Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/20—Pills, tablets, discs, rods
  • A61K9/2004—Excipients; Inactive ingredients
  • A61K9/2022—Organic macromolecular compounds
  • A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
  • A61K9/2059—Starch, including chemically or physically modified derivatives; Amylose; Amylopectin; Dextrin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/13—Amines
  • A61K31/135—Amines having aromatic rings, e.g. ketamine, nortriptyline
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/20—Pills, tablets, discs, rods
  • A61K9/2004—Excipients; Inactive ingredients
  • A61K9/2013—Organic compounds, e.g. phospholipids, fats
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/20—Pills, tablets, discs, rods
  • A61K9/2004—Excipients; Inactive ingredients
  • A61K9/2022—Organic macromolecular compounds
  • A61K9/2027—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/20—Pills, tablets, discs, rods
  • A61K9/2004—Excipients; Inactive ingredients
  • A61K9/2022—Organic macromolecular compounds
  • A61K9/2031—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, polyethylene oxide, poloxamers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/20—Pills, tablets, discs, rods
  • A61K9/2004—Excipients; Inactive ingredients
  • A61K9/2022—Organic macromolecular compounds
  • A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
  • A61K9/2054—Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/04—Centrally acting analgesics, e.g. opioids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/24—Antidepressants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/13—Amines

Definitions

• Ketamine is a non- selective NMD A receptor antagonist that has been approved by FDA for induction and maintenance of the general anesthesia. It has also been shown effective in treating other conditions, for example, to alleviate different kinds of pain (Correll, 2003), depression (Zarate, 2012), acute brain injury and stroke (Hertle, 2012), epilepsy (Synowiec, 2013), alcohol dependence, Alzheimer's disease, asthma and other disorders.
• ketamine was used as an oral solution prepared from the commercially available injectable formulation (1 or 10 % ketamine in water), often times mixed with fruit juice or syrup for taste masking. Solid dose forms of ketamine have also been reported in several examples.
• Yanagihara et al. Yamahara 1999, 2003
• oral and sublingual formulations of ketamine as gelatin-based lozenges having a total weight of 1 g and ketamine load of 25 mg have also been prepared by Chong (Chong, 2009).
• ketamine When administered orally, ketamine is a subject to the first-pass liver metabolism via N-demethylation and conversion to the active metabolite Norketamine.
• the elimination half-life of ketamine has been estimated at 2-3 hours, and 4 hours for norketamine. Consequently, the therapeutic window of orally administered ketamine is relatively short, and prompts an oral administration of multiple daily doses of the drug, e.g., 3-5 times a day, to achieve desirable therapeutic effect.
• ketamine solid dose forms of ketamine have been consistently limited by their inability to provide therapeutically effective doses, even in the short-term, without neurologically toxic spikes in ketamine concentration.
• exceeding an optimal efficacy plasma concentration of the drug (10-300 ng/ml) leads to more pronounced side effects, such as sedation, hallucination, dizziness, and/or nausea, which can not only have immediate repercussions, but also effect treatment compliance.
• ketamine formulations that mimic the results of ketamine infusion and afford no neurologically toxic (e.g. , psychotomimetic toxic) plasma concentrations, and which address the identified gap in ketamine treatment of conditions such as pain, depression, traumatic brain injury, stroke, epilepsy, alcohol dependence, or Alzheimer disease.
• neurologically toxic e.g. , psychotomimetic toxic
• the present invention is directed to oral neuro-attenuating ketamine (NAKET) tablet formulations providing improved safety profiles as compared with existing compositions of oral ketamine; as well as methods of administration, which ensure the steady release of a therapeutically effective concentration of ketamine from an oral tablet without psychotomimetic toxic spikes in ketamine concentration.
• NAKET neuro-attenuating ketamine
• the present invention provides single layer oral tablet formulations of NAKET.
• the NAKET tablet formulation, and methods of administration provide steady administration of NAKET to a subject for 24 hours or greater, for example, up to 36 hours, after a single administration event.
• one aspect the present invention provides a single-layer orally administered tablet composition, e.g., matrix composition, comprising neuro-attenuating ketamine (NAKET).
• a single-layer orally administered tablet composition e.g., matrix composition, comprising neuro-attenuating ketamine (NAKET).
• NAKET neuro-attenuating ketamine
• the present invention provides a method of treating a subject with ketamine comprising the step of administering to a subject a single-layer orally administered tablet composition of any formulation described herein comprising neuro- attenuating ketamine (NAKET), such that the subject is treated.
• NAKET neuro- attenuating ketamine
• the present invention provides a method of continuous oral delivery of ketamine.
• the method comprises the steps of formulating ketamine into a single-layer tablet that provides a steady release of a therapeutically effective
• NAKET neuro-attenuating ketamine
• Another aspect of the invention provides a method of formulating ketamine to ensure the steady release of a therapeutically effective concentration of ketamine from an oral tablet without neurologically toxic spikes, e.g. , sedative or psychotomimetic toxic spikes, in plasma ketamine concentration comprising the step of combining (i) a water- insoluble neutrally charged non-ionic matrix; (ii) a polymer carrying one or more negatively charged groups; and (iii) ketamine, to produce a neuro-attenuating ketamine single-layer orally administered tablet composition.
