of a cytochrome P450 1A2 (CYP1A2) inhibitor
2. Use of pirfenidone in préparation of a médicament for treating a patient in need
3. The pirfenidone, use or method of any of daims 1-2 wherein the CYP1A2 inhibitor is a moderate to strong inhibitor of CYP1A2 and another CYP enzyme selected from the group consisting of CYP2C9, CYP2C19 and/or CYP2D6.
20
4. The pirfenidone, use or method of any of daims 1-2 wherein the CYP1A2 inhibitor is a strong CYP1A2 inhibitor.
5 pneumonia, autoimmune lung diseases, benign prostate hypertrophy, coronary or myocardial infarction, atrial fibrillation, cérébral infarction, myocardiac fibrosis, musculoskeletal fibrosis, post-surgical adhesions, liver cirrhosis, rénal fibrotic disease, fibrotic vascular disease, scleroderma, Hermansky-Pudlak syndrome, neurofibromatosis, Alzheimer's disease, diabetic retinopathy, or skin lésions, lymph node fibrosis associated with HIV, chronic obstructive
5. The pirfenidone, use or method of any of daims 1-3 wherein the CYP1A2 inhibitor is discontinued prior to starting pirfenidone therapy to avoid an adverse drug interaction with pirfenidone, or to avoid a reduced clearance of pirfenidone.
25
5 that is a moderate to strong inhibitor of both (i) cytochrome P450 1A2 (CYP1A2) and (ii) another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6 and/or CYP2D6, or (b) using with caution pirfenidone in patients receiving a strong inhibitor of CYP1A2, or (c) using with caution a strong CYP1A2 inhibitor in patients receiving pirfenidone.
6. The pirfenidone of any one of daims 1-5 wherein the CYP1A2 inhibitor is discontinued within 1 month prior to starting pirfenidone therapy.
7. The pirfenidone of any one of daims 1-6 wherein the CYP1A2 inhibitor is discontinued within 2 weeks prior to starting pirfenidone therapy.
8. The pirfenidone, use or method of any of daims 1-3 wherein the CYP1A2
30 inhibitor is avoided during pirfenidone therapy.
9. The pirfenidone, use or method of any of daims 1-8 wherein the patient is in need of therapy with a CYP1A2 inhibitor.
10 pulmonary disease (COPD), inflammatory pulmonary fibrosis, rheumatoid arthritis; rheumatoid spondylitis; osteoarthritis; goût, other arthritic conditions; sepsis; septic shock; endotoxic shock; gram-negative sepsis; toxic shock syndrome; myofacial pain syndrome (MPS); Shigellosis; asthma; adult respiratory distress syndrome; inflammatory bowel disease; Crohn's disease; psoriasis; eczema; ulcerative colitis; glomerular nephritis; scleroderma; chronic thyroiditis;
10. The pirfenidone, use or method of any of daims 1-4 wherein the CYP1A2 inhibitor is used with caution.
10 of pirfenidone therapy, characterized in that the treating comprises (a) avoiding, contraindicating, discontinuing or using with caution concomitant use or co-administration of a cytochrome P450 1A2 (CYP1A2) inhibitor that is a moderate to strong inhibitor of both (i) cytochrome P450 1A2 (CYP1A2) and (ii) another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6 and/or CYP2D6, or (b) using with caution
11. The pirfenidone of any one of claims 1-10 wherein the patient has idiopathic pulmonary fibrosis (IPF).
12. The pirfenidone of any of claims 1-10 wherein the patient suffers from a disease selected from idiopathic pulmonary fibrosis, pulmonary fibrosis,, idiopathic interstitial
13. The pirfenidone of any one of claims 1 through 12 wherein the pirfenidone is administered at a total daily dosage of at least 1800 mg.
14. The pirfenidone of any one of claims 1 through 12 wherein the pirfenidone is administered at a total daily dosage of about 2400 mg or 2403 mg.
