WO2005063267A1 - Comprime oral desintegrable de feuilles de ginkgo - Google Patents

Comprime oral desintegrable de feuilles de ginkgo Download PDF

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Publication number
WO2005063267A1
WO2005063267A1 PCT/CN2004/001580 CN2004001580W WO2005063267A1 WO 2005063267 A1 WO2005063267 A1 WO 2005063267A1 CN 2004001580 W CN2004001580 W CN 2004001580W WO 2005063267 A1 WO2005063267 A1 WO 2005063267A1
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Prior art keywords
ginkgo biloba
orally disintegrating
disintegrating tablet
extract
tablet according
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PCT/CN2004/001580
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English (en)
French (fr)
Inventor
Haisong Jiang
Jingang Wang
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Beijing Kexin Bicheng Medical Technology Development Co., Ltd.
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Publication of WO2005063267A1 publication Critical patent/WO2005063267A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K36/00Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
    • A61K36/16Ginkgophyta, e.g. Ginkgoaceae (Ginkgo family)
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/0012Galenical forms characterised by the site of application
    • A61K9/0053Mouth and digestive tract, i.e. intraoral and peroral administration
    • A61K9/0056Mouth soluble or dispersible forms; Suckable, eatable, chewable coherent forms; Forms rapidly disintegrating in the mouth; Lozenges; Lollipops; Bite capsules; Baked products; Baits or other oral forms for animals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • A61P9/10Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis

Definitions

  • the present invention relates to a ginkgo biloba orally disintegrating tablet, which can be used to treat cardiovascular and cerebrovascular diseases, especially coronary heart disease, angina pectoris, acute cerebral infarction, and cerebral arterial stiffness or cerebral circulation disorders.
  • the invention also relates to a method for preparing the ginkgo biloba orally disintegrating tablet. Background technique
  • Ginkgo biloba is also known as Ginkgo biloba.
  • Ginkgo biloba was first used in the Ming Dynasty. It was recorded for the treatment of lung deficiency, asthma, and heart diseases. At present, it is mostly used in the treatment of cardiovascular and cerebrovascular diseases, asthma, and peripheral blood vessels.
  • most ginkgo biloba extracts have been used as raw materials, and modern formulation technologies have been used to make a variety of different dosage forms for the convenience of patients and medical workers.
  • Ginkgo biloba extract (Extract of Ginkgo bi loba) has many chemical components.
  • EGb mainly contains 24% flavonoid glycosides and 6% total lactones.
  • flavonoid glycosides include quercetin, kaempferol and isorhamnetin; total lactones include ginkgolides A, B, C, M, J and ginkgolides.
  • EGB also has 17 kinds of amino acids and trace elements such as Ca 2 ⁇ Mg 2 ⁇ P, Sr, Fe, and its pharmacological effects are as follows:
  • Ginkgolides are natural PAF receptor antagonists in EGb. Among them, Ginkgolide B has the strongest activity. Dong Jingcheng et al. Demonstrated that the addition of platelet activating factor (PA) to platelet incubation solution can cause strong contraction of tracheal strips in vitro and reduce the number of P-adrenergic receptors in lung tissue. After pretreatment with ginkgolide, it can antagonize PAF This effect relaxes the bronchi and thus treats asthma. Fang Enwei and others found that blood PAF increased in gerbil bilateral carotid artery ligation ischemia-reperfusion injury model. Ginkgolide administration could significantly reduce blood PAF. Reduce ischemic brain damage, reduce infarct size, and reduce cerebral edema.
  • EGB can increase the muscarinic choline receptors in the hippocampus of rats, and increase the renewal of norepinephrine in the rat cortex, which can improve and promote the efficacy of learning and memory.
  • EGb and its lactones can also protect mouse neurons from glutamate damage, prevent glutamate-induced increase in Ca 2 + influx, and reverse the glutamate-induced hypothalamic arcuate neuron nucleus area ⁇ ⁇ Reduction.
  • Ginkgo biloba extract has good effects in the treatment of many diseases.
  • Cardiocerebral vascular disease Ginkgo biloba extract (EGb) has good effects on coronary heart disease and angina pectoris, hypertension, hypotension, and hyperlipidemia. It is mainly used in the treatment of cerebral vasospasm, senile cerebrovascular disease, senile dementia, and sequelae of traumatic brain injury. Clinical application has confirmed that its effective rate can reach more than 90%.
  • Respiratory diseases Geng Zhiguang et al. Used Ginkgo biloba to treat 30 patients with asthma in remission. After treatment, compared with the control group, the airway hyperresponsiveness and lung function of the treatment group were significantly improved, and the difference was significant. It was confirmed that Ginkgo biloba extract can significantly reduce airway hyperresponsiveness in asthmatic patients and improve lung function. Asthma prevention has positive significance.
  • Urinary system disease Ginkgo biloba extract can improve 1 cycle, reduce the infiltration of inflammatory cells, reduce the production of cytokines and improve kidney damage. According to reports, Yang Wenqing and other 31 patients with diabetic nephropathy treated with ginkgo biloba capsules confirmed that patients with blood glucose 24h urine protein, blood P2-MG, Bun, Cr and other indicators have improved significantly after treatment.
  • ginkgolide B has enhanced the sensitivity of cancer cells to chemotherapeutic agents, can be used for the treatment of metastatic cancer, and has a certain effect on EB virus.
  • EGb has a significant anti-deficient effect, and intermittent claudication for peripheral circulatory disorders also has therapeutic value [1] .
  • oral solid immediate-release preparations have become a hot spot in the development of new drugs in recent years, especially orally disintegrating tablets, which have become the focus of tablet development due to their convenient taking, fast onset, high bioavailability, and good taste.
  • Orally disintegrating tablets are tablets that do not require ice or require a small amount of water and do not need to chew. The tablets are placed on the tongue. After the saliva quickly dissolves or disintegrates, the medicine can be taken into the stomach by swallowing power. Orally disintegrating tablets are characterized by fast absorption, high bioavailability, less intestinal residues, and low side effects. Therefore, orally disintegrating tablets are suitable for drugs that require rapid onset of action and have a large difference between the effective concentration and the poisoning concentration.
  • Injury and emergency medicines, non-steroidal anti-inflammatory drugs, antispasmodic and antiemetics, and analgesics are more suitable for making orally disintegrating tablets.
  • some drugs, such as the blood concentration are relatively stable for a long time, which is prone to drug resistance. Orally disintegrating tablets can overcome this problem and produce a good therapeutic effect.
  • Oral disintegrating tablets do not need to be fed with water.