• neurologically toxic spikes e.g. , sedative or psychotomimetic toxic spikes
• An additional aspect of the invention provides a kit for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any formulation described herein comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of pain, e.g. , wherein the instructions for use form an integrated component of the packaging for the tablet composition.
• NAKET neuro-attenuating ketamine
• An additional aspect of the invention provides a kit for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any formulation described herein comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of brain injury, e.g., wherein the instructions for use form an integrated component of the packaging for the tablet composition.
• NAKET neuro-attenuating ketamine
• An additional aspect of the invention provides a kit for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any formulation described herein comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of depression, e.g. , wherein the instructions for use form an integrated component of the packaging for the tablet composition.
• NAKET neuro-attenuating ketamine
• Figure 1 is a graphical depiction of the release profile of ketamine from an HPMC matrix, with and without polyacrylic acid (compositions KTM-1 through KTM-3).
• Figure 2 is a graphical depiction of the release profile of ketamine from the Kollidon matrix, with and without lactose (compositions KTM-4 and KTM-11).
• Figure 3 is a graphical depiction of the release profile of ketamine from a lipid matrix, with and without polyacrylic acid (compositions KTM-9 and KTM- 12).
• Figure 4 is a graphical depiction of the release profile of ketamine from a PEO matrix of two different molecular weights.
• Figure 5 is a graphical depiction of the ketamine concentration vs. time in the blood of beagle dogs after administration of tablet KTM-2.
• ketamine for the treatment of conditions such as pain or depression, or use in migraine (e.g. , with aura), refractory asthma, alcohol dependence, epilepsy, brain injury and/or stroke, has been largely focused on injections or infusion administration mainly due to the consequences of exceeding certain plasma concentrations, beyond which serious neurological side effects result.
• Tablet or capsule formulations of ketamine have generally failed commercially due to the relatively short therapeutic window of orally administered ketamine, which requires an oral administration of multiple daily doses of the drug; and the increased likelihood of exceeding psychotomimetic toxic plasma concentrations of ketamine.
• sustained release formulations have been generally considered for essentially all drugs, it is the implementation of this formulation that takes inventive contribution, and has yet to be achieved for ketamine. Such evidence could not be clearer than from the large commercial need that remains in the market.
• ketamine release should approach 24 hours, and in a manner that does not afford spikes in ketamine plasma concentration.
• NAKET oral neuro-attenuating ketamine
• the present invention provides single layer oral tablet formulation of NAKET.
• the NAKET tablet formulation, and methods of administration provide steady administration of NAKET to a subject for 24 hours or greater, for example, up to 36 hours, after a single administration event, e.g., oral administration of a designated amount of the formulation, whether in one pill, or multiple pills. In certain embodiments, however, reduction of this therapeutic window may be desirable in order to achieve certain advantages for these NAKET tablet formulations, such as tamper resistance.
• the present invention including methods, and pharmaceutical
• ketamine as used alone herein, is art-recognized, and is the common name for the molecule: (R,S)-2-(2-chlorophenyl)-2-(methylamino) cyclohexanone, or
• Ketamine Ketamine is a well-known drug that is very water-soluble (e.g. , solubility of the ketamine hydrochloride in water is about 200 mg/ml), and therefore has a high propensity to be rapidly released from a polymer matrix.
• the term "ketamine” is intended to include both racemic and enantiomerically enriched, e.g. enantiomerically pure, forms.
• the ketamine is racemic ketamine.
• the ketamine is enantiomerically enriched in one enantiomer.
• the ketamine is enriched in the S enantiomer.
• the ketamine is enriched in the R enantiomer.
• ketoamine as used alone herein, is art-recognized, and is the common name for the molecule: (R,S)-2-(2-chlorophenyl)-2-(amino) cyclohexanone, or
• Norketamine is a metabolic product of the demethylation of ketamine, and is considered by many to have activity and clearance similar to that of ketamine.
• “norketamine” is intended to include both racemic and enantiomerically enriched, e.g. enantiomerically pure, forms.
• the norketamine is racemic ketamine.
• the norketamine is enantiomerically enriched in one enantiomer.
• the norketamine is enriched in the S enantiomer.
• the norketamine is enriched in the R enantiomer.
• maximum sustained release describes the release window for certain formulations of the present invention formulated to increase the release period to a maximum value, which is ultimately limited by the time the gastrointestinal tract naturally excretes all drugs with food.
• stamper resistance is art-recognized to describe aspects of a drug formulation that make it more difficult to use the formulation to abuse the drug moiety of the formulation through extraction for intravenous use, or crushing for freebase use; and therefore reduce the risk for abuse of the drug.
• steady describes the stable or steady-state level of a molecule concentration, e.g., ketamine concentration.
• composition is equivalent to the term “formulation.”
• administration event describes the administration of a subject a given dose, in the form of one or more pills within a short window of time, e.g., less than 10 minutes.
• release period describes the time window in which the neuro-attenuating ketamine is released from the matrix to afford plasma concentrations of ketamine and norketamine.
• the start time of the release period is defined from the point of oral administration to a subject, which is considered nearly equivalent to entry into the stomach, and initial dissolution by gastric enzymes and acid.
