benztropine

noun

benz·​tro·​pine benz-ˈtrō-ˌpēn, -pən 

: an anticholinergic drug administered in the form of its mesylate C₂₁H₂₅NO·CH₄O₃S especially to treat the symptoms of Parkinson's disease (as tremors, spasms, or muscle weakness) or similar symptoms caused as side effects of other drugs (as phenothiazine derivatives)

… an anticholinergic agent, such as benztropine, that restores the balance between dopamine and acetylcholine and reestablishes the normal inhibitory outflow from the basal ganglia.

—Raphael J. Leo and Simrita Singh