  • Saliva can disintegrate or dissolve them. They can be swallowed as ordinary tablets, or they can be taken after disintegration in water, or they can be taken without swallowing. In particular, it provides convenience for the elderly, children, those who have difficulty swallowing or who have difficulty in taking water. If certain methods are used to improve the taste during preparation, it can greatly improve the compliance of children with medication and solve the problem of difficult medication for infants and young children [4] .
  • the purpose of the present invention is to make up for the shortcomings of the existing ginkgo biloba extract preparation technology, and provide a wide range of patients and medical workers with a fast absorption, high bioavailability, less intestinal residues, low side effects, and no need to drink water. It only takes tens of seconds to quickly disintegrate or dissolve. With the swallowing of saliva, the genital apricot leaf oral disintegration tablet and its preparation method can be completed to meet the growing needs in the medical field. Summary of the invention
  • the present invention provides, in one aspect, a silver preparation leaf orally disintegrating tablet preparation, which comprises a ginkgo biloba extract and a filler, a disintegrant, a flavoring agent, a glidant, a lubricant, a scallion or a coating material, and Optional effervescent.
  • the present invention provides a method for preparing orally disintegrating tablets. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic diagram showing the dissolution of the samples in Examples 1 to 4 using rutin as a dissolution evaluation index. detailed description
  • the present invention provides a ginkgo biloba orally disintegrating tablet, which comprises the following ingredients:
  • Emu or coating material 0-60%, 8. Effervescent 0 ⁇ 30%.
  • the Ginkgo biloba extract used as a raw material is a raw material drug in the prior art, which is defined in the National Pharmacopoeia as follows: "This product is made from the dried leaves of the Ginkgo biloba plant Ginkgo bilobaL. "Extract", containing no less than 24.0% total brassinoside; no less than 6.0 ° / containing terpenoid lactones. .
  • Ginkgo biloba extract may be used in the present invention are commercially available from numerous manufacturers or can be prepared by various known methods, including for example solvent extraction, supercritical C0 2 extraction method, extraction HSCCC, And cell and tissue culture synthesis methods (West China Journal of Pharmacy 2002, 17 (6): 437-439).
  • the content of 4 Burgundy Apricot leaf extract is within 15 - 40% by weight, more preferably 20 - 35 wt 0 /
  • the filler may be any type known in the art, including but not limited to mannitol (granular or powdered), xylitol, sorbitol, maltose, erythritol, microcrystalline cellulose, PR0S0LV® SMCC, polymeric sugar (EMDEX®), coupling sugar, glucose, lactose, sucrose, dextrin and starch, etc. They can be used alone or in any combination.
  • the content of the filler in the apricot leaf orally disintegrating tablet of the present invention is preferably 20 to 60% by weight, and more preferably 35 to 60% by weight.
  • the disintegrant can be of any type known in the art, including, for example, cross-linked polyvinyl pyrrolidone (PPVP), sodium carboxymethyl starch (CMS-Na), and low-substituted hydroxypropylmethyl fibers Any one of L-HPC, croscarmellose sodium (CCNa), or any combination thereof.
  • the content of the disintegrant is preferably 5 to 25%, more preferably 10 to 20% by weight.
  • the flavoring agent may be any type known in the art, including but not limited to mannitol, xylitol, stevioside, lactose, fructose, sucrose, proteose, maltitol, glycyrrhizin, Sodium cyclohexylsulfamate, gelatin, aspartam, banana flavor, pineapple flavor, vanillin, orange flavor, orange flavor, mint flavor, ginseng flavor, strawberry flavor, citric acid, pestic acid, etc. They can be used alone or in any combination.
  • the content of the flavoring agent is preferably 0.5 to 30% by weight, and most preferably 0.5 to 10% by weight.
  • the glidant may be of any type known in the art, including, for example, micronized silica gel, talc, Cab-0-sil, Arosil, 7j sodium aluminosilicate, or any combination thereof.
  • the content of the glidant is preferably from 0.1 to 4% by weight, more preferably from 0.5 to 3%, and more preferably from 0.5 to 2.0%.
  • the lubricant may be any type known in the art, including, for example, any one of magnesium stearate, magnesium dodecyl sulfate, talc, or the like, or Any combination of them.
  • the content of the lubricant is preferably 0.5 to 2.8% by weight, and more preferably 1 to 2.5%.
  • linden or coating material is an optional auxiliary material.
  • They can be of any type known in the art, including, for example, gelatin, acacia, alginate, chitosan, carboxymethyl cellulose salts, cellulose acetate phthalate, ethyl cellulose, amidine fibers Cellulose, hypromellose, acrylic resin (domestic acrylic resins I, II, III, IV, Eudrag it® series), polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, etc., or any of them Any combination.
  • the content of the sedge wood or the coating material is preferably 20 to 60% by weight, more preferably 30 to 60%, and most preferably 40 to 60%.
  • an effervescent agent is also an optional adjuvant, and may be any type known in the art, including, for example, a mixture of citric acid or citric acid and sodium bicarbonate or sodium carbonate.
  • the content of the effervescent agent is preferably 5 to 25% by weight, and more preferably 10 to 20%.
  • the invention also relates to a method for preparing the ginkgo leaf extract orally disintegrating tablet, comprising the following steps: (1) weighing the flavoring agent with the ginkgo leaf extract or the taste-masked ginkgo leaf extract raw material particles according to the amount Take it and mix it for future use;
  • the applied L apricot leaf extract can be directly mixed with a flavoring agent without treatment.
  • the following pretreatment can be performed on the ginkgo leaf extract before mixing it with the flavoring agent to pre-mask the strong bitterness of the ginkgo leaf extract:
  • micro-puppets cover the taste one by one, take the selected pupae, dissolve and dilute with distilled water To the appropriate concentration, such as 1-10w / v%, preferably 2-8w / v%, more preferably 3-5w / v%, and then add a glidant and mix it, and then suspend it with ginkgo leaf extract by vertical airflow The air suspension method is then used to prepare the micro centipede, and the obtained ginkgo biloba extract powder is coated with micro centipede granules and dried for later use; or
  • Powder coating taste masking Take one by one the selected coating material, dissolve it with a suitable solvent such as ethanol, aqueous ethanol solution, acetone, etc., and dilute it to an appropriate concentration, such as 1-10w / v%, preferably 2- 8w / v%, more preferably 3-5w / v%, ready for use.
  • a suitable solvent such as ethanol, aqueous ethanol solution, acetone, etc.
