What is trihexphenidyl HCl tablets used for?

For Parkinson's. This is an antiparkinsonian agent it is used for the symptomatic treatment of parkinson's disease alone or with levodopa. It is also commonly used to treat extrapyramidal side effects occurring during antipsychotic treatment, along with the frequency and duration of oculogyric crises as well as of dyskinetic movements and spastic contractions. It cannot cure parkinson's, but helps symptoms.