Have been taking 10 mg Lipitor for 2 years. Levels of cholestrrol have dropped to normal range, but i began experiencing muscle weakness and fatigue 6 months ago. I had a fall so thought my symptons were due to injury. I can't ride my horse or walk my dog, which is very frustrating. I saw my doctor last week, he took me off Lipitor and ordered blood tests so I'm waiting to find out if Lipitor is the cause of my problems.