  • concentration such as 1-10w / v%, preferably 2- 8w / v%, more preferably 3-5w / v%, ready for use.
  • the ginkgo biloba extract was placed in an ebullating bed to boil, and then the solution was sprayed into the powder coating to obtain the ginkgo biloba extract powder coated particles, which were dried and sieved.
  • the spray speed can be determined by conventional methods depending on the specific equipment used. These are all within the skill of those of ordinary skill in the art.
  • the preparation method of the ginkgo biloba oral disintegrating tablet mentioned in the present invention is a direct compression method, which can be adopted by any manufacturer having a conventional tablet.
  • the apricot leaf orally disintegrating tablet of the present invention can be used to treat diseases of the cardio-cerebral system, such as coronary heart disease, angina pectoris, acute cerebral infarction, and cerebral arteriosclerosis or cerebral circulation disorders.
  • the dosage can be varied within a wide range according to the following known factors, such as: the type of disease to be treated, the severity of the disease, the weight of the patient, the route of administration chosen, and the number of administrations per day. However, the optimal amount can be easily and routinely determined by the clinician.
  • pharmaceutical preparations in the prior art see for example "Remington Pharmaceutical Sciences, (1985)” or Remington: Pharmaceutical Sciences and Practice, 19th edition, 1995.
  • the present invention relates to a method for treating, relieving or preventing a central brain system disease in an individual, such as coronary heart disease, angina pectoris, acute cerebral infarction, and cerebral arteriosclerosis or cerebral circulation disorder, etc., comprising administering to the individual an effective amount of the present invention Ginkgo biloba extract orally disintegrating tablet preparation.
  • a central brain system disease such as coronary heart disease, angina pectoris, acute cerebral infarction, and cerebral arteriosclerosis or cerebral circulation disorder, etc.
  • the term "individual” refers to any animal, preferably a mammal, especially a human, to which ginkgo biloba extract can be applied.
  • Specific individuals for treatment include humans and non-human primates, sheep, horses, cows, goats, pigs, dogs, cats, rabbits, guinea pigs, hamsters, gerbils, rats, and rats.
  • the total weight is 200g, made into a total of 1000 tablets, and the content of Ginkgo biloba extract is 20%.
  • the first step is to take ginkgo biloba extract (Egb), aspartame and mint flavor, pass through a 40 mesh sieve, and mix well to obtain the flavored ginkgo biloba extract raw materials for use;
  • the second step is to take microcrystalline cellulose, citric acid, sodium bicarbonate, mannitol, micronized silica gel, and cross-linked polyvinylpyrrolidone through a 40-mesh sieve, mix well, add the flavored raw materials and mix well, and finally add Magnesium stearate is not uniform;
  • the third step is to measure the content of intermediates. After determining the tablet weight, send it to the tablet press to get the tablet.
  • Example 2 Prefabricated micro-taste masking method
  • gelatin and polyethylene glycol are mixed with water to make a certain concentration of solution, and then micronized silica gel is added and mixed.
  • the second step is to take the ginkgo biloba extract and suspend it in a vertical air stream, and then prepare it by air suspension method.
  • the obtained ginkgo biloba extract powder is coated with micro-granule particles, dried, and passed through a 0.5-leg sieve, ready for use;
  • mannitol, micronized silica gel, croscarmellose sodium, stevioside and ginseng flavor are mixed and mixed, and then mixed with the sieved micro-sacrifice to make it uniform, and magnesium stearate is added to make it uniform;
  • the fourth step is to detect the content of intermediates. After determining the tablet weight, send it to a tablet press to obtain tablets.
  • Example 3 Taste masking by powder coating
  • Raw materials ginkgo biloba extract 40g;
  • the total weight is 200g, made into a total of 1000 tablets, and the content of Ginkgo biloba extract is 20%.
  • ethyl cellulose, Eudrag it® E100 and Eudrag it® NE30D are dissolved with 95% ethanol and diluted to a certain concentration for later use;
  • the ginkgo biloba extract was placed in an ebullating bed and boiled, and the solution was sprayed into the solution at a certain speed for powder coating to obtain ginkgo biloba extract powder-coated granules, which were dried and passed through a 0.6 mm sieve, and set aside.
  • mannitol, micronized silica gel, cross-linked polyvinylpyrrolidone, aspartame and orange flavor are mixed and mixed, then mixed with the coated particles after sieving, and finally magnesium stearate is added and mixed.
  • the fourth step is to detect the content of intermediates. After determining the tablet weight, send it to a tablet press to obtain tablets.
  • Example 4 Taste masking by powder coating
  • Raw materials ginkgo biloba extract 40g;
  • Lubricant-magnesium stearate 2.5 g
  • Binder-sodium carboxymethyl starch 2.0 g
  • the first step Eudragit® E100, Eudrag it® NE 3 0D and ethyl cellulose are dissolved in an appropriate amount of ethanol and stirred well to dissolve. After adding 0.2% of the fine powder silica gel, keep stirring to evenly suspend the fine powder silica gel as Spade
  • the second step is ginkgo biloba extract and 2% micronized silica gel: mix well, place in a fluidized bed, and prepare ⁇ by air suspension method;
  • the third step is to prepare 5% glue slurry with sodium carboxymethyl starch with water as a binder.
  • the fourth step is to mix the ginkgo biloba extract, citric acid and orange flavor through a 60-mesh sieve. Granulation, sieving through 40 mesh, drying, spare;
  • mannitol is sieved through a 60 mesh sieve.
  • the sixth step is to fully mix the ginkgo leaf extract particles and mannitol particles, add cross-linked polyvinylpyrrolidone, low-substituted hydroxypropyl cellulose, aspartam and micronized silica gel, mix well, and add stearic acid. Content to determine tablet weight;
  • dissolution test method (Chinese Pharmacopoeia 2000 edition, Appendix XC, second method)
  • 900 ml of hydrochloric acid solution (prepared by diluting 9 ml of concentrated hydrochloric acid to 100 ml) is used as a solvent, and the rotation speed is 50 revolutions per minute.
  • the rotation speed is 50 revolutions per minute.
  • Add the dissolution medium dilute 9ml concentrated hydrochloric acid to 1000ml hydrochloric acid solution) and dilute to the mark.

