Hi Samantha, It is late in my day, well almost morning really, over here in the UK, so haven't read your other posts, only looked at the headers. I do not know about the medication you are asking about, but wonder whether your neurologist is a movement disorder specialist, if not I would suggest finding one if your current neurologist is veering towards a PD diagnosis. You are very young and I guess that few doctors would want to give you a quick diagnosis, but will rather watch your progress on medication and see how you do. This can be frustrating. There is a type of scan called a PET scan which can confirm PD, it is reputed to have a 94% success rate. You already seem to be on quite a mix of medication......Have replied really to keep your post at the top of the heap, and to show a little solidarity! Wish I could say more, perhaps you could tell us a little bit more about how you arrived at this point, and your response to l-dopa.

Someone a bit more knowledgeable will come along and post about trihexiphenidyl i should think.

Stick with finding out more about things, whatever it is you have the way forward is to be well informed.

Lindy