A preparation intended for application to the skin, such as ointments, creams, or lotions; a topical agent.
この塗布剤はかゆみを抑えるために皮膚に直接塗ってください。
Apply this topical agent directly to the skin to relieve itching.
薬局で乾燥肌用の塗布剤を買った。
I bought a topical preparation for dry skin at the pharmacy.
説明書に従って、患部に薄く塗布剤を塗ること。
Follow the instructions and apply a thin layer of the topical agent to the affected area.