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Description

银杏叶口腔崩解片及其制备方法 技术领域
本发明涉及一种银杏叶口腔崩解片, 其可用于治疗心脑血管 系统疾病, 尤其是冠心病、 心绞痛、 急性脑梗塞, 以及脑动脉硬 化或脑循环障碍等。 本发明还涉及所述银杏叶口腔崩解片的制备 方法。 背景技术
银杏叶又称白果叶, 银杏叶入药始于明代, 据记载用于治疗 肺虚咳喘及心脏疾患, 目前临床上多用于心脑血管疾病、 哮喘、 外周血管等疾病的治疗。 近年来大多以银杏叶提取物作为原料, 采用现代制剂技术制成各种各样的不同剂型, 以方便广大患者和 医务工作者使用。
银杏叶提取物(EGb) ( Extract of Ginkgo bi loba ) 的化学成 分种类较多。 EGb主要含有 24%的黄酮甙和 6%的总内酯。 其中黄 酮甙包括槲皮素、 山柰酚和异鼠李素等; 总内酯包括银杏内酯 A、 B、 C、 M、 J和白果内酯等。此外 EGb还有 17种氨基酸和 Ca2\ Mg2\ P、 Sr、 Fe等微量元素, 其药理作用如下:
1.拮抗血小板活化因子, 抑制血小板聚集 EGb 中银杏内酯 是天然的 PAF受体拮抗剂, 其中以银杏内酯 B活性最强。 董竟成 等人证实将血小板活化因子(PA)加入血小板孵化液后能引起离体 气管条强烈收缩,使肺组织 P -肾上腺受体的数量减少; 先用银杏 内酯预处理后, 则能拮抗 PAF的这种作用, 舒张支气管, 从而治 疗哮喘。 方恩伟等人在沙土鼠双侧颈总动脉结扎缺血再灌注损伤 模型中发现血 PAF增高, 给予银杏内酯后可明显降低血 PAF, 从 而减轻缺血性脑损伤, 缩小梗塞范围, 减轻脑水肿。
2.抗氧化消除氧自由基 银杏黄酮类有显著的消除氧自由基, 调节多种抗氧化酶活性并有直接抗氧化作用。 Kose等将不同浓度 的 4艮杏叶提取物加入健康人红细胞悬液中, 然后加入过氧化氢造 成损伤, 发现 EGb可减少膜脂质过氧化丙二醛的生成, 并呈时间 和剂量依赖性, 结果还显示 EGb的抗氧化作用强于水溶性抗氧化 剂(维生素 C、 谷胱甘肽等), 与脂溶性的抗氧化(生育酚)作用相 似。
3.扩张血管 李旭光等人实驗证实 EGb有抑制血管紧张素转 化酶(ACE)的作用,使血管紧张素生成减少, 醛固酮及儿茶酚胺分 泌减少, 故有扩张心脑血管、 外周血管、 降低血管阻力的作用。
4.降血脂,减少病理性红细包积聚,显著改善血液流变学异常 耿秀芳用 EGb总黄酮给大白鼠腹腔注射后 40d,血清甘油三酯含量 明显降低(P< 0. 05)、 赵中杰等实驗证实 EGb中的 量元素也能改 善动脉粥样硬化患者脂质代谢。
5.对神经系统的作用 EGb 能使大白鼠海马区的毒蕈碱胆碱 受体增加, 并使大鼠皮层区去甲腎上腺素的更新增加, 能改善和 促进学习记忆的功效。 EGb 及其内酯还能保护小鼠神经元对抗谷 氨酸的损伤, 阻止谷氨酸诱发的 Ca2 +内流的升高, 并逆转谷氨酸 诱导的下丘脑弓状神经元核面积^ ί减少。
6.其它作用 周本宏认为 EGb 有直接松弛气管平滑肌的作 用。 渊宇政临床试脸证实 EGb有克疫调节作用, 可提高血清免疫 球蛋白含量, 使外周血 T淋巴細胞 CD3+/CD4 +比值升高。 Mukhtar 等发现 EGb能抑制 B [a] P代谢和 B [a] ponA加成物形成,有抗癌作 用。 Braquet报道 EGb中银杏内西旨 B有抗过敏作用。
银杏叶提取物在众多疾病的治疗中具有艮好的效果。 1.心脑血管疾病 银杏叶提取物(EGb)对冠心病及心绞痛、高 血压、 低血压、 高血脂等均有良好疗效。 临床主要应用于治疗脑 血管痉挛、 老年脑血管病、 老年性痴呆、 脑外伤后遗症等。 临床 应用证实, 其有效率可达 90%以上。
2.呼吸系统疾病 耿志广等用银杏叶片 疗緩解期哮喘患者 30例。 用药后治疗组与对照组相比其气道高反应性, 肺功能有明 显改善, 差异有显著性, 证实银杏叶提取物能显著降低哮喘患者 的气道高反应性, 并改善肺功能, 对哮喘防治有积极意义。
3.泌尿系统疾病 银杏提取物(EGb)可改善1 循环,减轻炎症 细胞浸润,减少细胞因子的产生从而改善肾损害。 据报道,杨文青 等用银杏叶胶嚢治疗糖尿病肾病 31例,证实患者血糖 24h尿蛋白, 血 P 2-MG、 Bun, Cr等指标治疗后均改善显著。
4.消化系统疾病 李薇用复方银杏叶冲剂治疗乙肝 86例,亦 证实银杏叶具有改善肝微循环, 减轻其纤维化的作用。 有报道银 杏丙酯对胃溃疡也有一定保护作用。
5.其它 应用西德一项研究发现银杏内酯 B有增强癌细胞对 化疗剂的敏感性,可用于转移性癌症的治疗,对 EB病毒也有一定 作用。 EGb 具有显著的抗缺 效果, 对外周循环障碍疾病的间歇 性跛行也有治疗价值 [1]
现有的银杏叶提取物制剂有注射液以及多种传统的口服制 剂。
但是, 由于制备技术等原因, 使大多数口服制剂服用后存在 着溶散时限长、 溶出度低、 吸收较差和生物利用度较低等问题, 从而影响药效的发挥, 也直接影响着治疗的效果。 另外, 传统的 口服制剂在服用时需要大量的水送下, 这使得许多老年人、 婴幼 儿或者吞咽困难、 取水不便的患者难以 ^J¾。 注射液又往往容易产生过敏反应或不良反应等 [23] , 同时注 射液还存在着操作难度大, 患者痛苦也大, 制造和医疗成本高, 患者经济负担重的缺点。 因此, 有必要制备服用更加方便的剂型 以满足临床治疗和家庭使用的多种需要。