15. The pirfenidone of any one of claims 1 through 12 wherein 800 or 801 mg of pirfenidone is administered to the patient three times per day, with food.
15 Grave's disease; Ormond's disease; autoimmune gastritis; myasthenia gravis; autoimmune hemolytic anémia; autoimmune neutropenia; thrombocytopenia; pancreatic fibrosis; chronic active hepatitis including hepatic fibrosis; acute or chronic rénal disease; rénal fibrosis; diabetic nephropathy; irritable bowei syndrome; pyresis; restenosis; cérébral malaria; stroke or ischémie injury; neural trauma; Alzheimer's disease; Huntington's disease; Parkinson’s disease; acute or
20 chronic pain; allergies, including allergie rhinitis or allergie conjunctivitis; cardiac hypertrophy, chronic heart failure; acute coronary syndrome; cachexia; malaria; leprosy; leishmaniasis; Lyme disease; Reiter's syndrome; acute synoviitis; muscle degeneration, bursitis; tendonitis; tenosynoviitis; herniated, ruptured, or prolapsed intervertébral disk syndrome; osteopetrosis; thrombosis; silicosis; pulmonary sarcosis; bone résorption diseases, such as osteoporosis or
25 multiple myeloma-related bone disorders; cancer, including but not limited to metastatic breast carcinoma, colorectal carcinoma, malignant melanoma, gastric cancer, or non-small cell lung cancer; graft-versus-host réaction; or auto-immune diseases, such as multiple sclerosis, lupus or fibromyalgia; AIDS or other viral diseases such as Herpes Zoster, Herpes Simplex I or II, influenza virus, Severe Acute Respiratory Syndrome (SARS) or cytomégalovirus; or diabètes
30 mellitus, proliférative disorders (including both benign or malignant hyperplasias), acute myelogenous leukemia, chronic myelogenous leukemia, Kaposi's sarcoma, metastatic melanoma, multiple myeloma, breast cancer, including metastatic breast carcinoma; colorectal, carcinoma; malignant melanoma; gastric cancer; non-small cell lung cancer (NSCLC); bone métastasés; pain disorders including neuromuscular pain, headache, cancer pain, dental pain,
35 or arthritis pain; angiogenic disorders including solid tumor angiogenesis, ocular neovascularization, or infantile hemangioma; conditions associated with the cyclooxygenase or lipoxygenase signaling pathways, including conditions associated with prostaglandin
Q« endoperoxide synthase-2 (including edema, fever, analgesia, or pain); organ hypoxia; thrombininduced platelet aggregation; or protozoal diseases.
15 pirfenidone in patients receiving a strong inhibitor of CYP1A2, or (c) using with caution a strong CYP1A2 inhibitor in patients receiving pirfenidone.
16. The pirfenidone of any one of claims 1 through 15 wherein the CYP1A2 inhibitor is fluvoxamine.
17. The pirfenidone of any one of claims 1 through 16 wherein the CYP1A2 inhibitor is ciprofloxacin, amiodarone or propafenone.
18. A package or kit comprising (a) pirfenidone, optionally in a container, and (b) a package insert, package label, instructions or other labeling comprising avoiding or discontinuing or contraindicating concomitant use of or co-administration of or using with caution (1) a strong inhibitor of CYP1A2, or (2) a moderate to strong inhibitor of both (i) CYP1A2 and (ii) another CYP enzyme selected from the group consisting of CYP3A4, CYP2C9, CYP2C19, CYP2B6 and/or CYP2D6, optionally according to any of the embodiments of claims 1-19.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61/266,815 | 2009-12-04 | ||
US12/684,879 | 2010-01-08 | ||
EP10250379.4 | 2010-03-03 | ||
US61/310,679 | 2010-03-04 | ||
CA2,710,358 | 2010-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
OA16234A true OA16234A (en) | 2015-04-10 |
Family
ID=
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