• the terms “treat,” “treating” and “treatment” refer to the eradication or amelioration of a disease, disorder, or condition, or of one or more symptoms associated with the disease, disorder or condition. In certain embodiments, the terms refer to minimizing the advancement or worsening of the disease, disorder, or condition resulting from the administration of a formulation of the invention to a patient with such a disease, disorder, or condition. In some embodiments, the terms refer to the administration of a formulation provided herein, after the onset of symptoms of the particular disease, disorder, or condition.
• treating covers the treatment of a disease, disorder, or condition in a subject, e.g., a mammal, and includes at least one of: (i) inhibiting the disease, disorder, or condition, i.e., partially or completely halting its progression; (ii) relieving the disease, disorder, or condition, i.e. causing regression of symptoms of the disease, disorder, or condition, or ameliorating a symptom of the disease, disorder, or condition; and (iii) reversal or regression of the disease, disorder, or condition, preferably eliminating or curing of the disease, disorder, or condition.
• the terms “treating”, “treatment”, or the like covers the treatment of a disease, disorder, or condition in a mammal, e.g., a primate, e.g. , a human, and includes at least one of (i), (ii), and (iii) above.
• a mammal e.g., a primate, e.g. , a human
• at least one of (i), (ii), and (iii) above e.g., a primate, e.g. , a human
• adjustments for age, body weight, general health, sex, diet, time of administration, drug interaction and the severity of the condition may be necessary, and will be ascertainable with routine experimentation by one of ordinary skill in the art based on the invention described herein.
• the terms “subject”, and “patient” are used interchangeably.
• the terms “subject” and “patient” refer to an animal (e.g., a bird such as a chicken, quail or turkey) or a mammal including non-primates (e.g., a cow, pig, horse, sheep, rabbit, guinea pig, rat, cat, dog, and mouse) and primates (e.g., a monkey, chimpanzee and a human).
• the subject is a human.
• the terms “prevent,” “preventing” and “prevention” refer to the prevention of the onset, recurrence or spread of a disease, disorder, or condition, or of one or more symptoms thereof.
• the terms refer to the administration of neuro-attenuating ketamine (NAKET) to a subject, with or without other additional active compounds, prior to the onset of symptoms, particularly to patients at risk of a disease, disorder, or condition provided herein.
• NAKET neuro-attenuating ketamine
• the terms encompass the inhibition or reduction of a symptom of the particular disease, disorder, or condition.
• Subjects with familial history of a disease, disorder, or condition, in particular, are candidates for preventive regimens in certain embodiments.
• prevention may be interchangeably used with the term “prophylactic treatment.”
• the prevention is achieved by administration of a prophylactically effective amount of neuro-attenuating ketamine (NAKET) of the invention.
• NAKET neuro-attenuating ketamine
• a "therapeutically effective amount" of an active agent e.g. , neuro-attenuating ketamine (NAKET)
• an active agent e.g. , neuro-attenuating ketamine (NAKET)
• a therapeutically effective amount of neuro-attenuating ketamine (NAKET) means an amount of neuro-attenuating ketamine (NAKET), alone or in combination with other therapies, which provides a therapeutic benefit in the treatment or management of the disease, disorder, or condition.
• therapeutically effective amount can encompass an amount that improves overall therapy, reduces or avoids symptoms or causes of disease, disorder, or condition, or enhances the therapeutic efficacy of another therapeutic agent.
• the therapeutically effective amount for a particular patient in need of such treatment can be determined by considering various factors, such as the condition treated, the overall health of the patient, method of administration, the severity of side-effects, and the like.
• the terms “manage,” “managing” and “management” refer to preventing or slowing the progression, spread or worsening of a disease, disorder, or condition, or of one or more symptoms thereof.
• the beneficial effects that a subject derives from a prophylactic and/or therapeutic agent do not result in a cure of the disease, disorder, or condition.
• the term "managing" encompasses treating a subject who had suffered from the particular disease, disorder, or condition in an attempt to prevent or minimize the recurrence of the disease, disorder, or condition.
• a prophylactically effective amount of an active agent e.g., neuro-attenuating ketamine (NAKET)
• an active agent e.g., neuro-attenuating ketamine (NAKET)
• a prophylactically effective amount of neuro-attenuating ketamine (NAKET) means an amount of neuro-attenuating ketamine (NAKET), alone or in combination with other agents, which provides a prophylactic benefit in the prevention of the disease.
• the term “prophylactically effective amount” can encompass an amount that improves overall prophylaxis or enhances the prophylactic efficacy of another prophylactic agent.
• neurologically toxic spikes is used herein to describe spikes in concentration of ketamine and/or norketamine that would produce side-effects of sedation or psychotomimetic effects, e.g. , hallucination, dizziness, and nausea; which can not only have immediate repercussions, but also effect treatment compliance.
• ketamine side effects may become more pronounced at blood concentration levels above 300 ng/L.
• One embodiment of the present invention provides a single-layer orally administered tablet composition comprising neuro-attenuating ketamine (NAKET), e.g., with reduced neurological adverse effects compared to existing oral formulations.
• NAKET neuro-attenuating ketamine
• the "neuro-attenuating ketamine (NAKET)" utilized in the present invention is ketamine formulated to ensure the steady release of a therapeutically effective
• the present invention provides novel and inventive formulations comprising optimal matrices discovered for the long-term steady release of ketamine, with reduced sedative and psychotomimetic side effects.
• the neuro-attenuating ketamine is psychotomimetic - attenuating ketamine (PAKET), wherein the neurologically toxic spikes are
• psychotomimetic toxic spikes including but are not limited to hallucination, dizziness, and nausea.
