Is benztropine a narcotic medicine? kgb answers » Health & Body » Health & Fitness » Is benztropine a narcotic medicine? Not Medical Advice: No, Benztropine is not a narcotic medicine. It is used to treat the symptoms of Parkinson's disease, such as muscle spasms & stiffness. Tags: benzatropine, stiffness, parkinson, spasm, disease. Monday, February 06 2012.