Simvastatin is the drug my doctor took me off of yesterday, because it was causing me horrible muscle and joint pain. I took it for years, and had awful pain all those years, but never connected it to the dratted drug! I thought it was because I needed a new mattress (which I did.) The only reason I figured out it was the drug was because I stopped taking it without her permission. I told her I would start it again if my cholesterol went up. I felt really great while off the drug, (new bed, you see), but within 5 days of starting back on the garbage, the horrid pain came back.