Hi, Eugene - welcome to neurotalk! Typing is difficult since I have severe tremors in both hands. However, it is essential tremor and not PD. I take Requip [not XL] for restless legs. I find it has no side effects, and since the condition for which I take it has improved, I take it only as needed, with no effects of withdrawal whatsoever. I cannot answer your question as relates to taking Requip for PD, but wanted you to know that I perceive no side effects from it at all and that it is very effective for restless leg syndrome. Bless you in your journey to discover more about your illness and treatment. billie