I was on the second lowest dosage of lipitor for two weeks and experienced severe muscle weakness and aching in the upper right part of my body. After stopping the statins the side effects lasted for about six to eight months. My strength came back and the aches went away. Every once in a while I get pain in that specific part of my body that lasts for a week to two weeks. The doctors say it's not because of the lipitor but I'm not sure they're right. Ive been on repatha for about six months with no noticable side effects. Repatha took my LDL from about 190 to 50 so that's good anyway.