为此, 口服固体速释制剂成为近年新药研发的一个热点, 特 别是口腔崩解片, 因其服用方便、 起效快、 生物利用度高、 口感 好而成为片剂开发的重点。
口腔崩解片是指不需用氷或只需少量水, 无需咀嚼, 片剂置 于舌面, 遇唾液迅速溶解或崩碎后, 借吞咽动力, 药物即可入胃 起效的片剂。 口腔崩解片的特点是吸收快、 生物利用度高, 肠道 残留少, 副作用低, 因此, 口腔崩解片适用于需急速起效, 且有 效浓度与中毒浓度相差较大的药物, 一些战伤急救药、 非甾体抗 炎药、 解痉止吐药及镇痛药等都比较适合制成口腔崩解片。 另外 一些药物如血药浓度长期处于较平稳状态, 则易产生耐药性, 制 成口腔崩解片则可克服此问题, 产生良好的治疗效果。
口腔崩解片不必用水送 I艮, 唾液即可使其崩解或溶解, 既可 按普通片剂吞服, 又可放于水中崩解后送服, 还可不需用水吞咽 服药。 尤其为老人、 小儿、 吞咽困难或取水不便者服药提供了方 便, 如果在制备时采用一定的方法改善其口感, 则可大大提高儿 童患者的服药依从性, 解决婴幼儿服药难的问题 [4]
但是, 对于银杏叶提取物制剂, 目前还没有可供使用的口腔 崩解片剂型。 本发明的目的在于弥补现有银杏叶提取物制剂制备 技术的不足, 向广大患者和医务工作者提供一种吸收快、 生物利 用度高, 肠道残留少, 副作用低, 且不必饮水, 在口腔中仅需几 十秒即可迅速崩解或溶解, 随唾液下咽即可完成月艮药的 艮杏叶口 腔崩解片及其制备方法,以满足医疗领域中日益增长的需要。 发明内容
本发明在一个方面提供了一种银备叶口腔崩解片制剂, 其中 包含银杏叶提取物以及填充剂、 崩解剂、 矫味剂、 助流剂、 润滑 剂、 嚢材或包衣材料和任选的泡腾剂。
本发明在另一个方面提供了制备 4艮杏叶口腔崩解片的方法。 附图说明
图 1是以芦丁为溶出度评价指标测定实施例 1一 4中的样品的 溶出度示意图。 具体实施方式
在一个实施方案中, 本发明提供了一种银杏叶口腔崩解片, 其中包含下述成分:
1.4艮杏叶提取物 10 ~ 50%, 2.填充剂 10~80%,
3.崩解剂 2~30%, 4.矫味剂 0.5~40%,
5.助流剂 0.01 - 5%, 6.、润滑剂 0.3- 3%,
7.嚢材或包衣材料 0-60%, 8.泡腾剂 0~ 30%。
在本发明中, 用作原料的银杏叶提取物是现有技术中的一种 原料药,在国家药典中将其定义如下: "本品为银杏科植物 Ginkgo bilobaL.的干燥叶经加工制成的提取物" , 含总黄铜醇苷不得少 于 24.0%; 含萜类内酯不得少于 6.0°/。。 可用于本发明的银杏叶 提取物可从众多的生产厂家购得, 或者可通过多种已知的方法制 备, 包括例如有机溶剂提取法, 超临界 C02提取法, 高速逆流色 谱技术提取法, 以及细胞和组织培养合成法等 (华西药学杂志 2002, 17 ( 6 ) : 437 - 439 ) 。 在本发明的银杏叶口腔崩解片中, 4艮杏叶提取物的优选含量为 15 - 40重量%, 更优选为 20 - 35重 量0 /
在本发明中, 填充剂可以是现有技术中已知的任何类型, 包 括但不仅限于甘露醇(粒状或粉状)、 木糖醇、 山梨醇、 麦芽糖、 赤藓醇、微晶纤维素、 PR0S0LV® SMCC、 聚合糖(EMDEX®)、 偶合糖、 葡萄糖、 乳糖、 蔗糖、 糊精和淀粉等。 它们可以单独使用, 也可 以以它们的任何组合应用。 在本发明的 4艮杏叶口腔崩解片中, 填 充剂的含量优选为 20 - 60重量%, 更优选为 35 - 60重量%。
在本发明中, 崩解剂可以是现有技术中已知的任何类型, 包 括例如交联聚乙烯吡咯烷酮(PPVP)、 羧甲基淀粉钠(CMS- Na)、 低 取代羟丙基甲基纤维素(L- HPC)、交联羧甲基纤维素钠(CCNa)等任 意一种或它们的任何组合。 在本发明的银杏叶口腔崩解片中, 崩 解剂的含量优选为 5 - 25 % , 更优选为 10 - 20重量%。
在本发明中, 矫味剂可以是现有技术中已知的任何类型, 包 括但不仅限于甘露醇、 木糖醇、 甜菊甙、 乳糖、 果糖、 蔗糖、 蛋 白糖、 麦芽糖醇、 甘草甜素、 环己氨基磺酸钠、 明胶、 阿司帕坦、 香蕉香精、 菠萝香精、 香兰素、 香橙香精、 桔子香精、 薄荷香精、 人参香精、 草莓香精、 枸橼酸、 杵檬酸等。 它们可单独使用, 也 可以它们的任何组合使用。 在本发明的银杏叶口腔崩解片中, 矫 味剂的含量优选为 0. 5 - 30重量%, 最优选为 0. 5 - 10重量%。
在本发明中, 助流剂可以是现有技术中已知的任何类型, 包 括例如微粉硅胶、 滑石粉、 Cab-0- s i l、 Aros i l、 7j合硅铝酸钠等 或者其任意组合。 在本发明的银杏叶口腔崩解片中, 助流剂的含 量优选为 0. 1-4重量% ,更优选为 0. 5 - 3 % ,作优选为 0, 5 - 2. 0%。
在本发明中, 润滑剂可以是现有技术中已知的任何类型, 包 括例如硬脂酸镁、 十二烷基硫酸镁、 滑石粉等任意一种, 或者它 们的任何组合。 在本发明的银杏叶口腔崩解片中, 润滑剂的含量 优选为 0. 5 - 2. 8重量% , 更优选为 1-2. 5 % 。
在本发明中, 嚢材或包衣材料是任选使用的辅料。 它们可以 是现有技术中已知的任何类型, 包括例如明胶、 阿拉伯胶、 海藻 酸盐、 壳聚糖、 羧甲基纤维素盐、 醋酸纤维素酞酸酯、 乙基纤维 素、 曱基纤维素、 羟丙甲纤维素、 丙烯酸树月旨类(国产丙烯酸树脂 I、 I I、 I I I、 IV, Eudrag i t®系列)、 聚乙烯醇、 聚乙烯吡咯烷酮、 聚乙二醇等任意一种, 或者它们的任何组合。 在本发明的银杏叶 口腔崩解片中, 嚢材或包衣材料的含量优选为 20 - 60重量%, 更 优选为 30 - 60 %, 最优选为 40 - 60 %。
