薬やく用よう石せっ鹸けん

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Meanings

1

noun

medicated soap

Soap containing active ingredients for skin conditions like acne or eczema; often labeled 医薬部外品.

medicine, chemical, enamel

用utilize, business, service

石stone

鹸saltiness

石せっ鹸けん
General soap; 薬用石鹸 is a specific type with medicinal properties.
医い薬やく部ぶ外がい品ひん
Quasi-drug category under which many medicated soaps are regulated in Japan.

Compound of 薬用 (medicinal use) + 石鹸 (soap).