<prompt> Akathesia is treated by all except -TrihexyphenidylDiazepamHaloperidolPromethazine  <response>: Drugs used in Akathesia β -blockers propranolol, metoprolol Antihistaminic Diphenhydramine, PromethazineVitamin B6Central anticholinergics e.g. TrihexyphenidylDiazepamAmantadine 