在本发明中, 泡腾剂也是任选使用的辅料, 可以是现有技术 中已知的任何类型, 包括例如柠檬酸或枸橼酸与碳酸氢钠或碳酸 钠的混合物。 在本发明的银杏叶口腔崩解片 中, 泡腾剂的含量优 选为 5 - 25重量%, 更优选为 10 - 20 %。
本发明还涉及所述银杏叶提取物口腔崩解片的制备方法,包括 以下步驟: (1 ) 将矫味剂与银杏叶提取物或经掩味处理后的银 杏叶提取物原料颗粒按量称取, 并混合均匀备用;
( 2 )将填充剂、 崩解剂、 泡腾剂、 助流剂按量称取并混合均 匀,再与经第二步所得之物料混合使均匀,加入润滑剂混匀备用;
( 3 )所得物料经中间体检测, 确定片重后, 送入压片机压片 即得。
在本发明的制备方法中, 对于应用的 L杏叶提取物, 可无需 处理而直接与矫味剂相混合。 或者, 可以在将银杏叶提取物与矫 味剂混合前对其进行下述预处理, 以便对银杏叶提取物较强的苦 味进行预先掩味:
(1)预制微嚢掩味一一取选定的嚢材, 用蒸馏水溶解并稀释 至适当浓度,例如 1 - 10w/v%,优选 2 - 8w/v%, 更优选 3― 5w/v%„ 然后加入助流剂并混合均勾, 再与银杏叶提取物一起采用垂直气 流悬浮后进行空气悬浮法制备微嚢, 所得银杏叶提取物粉末包微 嚢颗粒, 干燥后备用; 或
(2)粉末包衣掩味一一取所选定的包衣材料,用合适的溶剂例 如乙醇、 乙醇水溶液、 丙酮等溶解, 并稀释至适当浓度, 例如 1 - 10w/v%, 优选 2 - 8w/v%, 更优选 3 - 5w/v%, 以备使用。 再取银 杏叶提取物置于沸腾床中使沸腾, 然后喷入上述溶液进行粉末包 衣, 得银杏叶提取物粉末包衣颗粒, 干燥后过筛。 喷射速度可依 所使用的具体设备, 通过常规方法确定。 这些都在本领域普通技 术人员的技术范围之内。
本发明所述及的银杏叶口腔崩解片, 其制备方法为直接压片 法, 具有制备常规片剂的生产厂家均可采用。
本发明的 1杏叶口腔崩解片可用于治疗心脑系统疾病, 例如 冠心病、 心绞痛、 急性脑梗塞, 以及脑动脉硬化或脑循环障碍等。 其给药剂量可以根据下列已知因素而在较宽的范围内变化,诸如: 欲治疗疾病的类型、 疾病的严重程度、 病人的体重、 所选用的给 药途径以及每天的给药次数等。 不过, 最佳量可以由临床医生容 易而常规地确定。有关药物制剂的内容在现有技术中有诸多教导, 参阅例如 "Remington药物科学,, ( 1985 ) 或 Remington:药物科 学与实践, 19版, 1995。
因此, 本发明涉及一种治疗、 緩解或预防个体中心脑系统疾 病, 例如冠心病、 心绞痛、 急性脑梗塞, 以及脑动脉硬化或脑循 环障碍等的方法, 包括对该个体给予有效量的本发明的银杏叶提 取物口腔崩解片制剂。 术语 "个体" 是指可以施用银杏叶提取物 的任何动物, 优选哺乳动物, 尤其是人。 可用本发明方法进行治 疗的具体个体包括人以及非人灵长动物、 绵羊、 马、 牛、 山羊、 猪、 狗、 猫、 兔、 豚鼠、 仓鼠、 沙鼠、 大鼠和 '卜鼠等,
为了更好的说明本发明, 结合直接矫味法、 预制微嚢掩味法 及粉末包衣掩味法分别列举实例如下。 这些实施例只是用于进一 步阐述本发明, 而不以任何方式限制本发明的内容。 实施例
实施例 1 直接矫味法
一. 处方
1.原料——银杏叶提取物(EGb) 40g;
2.泡腾剂一一柠檬酸 18g; 碳酸氢钠 14g;
3.填充剂一一微晶纤维素 20g , 甘露醇 79g ;
4.助流剂——微粉硅胶 4g;
5.崩解剂一一交联聚乙烯吡咯烷酮 16g;
6.矫味剂一一阿司帕坦 8g , 薄荷香精 0. 4g ;
7.润滑剂一一硬脂酸镁 0. 6g;
总重 200g, 共制成 1000片, 银杏叶提取物含量 20%。
二. 制备方法
第一步取银杏叶提取物(Egb)、 阿司帕坦和薄荷香精, 分别过 40目筛, 混合均匀, 得已经矫味的银杏叶提取物原料备用;
第二步取微晶纤维素、 柠檬酸、 碳酸氢钠、 甘露醇、 微粉硅 胶、 交联聚乙烯吡咯烷酮分别过 40目筛, 混合均匀, 再将经矫味 的原料加入并混合均匀, 最后加入硬脂酸镁并';昆合均匀;
第三步中间体含量检测,确定片重后, 送入压片机压片即得。 实施例 2 预制微嚢掩味法
一. 处方 1.原料—— 4艮杏叶提取物 40 g;
2.嚢材一一明胶 15g; 聚乙二醇 8g;
3.填充材料一一甘露醇 111. 3g;
4.崩解剂一一交联羧甲基纤维素钠 20 g;
5.助流剂——微粉硅胶 4. 4g;
6.矫味剂——甜菊甙 4g, 人参香精 0. 4g;
7.润滑剂一一硬脂酸镁 0. 6g;
总重 203. 7g, 共制成 1000片, 银杏叶提取物含量 19. 6%。 二. 制备方法
第一步取明胶、 聚乙二醇用水配成一定浓度的溶液后加入微 粉硅胶混匀作为嚢材备用;
第二步取银杏叶提取物用垂直气流悬浮后进行空气悬浮法制 备微嚢, 所得银杏叶提取物粉末包微嚢颗粒,经过干燥, 过 0. 5腿 筛, 备用;
第三步将甘露醇、 微粉硅胶、 交联羧甲基纤维素钠、 甜菊甙 和人参香精混合均勾, 再和过筛后的微嚢混合使均匀, 加入硬脂 酸镁, 混合使均匀;
第四步中间体含量检测,确定片重后, 送入压片机压片即得。 实施例 3 粉末包衣掩味法
一. 处方
1.原料一一银杏叶提取物 40g;
