IMODIUM® (loperamide hydrochloride), 4-(p-chlorophenyl)-4-hydroxy-N, N-dimethyl- a, a-diphenyl-1-piperidinebutyramide monohydrochloride, is a synthetic antidiarrheal for oral use. IMODIUM® (loperamide hcl) is available in 2mg capsules. The inactive ingredients are: Lactose, cornstarch, talc, and magnesium stearate.