I'm so glad I found this site! I took ZOCOR for 2 weeks. In that time I experienced severe muscle fatigue in my arms, back, and neck. My jaws even hurt while chewing food. I also experienced blurred vision, tingling feet & hands. I have been off the ZOCOR for 1 week, but honestly the symptoms have not really gotten better. In fact, I would almost say they have gotten worse. I was put on a ZOCOR due to a slightly elevated cholesterol level, & family history of cholesterol/heart problems. However, I would much rather have the elevated level than these unbearable symptoms. I am 37 years old and felt fine before the medication, but now feel like a 60 year old. I am exhausted ALL the time, and simple tasks tire me out.