2.包衣材料——乙基纤维素 12g , Eudrag i t® E100 8g , Eudrag i t® NE30D 3. 3g;
3.填充剂——甘露醇 111. 3g;
4.助流剂——微粉硅胶 4. 4g; 5.崩解剂一一交联聚乙烯吡咯烷酮 16g;
6.矫味剂一一阿司帕坦 4 g , 香橙香精 0. 4g;
7.润滑剂——硬脂酸镁 0. 6 g;
总重 200g, 共制成 1000片, 银杏叶提取物含量 20%。
二. 制备方法
第一步取乙基纤维素、 Eudrag i t® E100和 Eudrag i t® NE30D 用 95%以上的乙醇溶解并稀释至一定浓度备用;
第二步取银杏叶提取物置于沸腾床中沸腾, 按一定速度喷入 上述溶液进行粉末包衣, 制得银杏叶提取物粉末包衣颗粒, 干燥 后过 0. 6mm筛, 备用。
第三步将甘露醇、 微粉硅胶、 交联聚乙烯吡咯烷酮、 阿司帕 坦和香橙香精混合均勾, 再和过筛后的包衣颗粒混勾, 最后加入 硬脂酸镁, 混匀,
第四步中间体含量检测,确定片重后, 送入压片机压片即得。 实施例 4 粉末包衣掩味法
一. 处方
1.原料一一银杏叶提取物 40g;
2.包衣材料——乙基纤维素 10g, Eudrag i t® E100 10g , Eudrag i t® NE30D 1. Og;
3.填充剂一一甘露醇 100g, 微晶纤维素 10 g;
4.助流剂——微粉硅胶 5. 4g;
5.崩解剂一一交联聚乙烯吡咯烷酮 16g; 低取代羟丙基纤维 素 24g
6.矫味剂——阿司帕坦 4 g;
7.润滑剂一一硬脂酸镁 2. 5g; 8.粘合剂一一羧甲基淀粉钠 2. 0 g;
共制成 1000片, 银杏叶提取物含量 17. 8%。
二. 制备方法
第一步 Eudragi t® E100 、 Eudrag i t®NE30D和乙基纤维素溶 解于适量的乙醇充分搅拌使溶解,再加入处方量 0. 2%微粉硅胶后 保持搅拌使微粉硅胶均匀混悬, 作为嚢材备用;
第二步银杏叶提取物与处方量 2%微粉硅胶:混合均匀, 置于流 化床中, 采用空气悬浮法制备 嚢;
第三步将羧甲基淀粉钠用水制成 5%的胶浆作为粘合剂备用; 第四步将对银杏叶提取物、柠檬酸和桔子香精过 60目筛后混 合均匀, 用粘合剂制粒, 过 40目筛, 烘干, 备用;
第五步将甘露醇过 60 目筛后混合均勾, 用粘合剂制粒, 过
40目筛, 烘干, 备用;
第六步将银杏叶提取物颗粒和甘露醇颗粒充分混合均匀, 加 入交联聚乙烯吡咯烷酮、 低取代羟丙基纤维素、 阿司帕坦和微粉 硅胶, 混合均匀, 外加硬脂酸镆, 检测含量, 确定压片片重;
⑤ 压片, 进行铝塑包装。 实施例 5 崩解时限的测定
为评价药品在口腔内的崩解效果, 进行下述实验。
取 50ml 的烧杯 6只, 置 37 °C的水浴中, 各加水 2ml ,放置 10 分钟,使温度平衡,取上述实施例 1中制备的口腔崩解片制剂 各 6片, 每片分别加入一只烧杯中, 计时, 轻轻摇动烧杯, 以能 判断出未崩解的片芯为准, 测定完全崩解的时间,应在 60秒内崩 解。 计算 6个药片的平均崩解时间, 定为崩解时限。 按照相似的 方法, 测定实施例 2 - 4中制备的口腔崩解片的崩解时限, 并列在 下表 1中, 进行比较。
另外,还按照常规方法测定各药片的硬度, 同样列在表 1中。 表 1 实施例 崩解时限 (秒) 片子硬度(牛顿)
1 45秒 18-32
2 33秒 18-30
3 23秒 18-27
4 26秒 18-29 由表 1的结果可看出,按照本发明实施例 1 - 4制备的口腔崩 解片均具有合适的药片硬度以及崩解时限。
实施例 6 溶出度测定方法
为评价药品在体外的溶出效果和在体内的吸收效果, 进行下 述实验, 其中以芦丁为溶出度评价指标测定本品的溶出度。
照溶出度测定法(中国药典 2000年版二部附录 XC第二法), 以盐酸液(将 9ml浓盐酸稀释成 l O OOml制得) 900ml为溶剂, 转 速为每分钟 50转,依法操作, 经 30分钟时, 取溶液 20ml , 滤过, 取滤液调整稀释倍数使吸收度在 0. 3-0. 7 之间, 加溶出介质(将 9ml浓盐酸稀释成 1000ml制得的盐酸液)稀释至刻度, 作为供试 液;另取芦丁对照品(中国药品生物制品检定所)约 16mg ,置 50ml 量瓶, 加乙醇溶液, 稀释至刻度, 精密吸取 2ml 置 25ral量瓶中, 用溶出介质稀释至刻度, 摇勾, 作为对照液, 于 257nm处测定吸 收度, 计算溶出的芦丁的量。
另取本品 10 片精密称定, 研细, 取细粉适量 (约相当于 1 片重量)置 lOOral量瓶中, 加乙醪 50ml , 超声使溶解, 加乙醇溶 液至刻度, 摇匀, 滤过取取续滤液 lml置 10 ml量瓶中加溶出介 质至刻度,于 257 nm处测定吸收皮,计算出平均每片芦丁的含量, 以溶出的芦丁量占每片芦丁舍量的百分比为溶出度, 计算即 得。 限度为 75%, 应符合规定。 图中结果可看出, 各实施例样 品均具有良好的溶出度, 因此可 保证药物在体内具有良好的吸 收和生物利用度。
实施例样品的释放曲线见图 1。 参考文献
1. 唐灵,苏珂.银杏叶提取物的药理及临床应用进展.华夏医 学 2001, 6-14 (3) Ρ. 401-403。
2. 王虎军,李燕红 . 4艮杏叶提取物注射液致血管红肿.药物不 良反应杂志 2003, 1P. 54。
3.苏琴,彭朝津,李平生,楚勤英.银杏叶提取物静滴致过敏性 咳嗽. 药物不良反应杂志 2003, 1P. 54。
4. 张辉, 樊红灿. 口腔崩解片 的研制 . 《海南医学》 2003, 14 (9) Ρ. 88-90。