• the tablet composition is adapted for maximum sustained release.
• the tablet composition is adapted for tamper resistance.
• the tablet composition comprises polyethylene oxide (PEO), e.g., MW 2,000 to 7,000 KDa, in combination with HPMC.
• the tablet composition may further comprise polyethylene glycol (PEG), e.g. , PEG 8K.
• the tablet composition may further comprise polymer carrying one or more negatively charged groups, e.g. , polyacrylic acid.
• the tablet composition comprising PEO is further subjected to heating/annealing, e.g., extrusion conditions.
• the NAKET comprises a combination of (i) a water- insoluble neutrally charged non-ionic matrix; (ii) a polymer carrying one or more negatively charged groups; and (iii) ketamine.
• the polymer carrying one or more negatively charged groups is selected from the group consisting of polyacrylic acid, polylactic acid, polyglycolic acid, polymethacrylate carboxylates, cation-exchange resins, clays, zeolites, hyaluronic acid, anionic gums, salts thereof, and mixtures thereof.
• the anionic gum is selected from the group consisting of naturally occurring materials and semi- synthetic materials.
• the naturally occurring material is selected from the group consisting of alginic acid, pectin, xanthan gum, carrageenan, locust bean gum, gum arabic, gum karaya, guar gum, and gum tragacanth.
• the semi-synthetic material is selected from the group consisting of carboxymethyl-chitin and cellulose gum.
• the role of the polymer carrying one or more negatively charged groups e.g., moieties of acidic nature as in those of the acidic polymers described herein, surprisingly offers significant retention of ketamine in the matrix.
• this negative charge may be created in situ, for example, based on release of a proton due to pKa and under certain pH conditions or through electrostatic interaction/creation of negative charge.
• acidic polymers may be the salts of the corresponding weak acids that will be the related protonated acids in the stomach; which, and without wishing to be bound by theory, will neutralize the charge and may reduce ketamine interactions with the matrix.
• the release matrix may be further complemented by other inactive
• ingredients to aid in preparation of the appropriate solid dose form such as fillers, disintegrants, flow improving agents, lubricants, colorants, taste maskers.
• the tablet composition is adapted for tamper resistance.
• the tablet composition comprises polyethylene oxide (PEO), e.g., MW 2,000 to 7,000 KDa.
• PEO polyethylene oxide
• the tablet composition comprising PEO is further subjected to heating/annealing, e.g. , extrusion.
• the non-ionic matrix is selected from cellulose-based polymers such as HPMC, alone or enhanced by mixing with components selected from the group consisting of starches; waxes; neutral gums;
• polymethacrylates PVA; PVA/PVP blends; and mixtures thereof.
• the cellulose-based polymer is hydroxypropyl methylcellulose (HPMC).
• HPMC hydroxypropyl methylcellulose
• the tablet composition comprises 20-60 % hydroxypropyl methylcellulose, starch 10-30%, or any combination thereof.
• the tablet composition comprises an amount of ketamine therapeutically effective for the treatment of pain.
• the pain treated is cancer pain, e.g. , refractory cancer pain.
• the pain treated is post-surgical pain.
• the pain treated is orthopedic pain.
• the pain treated is back pain.
• the pain treated is neuropathic pain.
• the pain treated is dental pain.
• the pain treated is chronic pain in opioid- tolerant patients.
• the tablet composition comprises an amount of ketamine therapeutically effective for the treatment of depression.
• the tablet composition comprises an amount of ketamine therapeutically effective for the treatment of brain injury.
• the tablet composition comprises an amount of ketamine therapeutically effective for the treatment of stroke.
• the tablet composition comprises an amount of ketamine therapeutically effective for use in migraine, e.g. , with aura.
• the tablet composition comprises an amount of ketamine therapeutically effective for use in refractory asthma. In certain embodiments of the present invention, the tablet composition comprises an amount of ketamine therapeutically effective for use in treating alcohol dependence.
• the tablet composition comprises an amount of ketamine released from the matrix with a rate 0.05-2 mg/kg/h over a period of 12-24 hours, e.g., 24 hours.
• the neuro-attenuating ketamine achieves a combined concentration of ketamine and its metabolite norketamine in plasma in the range of 10-500 ng/ml, and maintains this concentration for duration of the release period.
• the neuro-attenuating ketamine achieves a combined concentration of ketamine and its metabolite norketamine in plasma in the range of 10-300 ng/ml, and maintains this concentration for duration of the release period.
• the neuro-attenuating ketamine achieves a combined concentration of ketamine and its metabolite norketamine in plasma in the range of 10- 100 ng/ml, and maintains this concentration for duration of the release period.
• the neuro-attenuating ketamine achieves a combined concentration of ketamine and its metabolite norketamine in plasma in the range of 10-20 ng/ml, and maintains this concentration for duration of the release period.
• the release period of the NAKET in the formulations of the invention is greater than 4 hours.
• the release period of the NAKET in the formulations of the invention is greater than 8 hours.
• the release period of the NAKET in the formulations of the invention is greater than 12 hours.
• the release period of the NAKET in the formulations of the invention is greater than 16 hours.
• the release period of the NAKET in the formulations of the invention is greater than 20 hours.
