Nitto Electric Industrial Co., Ltd.

Nitto-denko Corporation

Toa Eiyo Litd.

Yuusuke Ito

Saburo Otsuka

Shoichi Tokuda

Takashi Kinoshita

Toshiyuki Yoshikawa

Keisuke Shibata

An adhesive tape preparation of clonidine is disclosed, comprising a polytetrafluoroethylene porous sheet having an air permeability of from 10 to 500 seconds having thereon an active ingredient-containing layer comprising a pressure-sensitive adhesive obtained by copolymerizing a monomer mixture comprising from 40 to 80% by weight of 2-ethylhexyl acrylate, from 20 to 60% by weight of 2-methoxyethyl acrylate, and 0 to 40% by weight of vinyl acetate, the pressure-sensitive adhesive containing clonidine as an active ingredient. The preparation achieves sustained release of clonidine and exhibits long-term preservability while minimizing skin irritation and maintaining sufficient adhesion to the skin.

Adhesive tape preparation of clonidine

A percutaneous absorption type preparation and a process for preparing the same are disclosed. The preparation comprises a substantially drug-impermeable backing having provided thereon an adhesive layer comprising a pressure-sensitive adhesive containing therein a percutaneous absorption type drug (solid at room temperature) in an amount greater than the saturated solubility in the adhesive, wherein the excess amount of the drug greater than the saturated solubility is present in the adhesive in a continuous recrystallized state and a substantially network state.

Percutaneous absorption type preparation and process for preparing the

A pressure-sensitively adhering multilayer medicinal preparation comprises a pressure-sensitively adhering macromolecular substance layer and a polymer layer adjacent thereto and the drug and adjuvant incorporated in said preparation each can migrate from the layer of its original incorporation into the other, said adjuvant being capable of increasing absorption of the drug. In such preparation, the drug amount per unit volume can be increased.

Pressure-sensitively adhering composite medicinal preparation

A clonidine preparation for percutaneous administration comprising a support having provided thereon an active ingredient-containing layer is disclosed. The active ingredient-containing layer contains an acrylic polymer having a glass transition temperature of from -70.degree. C. to -10.degree. C. and pressure-sensitive adhesion at room temperature as a base, at least one of clonidine and clonidine hydrochloride as an active ingredient, and a decomposition inhibitor. The active ingredient can be stably maintained within the preparation without being decomposed, and, therefore, can be effectively released over a prolonged period of time.

Preparation for percutaneous administration

A percutaneous absorption type preparation and a process for preparing the same, where the preparation comprises a backing readily conformable to the skin or mucosa and substantially impermeable to a drug absorbed through the skin or mucosa, and an adhesive layer provided on a backing, where the adhesive layer comprises a polymer which is pressure-adhesive at room temperature and the drug present in the polymer, wherein the amount of the drug present in the adhesive layer is greater than its saturated solubility in the polymer is dispersed in the polymer in the form of recrystallized fine particles. The excess portion is again dissolved in the polymer when the drug is consumed as the result of absorption through the skin or mucosa. The drug is released continuously over a long period of time.

A hydrophilic therapeutic material comprising a carrier and a drug-containing patching layer formed thereon directly or indirectly, wherein said patching layer comprises a copolymer of 5 to 75% by weight of an acrylic or methacrylic ester having an ether group in the molecule, 85 to 15% by weight of an alkyl acrylate or alkyl methacrylate and 10 to 50% by weight of a polar monomer copolymerizable therewith.

Hydrophilic therapeutic material

A process for obtaining a composite pharmaceutical preparation which comprises coating or laminating a composition comprising

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Osaka, Japan

Yuusuke Ito