5.陈冲等.银杏叶提取物的生产工艺条件研究。 《中草药》 1997 , ( 28 ) 7: 402 - 404。

Claims

权 利 要 求
1. 一种银杏叶口腔崩解片,其中包含银杏叶提取物、填充剂、 崩解剂、 矫味剂、 助流剂、 润滑剂等原辅料, 各原辅料之间的配 比如下: 银杏叶提取物 10 ~ 50重量%, 填充剂 10 ~ 80重量%, 崩 解剂 2 - 30重量%, 矫味剂 1 ~ 40重量%, 助流剂 0. 01 ~ 5重量%, 润滑剂 0. 3 ~ 3重量%。
2. 按照权利要求 1的银杏叶口腔崩解片, 其中所述填充剂选 自粒状或粉状甘露醇、 木錄醇、 山梨醇、 麦芽糖、 赤蘚醇、 微晶 纤维素、 PR0S0LV® SMCC:、 聚合糖(EMDEX®)、 偶合糖、 葡萄糖、 乳 糖、 蔗糖、 糊精和淀粉等或者其任意組合。
3. 按照权利要求 1的 4艮杏叶口腔崩解片, 其中所述崩解剂选 自交联聚乙烯吡咯烷酮(PPVP)、 羧甲基淀粉钠(CMS-Na)、 低取代 羟丙基甲基纤维素(L- HPC)、交联羧甲基纤维素钠(CCNa)或者其任 意组合。
4. 按照权利要求 1的银杏叶口腔崩解片, 其中所述矫味剂选 自甘露醇、 木糖醇、 甜菊甙、 乳糖、 果糖、 蔗糖、 蛋白糖、 麦芽 糖醇、 甘草甜素、 环己氨基磺酸钠、 明胶、 阿司帕坦、 香蕉香精、 菠萝香精、 香兰素、 香橙香精、 桔子香精、 薄荷香精、 人参香精、 草莓香精、 枸橼酸、 柠檬酸等, 或者其任意组合。
5. 按照权利要求 1的银杏叶口腔崩解片, 其中所述助流剂选 自微粉硅胶、 滑石粉、 Cab-0- s i l、 Aros i U 7j合硅铝酸钠等或者 其任意组合。
6. 按照权利要求 1的 4艮杏叶口腔崩解片, 其中所述润滑剂选 自硬脂酸镁、 十二烷基硫酸镁、 滑石粉等或者其任意组合。
7. 按照权利要求 1的银杏叶口腔崩解片, 其中所述银杏叶提 取物的含量为 10 - 50重量%。
8. 按照权利要求 1的银杏叶口腔崩解片, 其中所述银杏叶提 取物的含量为 20 - 35重量%。
9. 按照权利要求 1的银杏叶口腔崩解片, 其中所述填充剂的 含量为 20 - 60重量%。
10. 按照权利要求 9 的银杏叶口腔崩解片, 其中所述填充剂 的含量为 35 - 60重量%
11. 按照权利要求 1 的银杏叶口腔崩解片, 其中所述崩解剂 的含量为 5 - 25重量%。
12. 按照权利要求 9 的银杏叶口腔崩解片, 其中所述填充剂 的含量为 10 - 20重量%
13. 按照杈利要求 1 的银杏叶口腔崩解片, 其可用于治疗心 脑系统疾病。
14. 制备权利要求 1 的银杏叶口腔崩解片的方法, 其中包括 以下步骤:
( 1 ) 将矫味剂与银杏叶提取物或经掩味处理后的银杏叶提 取物原料颗粒按量称取, 并混合均匀备用;
( 2 )将填充剂、 崩解剂、 泡腾剂、 助流剂按量称取并混合均 匀, 再与经第 (1 )步所得之物料混合使均匀, 加入润滑剂混匀备 用; 和
( 3 )所得物料经中间体检测, 确定片重后, 送入压片机压片 即得。
15. 按照权利要求 14的方法, 其中任选地, 在将银杏叶提取 物与矫味剂混合前对其进行下述预处理:
(1)预制微嚢掩味一一取选定的嚢材,用蒸馏水溶解并稀释至 适当浓度, 加入助流剂并混合均勾, 再与 4艮杏叶提取物一起采用 垂直气流悬浮后进行空气悬浮法制备微嚢, 所得银杏叶提取物粉 末包微嚢颗粒, 干燥后备用; 或者
(2)粉末包衣掩味一一取所选定的包衣材料,用合适的溶剂溶 解并稀释至适当农度备用, 再取银杏叶提取物置于沸腾床中使沸 腾, 然后喷入上迷溶液进行粉末包衣, 得银杏叶提取物粉末包衣 颗粒, 干燥后过筛备用。
16. 按照权利要求 15所述及的制备方法, 其中用于掩味处理 的嚢材或包衣材料是明胶、 阿拉伯胶、 海藻酸盐、 壳聚糖、 羧甲 基纤维素盐、 醋酸纤维素酞酸酯、 乙基纤维素、 甲基纤维素、 羟 丙甲纤维素、 丙婦酸树脂类(国产丙烯酸树脂 I、 I I、 I I I、 IV, Eudragi t®系列)、 聚乙烯醇、 聚乙烯吡咯烷酮、 聚乙二醇等或者 其任意组合。
17. 按照权利要求 14的方法,其中还任选地加入辅料泡腾剂。
18. 按照权利要求 17的方法, 其中所述辅料是柠檬酸或枸橼 酸与碳酸氢钠或碳酸钠的混合物。
19. 一种治疗、 緩解或预防个体中心脑系统疾病, 例如冠心 病、 心绞痛、 急 4生脑梗塞, 以及脑动脉硬化或脑循环障碍等的方 法, 包括对所述个体给予有效量的权利要求权利要求 1的银杏叶 口腔崩解片。
PCT/CN2004/001580 2003-12-31 2004-12-30 Comprime oral desintegrable de feuilles de ginkgo WO2005063267A1 (fr)

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EP4248955A3 (de) * 2019-01-15 2023-11-22 Dr. Willmar Schwabe GmbH & Co. KG Verfahren zur herstellung von leicht einzunehmenden tabletten mit trockenextrakt aus ginkgo biloba blättern
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