• the release period of the NAKET in the formulations of the invention is greater than (or equal to) 24 hours.
• the release period of the NAKET in the formulations of the invention is greater than (or equal to) 28 hours. In certain embodiments of the present invention, the release period of the NAKET in the formulations of the invention is greater than (or equal to) 32 hours.
• the release period of the NAKET in the formulations of the invention is greater than (or equal to) 36 hours.
• the release period of the NAKET in the formulations of the invention is less than 48 hours.
• the release period of the NAKET in the formulations of the invention is less than 36 hours.
• the tablet compositions of the present invention are utilized as a 2-times a day application.
• the tablet compositions of the present invention are utilized as a once a day application.
• the tablet compositions are enhanced.
• the formulation is able to utilize less ketamine for treatment to achieve the same effect as comparative tablets not described by the present invention.
• the oral administration event which provides the appropriate single unit dose, may comprise one single pill or multiple pills.
• enteric coating may be used in certain embodiments.
• single-layer tablet is coated with protective layers of inactive pharmaceutical ingredients, e.g. , to ensure steady release of the drug from the matrix and avoid concentration bursts at the early release time points.
• Another embodiment of the present invention provides formulation of ketamine that ensures the steady release of a therapeutically effective concentration of ketamine from an oral tablet without sedative or psychotomimetic toxic spikes in plasma ketamine concentration comprising ketamine formulated in an osmotic controlled release tablet.
• ketamine formulated in an osmotic controlled release tablet.
• a single core layer containing ketamine e.g. , as defined by other tablet formulations described herein
• semi-permeable membrane with or without drug delivery orifice.
• osmotic asymmetric-membrane technology or AMT i.e., technology directed to a single-layer tablet coated with an insoluble, asymmetric microporous membrane produced by controlled phase separation
• AMT i.e., technology directed to a single-layer tablet coated with an insoluble, asymmetric microporous membrane produced by controlled phase separation
• the present invention includes any composition described herein to comprise ketamine with reduced sedative and psychotomimetic side effects, wherein the ketamine is replaced by norketamine in equivalent amounts and forms, to produce tablet compositions comprising norketamine with reduced sedative and psychotomimetic side effects; and is equivalently useful in the methods and kits of the present invention.
• Such embodiments would include small variations that would be ascertainable by the ordinarily skilled artisan, in light of the descriptions provided herein.
• the ketamine or norketamine may be derivatized in any manner that does not significantly effect formulation as described herein for ketamine, or the ability of the ketamine/norketamine to achieve the desired therapeutic effects described herein, i.e. , with similar steady release of a therapeutically effective concentration (e.g., based on indication) of the ketamine derivative from an oral tablet without sedative or psychotomimetic toxic spikes in ketamine or ketamine derivative concentration.
• the ketamine or norketamine may be deuterated, e.g., as described in US Patent No. 7,638,651, which is incorporated herein by reference hereto (and which indicates that such derivatives are expected to behave similarly to ketamine, and achieve results similar to ketamine).
• the ketamine or norketamine may be formulated as a pharmaceutically acceptable salt thereof, e.g. , ketamine hydrochloride, ketamine aspartate, ketamine succinate, etc, such that the ketamine/norketamine counterion does not significantly effect formulation as described herein for ketamine/norketamine, or the ability of the ketamine/norketamine to achieve the desired therapeutic effects described herein, i.e. , with similar steady release of a therapeutically effective concentration (e.g., based on indication) of the ketamine derivative from an oral tablet without sedative or psychotomimetic toxic spikes in ketamine or ketamine derivative concentration.
• a therapeutically effective concentration e.g., based on indication
• Exemplary salts within this scope, may include but are not limited to: salts with an inorganic acid such as hydrochloric acid, hydrobromic acid, hydriodic acid, nitric acid, perchloric acid, sulfuric acid or phosphoric acid; and salts with an organic acid, such as methanesulfonic acid, trifluoromethanesulfonic acid,
• ethanesulfonic acid benzenesulfonic acid, p-toluenesulfonic acid, fumaric acid, oxalic acid, maleic acid, citric acid, succinic acid, tartaric acid; and other mineral and carboxylic acids well known to those skilled in the art.
• Additional examples may include salts with inorganic cations such as sodium, potassium, calcium, magnesium, lithium, aluminum, zinc, etc; and salts formed with pharmaceutically acceptable amines such as ammonia, alkylamines, hydroxyalkylamines, lysine, arginine, N-methylglucamine, procaine and the like.
• the pharmaceutically acceptable salt is a hydrochloride salt.
• the pain treated is cancer pain, e.g. , refractory cancer pain.
• the pain treated is post-surgical pain.
• the pain treated is orthopedic pain.
• the pain treated is back pain. In particular embodiments of the invention, the pain treated is neuropathic pain.
• the pain treated is dental pain.
• the pain treated is chronic pain in opioid- tolerant patients.
• Another embodiment of the present invention provides a kit for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of brain injury.
• NAKET neuro-attenuating ketamine
• kits for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of depression.
• NAKET neuro-attenuating ketamine
• kits for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of migraine, e.g. , with aura.
• NAKET neuro-attenuating ketamine
• kits for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of refractory asthma.
• NAKET neuro-attenuating ketamine
• kits for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of stroke.
