I've been taking the Artane for years myself I was first given this in 1989 ad I've been taking it every since both here in Alabama and also in Oklahoma where they first started it and it also gave me short term memory loss and hallucinations too both visual and auditory too but they informed me way back in 1989 that it might cause me side effects but that if I wouldn't sign the form that I couldn't be treated either so I was stuck between a rock and a hard spot I either signed or continue to suffer the effects of mental illness unabated so I now suffer from shaking uncontrollable or suffer night-terrors caused by mental illness and PTSD either way I'm stuck now

Artane gave my husband hallucinations

I'am taking Artane works to control shaking of my hands one of the best medicine I take I don't think I have any side effects

http://www.drugs.com/mtm/artane.html
What is Artane (trihexyphenidyl)?
Trihexyphenidyl alters unusual nerve impulses and relaxes stiff muscles.

Trihexyphenidyl is used to treat the stiffness, tremors, spasms, and poor muscle control of Parkinson's disease. It is also used to treat and prevent the same muscular conditions when they are caused by drugs such as chlorpromazine (Thorazine), fluphenazine (Prolixin), perphenazine (Trilafon), haloperidol (Haldol), thiothixene (Navane), and others.