Amantadine for antipsychotic-induced parkinsonism

Question from a Member: I have a patient who has EPS and isn’t tolerating trihexyphenidyl well (says he’s foggy-headed, constipated, and has a dry mouth). He also has had problems with benztropine. I was thinking of trying amantadine but have never used it for EPS. Is this a medication you’ve found effective? If so, how…