• NAKET neuro-attenuating ketamine
• kits for the treatment of a subject with ketamine comprising a single-layer orally administered tablet composition of any one of formulations of the present invention comprising neuro-attenuating ketamine (NAKET), and instructions for use in the treatment of alcohol dependence.
• NAKET neuro-attenuating ketamine
• the instructions for use form an integrated component of the packaging for the tablet composition.
• compositions of the invention comprise orally administered tablet
• compositions which may include uncoated tablets or coated tablets (including film-coated, sugar-coated tablets, and gastro- resistant/enteric-coated tablets).
• Tablets for oral use may include the active ingredients, e.g. , ketamine, mixed with pharmaceutically acceptable inactive excipients such as diluents, disintegrating agents, binding agents, lubricating agents, powder flow improving agent, wetting agents, sweetening agents, flavoring agents, coloring agents and preservatives.
• tablets of the present invention are solid dosage forms intended for oral administration, e.g. , obtained by dry granulation with single or multiple compressions of powders or granules.
• the tablets may be obtained by using wet granulation techniques, in certain embodiments, the tablets may be obtained by molding, heating/annealing, or extrusion techniques.
• the tablets are right circular solid cylinders, the end surfaces of which are flat or convex, and the edges of which may be beveled.
• the surfaces are convex.
• they may have lines or break-marks (scoring), symbols or other markings.
• the break-mark(s) is/are intended to permit accurate subdivision of the tablet in order to provide doses of less than one tablet.
• the tablet compositions comprise one or more excipients such as diluents, binders, disintegrating agents, glidants, lubricants, substances capable of modifying the behavior of the dosage forms and the active ingredient(s) in the
• Coated tablets are tablets covered with one or more layers of mixtures of substances such as natural or synthetic resins, polymers, gums, fillers, sugars, plasticizers, polyols, waxes, coloring matters authorized by the appropriate national or regional authority, and flavoring substances.
• Such coating materials do not contain any active ingredient, e.g. , ketamine or norketamine.
• the tablets may be coated for a variety of reasons such as protection of the active ingredients from burst release from the matrix, air, moisture or light, masking of unpleasant tastes and odors or improvement of appearance.
• the substance used for coating may be applied as a solution or suspension.
• the manufacturing processes for tablets meet the requirements of good manufacturing practices (GMP).
• one or more measures are taken in the manufacture of tablets selected from the following: ensure that mixing with excipients is carried out in a manner that ensures homogeneity; ensure that the tablets possess a suitable mechanical strength to avoid crumbling or breaking on subsequent processing, e.g., coating, storage and distribution; minimize the degradation of the active ingredient; minimize the risk of microbial contamination; minimize the risk of cross-contamination.
• scored tablets tablettes bearing a break-mark or marks
• for which subdivision is intended in order to provide doses of less than one tablet measures are taken to: ensure the effectiveness of break-marks with respect to the uniformity of mass or content, as appropriate, of the subdivided parts so that the patient receives the intended dose.
• a suitable dose will be in the range of 0.01 to 10 mg per kilogram body weight of the recipient per day, preferably in the range of 0.1 to 5 mg per kilogram body weight per day. Additional details on techniques for formulation and administration are well described in the scientific and patent literature, see, e.g. , the latest edition of
• Remington's Pharmaceutical Sciences Maack Publishing Co, Easton Pa.
• a pharmaceutical composition After a pharmaceutical composition has been formulated in an acceptable carrier, it can be placed in an appropriate container and labeled for treatment of an indicated condition).
• labeling would include, e.g., instructions concerning the amount, frequency and method of administration.
• the formulations of the present invention conform to certain industry accepted monographs to afford compliance with the Federal Food Drug and Cosmetic Act.
• the formulations of the present invention conform and are considered acceptable under visual inspection, uniformity of mass analysis, uniformity of content analysis, and/or dissolution/disintegration analysis all of which are established by a relevant monograph.
• throughout manufacturing certain procedures are validated and monitored by carrying out appropriate in-process controls. These are designed to guarantee the effectiveness of each stage of production. In-process controls during tablet production may include the moisture content of the final lubricated blend, the size of granules, the flow of the final mixture and, where relevant, the uniformity of mass of tablet cores before coating.
• In-process controls during tablet production may also include the dimensions (thickness, diameter), uniformity of mass, hardness and/or crushing force, friability, disintegration or dissolution rate (for example, for modified- release tablets) of the finished dosage form. Suitable test methods that may be used to demonstrate certain of these attributes are known in the art.
• packaging is required to be adequate to protect the tablets from light, moisture and damage during transportation.
• the commercially available formulation e.g. , kit
• Such label includes: name of the pharmaceutical product;
• tablets are able to withstand handling, including packaging and transportation, without losing their integrity.
• the formulations of the invention may be used in the methods of the invention, e.g., methods of treatment of the invention.
• the invention relates to the method of use of formulations of the invention, which contain neuro-attenuating ketamine (NAKET), e.g. , for the treatment of pain.
• NAKET neuro-attenuating ketamine
• the invention provides for the management of different kinds of pain, including but not limited to refractory cancer pain, neurologic pain, postoperative pain, complex regional pain syndrome (CRPS), migraine, e.g., with aura, and other conditions including depression, alcohol dependence, refractory asthma, epilepsy, acute brain injury and stroke,
• Alzheimer' s disease and other disorders comprising an oral administration of the formulations of the present invention, described herein.
