摘要：

To provide a method of preventing degeneration of ropinirole ropinirole containing transdermal dosage formulation. The present invention includes a support, a percutaneous preparation comprising an adhesive layer, a positioned on the support, wherein the adhesive layer is ropinirole or a pharmaceutically acceptable salt thereof, and mercaptobenzimidazole providing percutaneous preparation containing imidazole. The amount of the mercaptobenzimidazole may be from 0.10 to 5.00 wt% with respect to the pressure-sensitive adhesive layer.

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