Liniment is a viscous, medicated topical preparation for application to the skin. It is always applied with friction on unbroken skin. A liniment is an external tincture and is to be rubbed onto sore muscles and sprains. It is usually prepared with isopropyl alcohol or ethyl alcohol. It is a solution or mixture of various substances in oil, alcoholic solution of soap, or emulsions or occasionally semisolid preparations intended for external application and should be labeled accordingly. They may contain the following substances: (a) analgesic, (b) antimicrobial, (c) rubefacient, (d) counterirritant, (e) stimulants, and (f) soothing agents.