Last night the strange muscle/joint pain returned. It woke me up at 1:30AM. The pain got bad enough I woke my granddaughter with my moaning. I took 2 pain pills and put heat on it and finally got it calmed down. No SOB or cardio symtoms of any kind. Today I recalled reading the side effects of satins and looked up simvastin. Yes one of the side effects is muscle or joint pain another is gas which I have had plenty of. I am not going to take the simvastin for a couple of days and see if the pain goes away. This did not start until nearly a month after the surgery so it is the only thing that makes sense to me. Has anyone else experienced side effects of satins.