My side effects are the same as Guest #26472. The pain is so bad in my legs and ankle musles sometimes I can hardly get up from a chair or walk across a room, I find myself walking bent over to relieve the pain I have in my shoulder and upper arm musles, my hands feel like pins and needles and my ankles and lower legs swell. In January I had a triple bypass and have been taking 80mg Zocor ever since. I have talked with my Dr. about this and he has never said to stop taking Zocor or recommended any other medication, he has only adjusted other medications I am on.