Hello everyone, my neurologist wants me to start the medication Trihexyphenidyl 2mg three times a day. Before I can start taking it I have to see the ophthalmologist. I am just curious if weird side effects are common with this medication and how bad these side effects are. Has anyone had any really good results from being on this medication? As of now I am also on l-dopamine, Celebrex, midodrine, and Bentyl. I feel like my neurologist is leaning towards a diagnosis of PD but does not have enough definitive proof yet. The l-dopa helped a bit and I'm hoping this one does too but I just want some info in it. Any comments would be greatly appreciated.