About mentholterpenes and terpenoid, antipruritic, decongestant, topical analgesic.mechanism of action of mentholmenthol acts as a local anesthetic on the respiratory passageways and causing cough suppression. when menthol is rubbed on the skin, it acts as a rubefacient and causes localized vasodilatation- which gives feelings of comfort and warmth. when applied gently on the skin, it acts as an anti-pruritic agent and creates a feeling of coolness, and mild local anaesthetic effect relieves itching. it has good soothing effect and acts as a demulcent. it also acts as a carminative.