Oxybutynin Hydrochloride belongs to group of drugs ... drugs used in the treatment of depression like amitriptyline due to the additional anticholinergic effect of the drugs.

Food and Drug Administration. FDA-Approved Drugs. Federal Register. The Daily Journal of the United States Government. Determination that ELAVIL (amitriptyline hydrochloride) oral tablets, 10, 25, 50, ...