Crestor
"After a few years of taking Crestor (which worked fine for its intended purpose), I suddenly developed a severe case of Sciatica. I couldn't stand, sit, walk, lie down, or any other activity without terrible pain up and down the back of my left leg. I was tested for everything including MRI and using novocaine and other pain killers. Nothing helped. After 5 months of constant pain, my doctor suggested discontinuing Crestor. The pain was completely gone within a week. Come to find out, my Sciatic nerve passed through my Piriformis muscle instead of around it like in most people. The Crestor had caused toxicity in the Piriformis muscle  which caused it to squeeze the Sciatic nerve continuously, causing continuous pain."