Lipitor (aka Atorvastatin) is prescribed for patients with high cholesterol. It functions to lower the levels of overall cholesterol, LDL, triglycerides and to increase levels of HDL. It is part of a group of drugs called statins. Side effects: The use of this drug has been reported to cause myopathy - resulting in weakness. Liver function labs (AST and ALT) should be monitored regularly because the drug cannot be processed by an unhealthy liver. Avoid Grapefruit juice ~ cause toxicity.