• the use of formulations of the present invention may be used as a standalone therapy.
• the use of formulations of the present invention may be used as an adjuvant/combination therapy.
• the invention provides for the management of different kinds of pain, including but not limited to cancer pain, e.g., refractory cancer pain;
• neuropathic pain opioid- induced hyperalgesia and opioid-related tolerance
• neurologic pain postoperative/post-surgical pain
• complex regional pain syndrome CRPS
• shock limb amputation; severe chemical or thermal burn injury; sprains, ligament tears, fractures, wounds and other tissue injuries; dental surgery, procedures and maladies; labor and delivery; during physical therapy; radiation poisoning; acquired immunodeficiency syndrome (AIDS); epidural (or peridural) fibrosis; orthopedic pain; back pain; failed back surgery and failed laminectomy; sciatica; painful sickle cell crisis; arthritis; autoimmune disease; intractable bladder pain; pain associated with certain viruses, e.g. , shingles pain or herpes pain; acute nausea, e.g.
• viruses e.g. , shingles pain or herpes pain
• acute nausea e.g.
• the present invention includes the following components: pain that may be causing the nausea or the abdominal pain that frequently accompanies sever nausea; migraine, e.g., with aura; and other conditions including depression (e.g., acute depression or chronic depression), depression along with pain, alcohol dependence, acute agitation, refractory asthma, acute asthma (e.g., unrelated pain conditions can induce asthma), epilepsy, acute brain injury and stroke, Alzheimer's disease and other disorders.
• depression e.g., acute depression or chronic depression
• depression along with pain
• alcohol dependence e.g., acute agitation, refractory asthma, acute asthma (e.g., unrelated pain conditions can induce asthma)
• epilepsy e.g., unrelated pain conditions can induce asthma
• epilepsy e.g., unrelated pain conditions can induce asthma
• the present invention includes the following conditions including the following conditions including depression (e.g., acute depression or chronic depression), depression along with pain, alcohol dependence, acute agitation, refractory asthma, acute asthma
• the pain treated/managed is acute breakthrough pain or pain related to wind-up that can occur in a chronic pain condition.
• the pain treated/managed is cancer pain, e.g. , refractory cancer pain.
• the pain treated/managed is post- surgical pain.
• the pain treated/managed is orthopedic pain.
• the pain treated/managed is back pain. In particular embodiments of the invention, the pain treated/managed is neuropathic pain.
• the pain treated/managed is dental pain.
• the condition treated/managed is depression.
• the pain treated/managed is chronic pain in opioid- tolerant patients.
• the invention provides a method of treating a subject with ketamine comprising the step of administering to a subject a single-layer orally administered tablet composition, e.g. , matrix composition, of the present invention comprising neuro-attenuating ketamine (NAKET), such that the subject is treated.
• a single-layer orally administered tablet composition e.g. , matrix composition
• NAKET neuro-attenuating ketamine
• the administering physician can provide a method of treatment that is prophylactic or therapeutic by adjusting the amount and timing of NAKET administration on the basis of observations of one or more symptoms of the disorder or condition being treated.
• the invention provides a method of continuous oral administration of ketamine comprising the steps of formulating ketamine into a single- layer tablet that provides a steady release of a therapeutically effective concentration of ketamine from an oral tablet over a complete release period with neurologically toxic spikes, e.g., no sedative or psychotomimetic toxic spikes in plasma ketamine
• NAKET neuro-attenuating ketamine
• the subject is a mammal.
• the mammal is a human.
• the present invention provides a method of formulating ketamine to ensure the steady release of a therapeutically effective concentration of ketamine from an oral tablet without neurologically toxic spikes, e.g., sedative or psychotomimetic toxic spikes, in plasma ketamine concentration.
• the method comprises the step of combining (i) a water-insoluble neutrally charged non-ionic matrix; (ii) a polymer carrying one or more negatively charged groups; and (iii) ketamine, to produce a neuro-attenuating ketamine single-layer orally
• the method comprises the step of combining (i) polyethylene oxide (PEO), e.g. , MW 2,000 to 7,000 KDa, with HPMC, and (ii) ketamine, to produce a neuro-attenuating ketamine single-layer orally administered tablet composition.
• PEO polyethylene oxide
• the tablet composition may further comprise polyethylene glycol (PEG), e.g. , PEG 8K., a polymer carrying one or more negatively charged groups, e.g. , polyacrylic acid and/or may be further subjected to heating/annealing, e.g. , extrusion conditions.
• the formulations of the invention may be administered in combination with other active therapeutic agents, e.g. , opioids to reduce pain.
• the formulations of the present invention serve to reduce the amount of opioids necessary to treat a patient.
• the formulations of the invention are not administered in combination with other active therapeutic agents.
• the formulations of the invention may be administered in combination with another formulation of ketamine, e.g., a fast release formulation of ketamine.
• the present invention provides a method of formulating ketamine to ensure the steady release of a therapeutically effective concentration of ketamine from an oral tablet without sedative or psychotomimetic toxic spikes in plasma ketamine concentration comprising formulation of ketamine in an osmotic controlled release tablet.
• the single core layer containing ketamine is surrounded by semi-permeable membrane with or without drug delivery orifice.
• combination with the novel and inventive NAKET tablet formulations of the present invention and osmotic asymmetric-membrane technology or AMT may be used to produce formulations useful in the methods and kits described herein.
