Abstract: Provided is a transdermal delivery system (for example, in the form of a patch) having a double-layer structure including a drug-containing matrix layer and an adhesive layer, wherein the drug-containing matrix layer is obtained by completely dissolving donepezil using a certain polymer and then formulating along with an adhesive; and a process for preparing the same. The transdermal delivery system according to the present invention does not show any crystallization of donepezil in the formulation, can release donepezil at a uniform rate for a long time, and can inhibit the release dumping phenomenon that occurs in a transdermal delivery system having a single-layer structure.

Abstract: Exemplary embodiments of the present invention relate to a method for preparing a preparation for percutaneous absorption, which includes rotigotine as an active ingredient, and more specifically, to a method for preparing a preparation for percutaneous absorption including mixing rotigotine and an ethylene-vinyl acetate adhesive so as to have a weight ratio of 1:(0.1 to 20), a preparation for percutaneous absorption manufactured by the method, and a percutaneous treatment system. The preparation and the system may prevent separation of the rotigotine, thereby increasing long-term storage stability, and effectively release the rotigotine, and thus can be effectively applied to preparing patch medication containing the rotigotine.

Abstract: A method for preventing the precipitation of rotigotine crystals, including a step of mixing rotigotine and one or more crystallization prevention agents selected from the group consisting of fatty alcohols, fatty acids, fatty acid esters, fatty acid amides, and the derivatives thereof, and to a transdermally absorbable preparation that includes rotigotine and crystallization prevention agents.

Abstract: Provided is a transdermal delivery system (for example, in the form of a patch) having a double-layer structure including a drug-containing matrix layer and an adhesive layer, wherein the drug-containing matrix layer is obtained by completely dissolving donepezil using a certain polymer and then formulating along with an adhesive; and a process for preparing the same. The transdermal delivery system according to the present invention does not show any crystallization of donepezil in the formulation, can release donepezil at a uniform rate for a long time, and can inhibit the release dumping phenomenon that occurs in a transdermal delivery system having a single-layer structure.

Abstract: Disclosed is a composition for transdermal administration containing tolterodine. The composition comprises lidocaine or a pharmaceutically acceptable salt thereof to achieve enhanced skin penetration. The composition enhances the skin penetration of tolterodine. Therefore, a successful commercial application of a tolterodine-containing transdermal preparation based on the composition can be expected.

Abstract: Disclosed is a composition for transdermal administration containing tolterodine. The composition comprises lidocaine or a pharmaceutically acceptable salt thereof to achieve enhanced skin penetration. The composition enhances the skin penetration of tolterodine. Therefore, a successful commercial application of a tolterodine-containing transdermal preparation based on the composition can be expected.

Abstract: Disclosed is a composition for transdermal administration containing tolterodine. The composition comprises at least one essential oil as an abirritant to minimize skin irritation caused by tolterodine. The composition relieves skin irritation caused by tolterodine. Therefore, a successful commercial application of a tolterodine-containing transdermal preparation based on the composition can be expected.