I cannot believe I am reading all of this. Almost every sympton I have had. I am only 50 (Ha!) but had a heart-by-pass 5 years ago. I was put on 20 mg of Zocor since. In the last year I have had dizziness, memory loss and of course the muscle aches I have had since taking the Zocor five years ago. I could put up with the muscle aches as I thought "well the Zocor is saving me in other areas". Not anymmore- I can't take the dizzines, lapse of memory and fatigue all day long- I have been to several Neurologists, Blood Samples, Brain MRI's etc-etc- all with the same results- "there is nothing wrong with you"! Well there is- and I believe it is the Zocor- no, I'm convinced. This is my first day off the Zocor- I'm staying off it- hope I get better.