Benztropine (Cogentin) is an anticholinergic drug used to treat muscle-rigidity, restlessness, and stiffness. It is sometimes used, along with antipsychotics, in treating schizophrenia. It is believed that the risk of tardive dyskinesia, which exists as a side-effect of various antipsychotics, can be reduced with the use of benztropine. It is also used to treat Parkinson's disease.