外がい用よう薬やくがいようやくMeanings1nounmedicine for external use; topical medicineRefers to medications applied to the skin or mucous membranes, such as ointments, creams, and patches, as opposed to internal medicines.この外がい用よう薬やくは1日にち2回かい患かん部ぶに塗ぬってください。