• Ketamine was formulated into a controlled release tablet form, composition KTM- 1, by dry granulation using a controlled release matrix based on a combination of hydroxypropyl methyl cellulose (HPMC) Methocel KM 100 CR and pre- gelatinized starch Starch 1500.
• HPMC hydroxypropyl methyl cellulose
• Methocel, Starch 1500, ketamine and Cab-o-Sil were coarsely mixed and passed through a 40-mesh screen to break-up agglomerates.
• Microcrystalline cellulose was then added and the mixture blended in a 100 ml tube blender for 15 minutes at 200 rev/min.
• the full composition of ketamine tablet KTM-1 is presented in Table 1.
• ketamine released was measured by HPLC using an Agilent 1100 setup and UV detection at 210 nm.
• a 20 microliter sample volume was injected onto a Zorbax SB-Phenyl column, 4.6x150 mm, 5 microns, using as the mobile phase a mixture of 70 % ammonium acetate (10 mM) and 30 % acetonitrile; flow rate 1.5 ml/min; column temperature 40°C. Solutions of known concentrations of ketamine were used to calculate the amount of drug released.
• Ketamine was formulated into a tablet form by dry granulation following the general procedure as described in the Example 1.
• the control formulation KTM-1 presented in Table 1 was supplemented by adding polyacrylic acid, Carbopol 974 NF (Noveon), for a total content of 16.7 % and 9.1 % to make compositions KTM-2 and KTM-3, respectively (See Table 1).
• KoUidon SR polyvinylacetate/Povidone based polymer
• It consists of 80% Polyvinylacetate and 19% Povidone in a physical mixture, stabilized with 0.8% sodium lauryl sulfate and 0.2% colloidal silica.
• KoUidon SR possesses good compressibility and typically displays drug release profile independent of the dissolution medium (pH and salt/ion content).
• a 200 mg tablets containing 20 mg of ketamine was produced using protocol similar to Example 2, with a mixture of KoUidon SR and microcrystalline cellulose to produce formulation KTM-11.
• the tablet composition is presented in the Table 2.
• the tablets displayed a good hardness, in the range of 15-20 kP, and released 56 % of the drug at 10 hours and 78 % at 24 hours, with full release expected to be between 36 and 48 hour time points (Figure 2).
• Glyceryl behenate (Compritol ® , 888 ATO, Gattefosse) is a hydrophobic fatty acid ester of glycerol which may be used as a lipophilic matrix-forming agent in the manufacture of sustained-release tablets. When compressed, it forms an insoluble network structure, allowing dissolution fluid to gradually penetrate and subsequent diffusion-controlled drug release to occur through matrix channels and pores. Unlike hydrophilic matrix systems, which utilize swellable polymers such as HPMC and rely on diffusion and erosion mechanisms, drug release from insoluble matrix systems is dependent on the rate and extent of water permeation and the aqueous solubility of the drug embedded in the matrix.
• the 200 mg tablets containing 20 mg of ketamine were produced using a mixture of Compritol (20 ), dibasic calcium phosphate and lactose (formulation KTM-9).
• the tablets display a relatively low hardness, in the range of 6-7 kP, and release 92 % of the drug in 8 hour.
• Addition of about 10 % of polyacrylic acid (formulation KTM-12) leads to slowed release, 65 % at 10 hour and 92 % at 24 hour time points.
• PEO Polyethylene oxide
• HPMC HPMC
• PEO-based formulations may be produced by dry granulation as well by melt extrusion, producing solid dispersions of the active pharmaceutical ingredients.
• thermoplastic polymer PEO has glass transition temperatures in the range of 80-100 °C (depending on the molecular weight; the grade used for extended release formulation are typically within 900-7,000 KDa M average molecular weight) and could be melted during the extrusion process, solubilizing the drugs.
• the 220 mg tablets containing 20 mg of ketamine were produced by dry granulation using a mixture of two different grades of PEO (MW 2,000 and 7,000 KDa), in combination with HPMC (formulations KTM-13, 14, respectively).
• the release properties were explored upon changing the following additional variables in the composition and processing: i) Molecular weight of PEO; (ii) Addition of polyacrylic acid as a prototypical acidic ingredient, described herein as a potential to slow down the release (formulation KTM-15); (iii) Addition of the high molecular weight PEG 8K (formulation KTM-16); (iv) annealing of the tablets for 20 min in the oven at 120 °C to mimic the mechanical properties achieved by extrusion (formulation KTM-15a).
• the tablets displayed a relatively high hardness, in the range of 15-20 kP that increases upon annealing to 30-35 kP, indicative of acquiring tamper-resistance properties enabled by improved crush resistance.
• Ketamine and norketamine were quantified in plasma using LC/MS/MS method (Agilent 1200/AB SCIEX 4000 QTRAP instrumental setup) following the general procedure as described by Nettoa et al. (Biomed. Chromatogr., 2011); using the related analytical standards of ketamine and norketamine purchased from Sigma- Aldrich.
• any numerical or alphabetical ranges provided herein are intended to include both the upper and lower value of those ranges.
• any listing or grouping is intended, at least in one embodiment, to represent a shorthand or convenient manner of listing independent embodiments ⁇ e.g., such as particular pain indications); as such, each member of the list should be considered a separate embodiment.

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