I have been on Zocor for one month and have noticed vague muscle soreness, almost like the flu, I ache when I try to sleep. Supposedly Zocor has no side affects, but after reading I am not taking any chances. I went on because of high c-reactive protein and slightly high cholesterol. I've decided to watch my diet closely instead. Thanks for everyone's input, I now see the light and can maybe avoid additional pain!