I have had a nervous twitch since around 5th grade from a dopamine issue. It is kind of like a very mild Tourette's syndrome and can be acompanied by vocal tics as well. It is no where near as bad as Parkinson's but is similar in nature. I have it mostly under control with no medication now, but it used to be a lot worse in my adolescent years, and I can tell you from a mental perspective it was very stressful and depressing as a teen while I was learning to deal with it and the comments from everyone at school. For my condition, as a child/teen, I would go see the doctor every few months, mostly for a checkup, and they occasionally put me on medication but it made me fall asleep in class, so I had them take me back off of it, learning to live with the condition. It got a lot better in my mid to late 20's. As far as medicine prescribed and doctor's visits, others here may have info or you can probably find it with search engine research. They put me on Clonidine(sp?) for a bit if I remember correctly, which I believe is also a blood pressure medicine.
Oh, one other thing. I don't know if there is a single test for Parkinson's, but for my condition, it was never fully diagnosed even after probably three dozen doctors visits with lots of testing. I'm not sure how easy it would be to diagnose that it was Parkinson's or some other nervousness issue just from hand tremors, so that may be something to research also.