Lipitor (atorvastatin) is a statin used for the treatment of elevated total cholesterol, LDL, triglycerides, and to elevate HDL cholesterol.
Commonly reported side effects of atorvastatin include arthralgia, nasopharyngitis, and diarrhea. Other side effects include urinary tract infection, myalgia, musculoskeletal pain, nausea, muscle spasm, limb pain, and insomnia.