I may have some symptoms of parkinson disease; is it possible that some medication cause symptoms like these?

Possibly: There are a number of medications with side-effects that mimc parkinson disease. Reglan and Compazine are very common examples. Similarly, a number of anti-psychotic and mood stabilizing medications can do so, as well...E.G. Haldol, risperdal, abilify (aripiprazole)...There are very many...Even Depakote can, through a different mechanism...And, less commonly, ssri's, such a Paxil and Prozac (and others)...