Simvastatin and tiredness

Iv been on 40mg for a year now i could be feeling perfectly fine then suddenly an intense tiredness comes over me and i feel very sick and start heaving quite violently and desperately need to lie down until it passes, sometimes i fall asleep and sometimes not. This is a day occurrence, sometimes even 2 to 3 times a day. This only started when i started taking these tablets. The doctor says is not anything to do with the medication but im convinced it is. Has anyone else got these side effects?

been on simvastatin for 4 years with no problems then got pills from a different chemist same 40mg but a different maker immediate symptoms were chronic diarrhea, loss of appetite, tiredness, kept taking after all no side effects with previous maker.thought i had a serious stomach disorder.stopped taking when i realized that was the only constant that had changed,immediate results took none for 3 weeks went back to gp he put me back on my original pills,after taking one,thought that the end was nigh ,diarrhea,sweating general feeling of weakness never again they are binned.

aching elbows and knees within one week of starting simvastatin 40mg . Told by GP to stick with it . Now have severe muscle pain in arms . Wake up at night with severe pins and needles in hands and feet , which takes hours to pass . Muscle deterioration in upper arms . Overall tiredness . Doctor knows best.......I don't think so........stopped today , wish I'd never taken them .

I started on it in June 2007, by December, I had gained 20 lbs, was out of breath most days and was weak all over. Had general sore muscles and felt out of strength. Been off now 5 days, strength is returning and am feeling much better. No weight loss yet but at least I feel much better. Sleeping was not affected one way or the other.