National Science Council

Other

Department of Health the Executive Yuan, Republic of China

Oliver Yoa-Pu Hu

Hui-po Wang

Ming-Cheng Tsai

Hsiao-Hwa Lu

Jia-Shuai Lee

Wen-Lin Luo

A transdermal formulation for providing antiviral effect in dermis or epidermis, wherein comprising (a) 0.01 to 30 weight percent of antiviral drug; (b) 0.05 to 20 weight percent of a Chinese medicine enhancer; and (c) a pharmaceutical acceptable vehicles. The antiviral drug is selected from the group consisting of ACV(Acyclovir), Carbovir, DDA(2',3'-Dideoxyadnosine), HPMPA(1-(3-Hydroxy-2-phosphonylmethoxylpropyl)-adenosine), DHPG(Ganciclovir), Desciclovir, IDC (5-Iodo-2'-deoxy-cytidine), Vidarabine(Ara-A), DDI(2',3'-Dideoxyinosine), Cordycepin, Cytarabine, Deoxyguanosine, d4T(2',3'-Didehydro-3'-deoxythymidine), FIAC(2'-Fluoro-5-iodoaracytosine), AZT(ZDV, Zidovudine), Ara-T(1-.beta.-D-Ara-binofuranosylthymine), Deoxythymidine, Ribavirin, EDU(5-Ethyl-2'-deoxy-uridine), Enviroxime, Amantadine, Arildone, HPMPC(9-(3-Hydroxy-2-phosphonyl-methoxyl-propyl)cytidine), Riboxamide, Rimantidine, Tromantadine, Foscamet sodium, Moroxydine, F3T(5-Trifluoro-methyl-2'-deoxy-uridine), BVDU (Bromovinyldeoxyuridine). Preferably, the Chinese medicine enhancer is oleanolic acid, and the pharmaceutical acceptable vehicles is polyethylene glycols.

Acyclovir transdermal delivery system

Buprenorphine is a potent analgesic agent, it has been shown to be as effective as morphine. The main clinical application of buprenorphine is to relief postoperative pains or for patients in the terminal phase of cancer. The chance of becoming addiction and abuse is low, therefore it is pretty safe for clinical use. The half life of buprenorphine is short, since its hepatic extraction (extraction ratio is 0.7 to 0.9) and metabolism are high. For these reasons, oral administration of buprenorphine becomes impractical due to the need of giving drug frequiently. The present invention is related to enhancers used in transdermal preparations of narcotic analgesic agents. This invention employs pure components of Chinese herbs in a fixed ratio as transdermal penetration enhancers. Compositions of these transdermal preparations usually include 0.1 to 50% of narcotic analgesic agent, 0.1 to 70% of pure components from Chinese herb as transdermal penetration enhancers, and other necessary excipients for transdermal delivery. Studies for the present invention in nude mice revealed that a transdermal preparation containing 10% of terpineol can delivery 15 mg of buprenorphine through 10 cm.sup.2 skin area in 48 hours, which satisfied the need of practical use.

Transdermal delivery of buprenorphine preparations

An automated dissolution apparatus and method that simulates the physiological condition of gastrointestinal tract has been developed. The invention is capable of continuously adjusting the pH and enzyme content of dissolution medium with consideration of the transit time of a pharmaceutical dosage form. The apparatus includes a pH meter with recorder, a dissolution tester, a UV spectrophotometer, a dissolution data recorder with processor, a personal computer and a printer. The present invention can adjust the pH and enzyme content of a dissolution medium based on the literature information of human gastrointestinal conditions and transit times of various pharmaceutical dosage forms. Use of the present invention not only can change the pH and enzyme content of dissolution medium continueously, but also can differentiate the change of drug release and effects of pH and enzyme content on the drug release rate of pharmaceutical formulations.

Dissolution apparatus simulating physiological gastrointestinal

A series of di- and tri-peptide mimetic dopamine prodrugs are synthesized in which D-phenylglycine or D-p-hydroxyphenylglycine is attached as tools for delivery of L-dopa through the intestine via the intestinal dipeptide-mediated carrier transport system. These compounds are found useful as an active ingredient for the treatment of Parkinson's disease.

Growing community of inventors

Taipei, Taiwan

Oliver Yoa-Pu Hu