I have many of the symptoms stated by readers. It started with general fatigue and muscle stiffness. I told the doctor that I have never felt this old before ( I am in my mid forties). I have gone from being healthy and fit to feeling old and fatigued. I have stopped Zocor after almost a year. I now have numbness and tingling in my right arm, legs ( including toes). My Doctor is trying hard to convince me that it could be because of diabetes when I have not been diagnosed as having diabetes? I am sure Zocor is the cause and the FDA needs to investigate. I do hope there are no long term repercussions!