I am just out of hospital after 7 days from Rhabdomyolysis brought on by dehydration after playing tennis on a very hot day. There was the possibilty that my heart and kidneys suffered damage. When i think back I was waking up in the morning with lower back pain but I attributed that to being a weekend athlete that had really stepped up my activity. My wife also swears that my memory is terrible and when i stop to think about it (what was I thinking about again????) she is right. The hospital doctor took me off simvastatin and the pain while in the hospital and my first night home was gone. I was being treated as a diabetic but once in the hospital my blood sugars were all normal and my metformin was stopped. I was told that what happened could have killed me not to mention heart and liver damage. Watch that muscle pain carefully!!