Hi! When I use to take melatonin for sleeping, I use to have vivid dreams often accompanied with sexual arousal (testosterone production?!?). Besides, some research on melatonin suggests that this might even help PD symptoms and also inhibit growth of prostate cancer cells. However, I stopped taking melatonin recently for fear of it causing sleep apnea. But, still I do not know what caused sleep apnea. It could be because I used three or four pillows when I slept, since it felt comfortabe for my shoulder pain, which could have caused blocking of air passage thus causing sleep apnea symptoms. Now a days, I have stopped melatonin and got used to only two rather flat pilllows to sleep on. I do not have any problem with sleep apnea. Since, I do not have an sleeping problem now a days, I am not inclined to find out the real cause of my sleep apnea. Even a mild form of exercise helps me sleep well now a days. I would not mind hearing your experience with melatonin. Raj [log in to unmask] ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn