Perform liver function tests before starting, 12 weeks after, during dose evaluation, and regularly thereafter. Patients with diffuse myalgia, muscle pain or weakness, and/or significant increases in CPK are advised to promptly report muscle pain, tenderness, or weakness, especially if accompanied by malaise or fever. Atorvastatin therapy should be discontinued if there is a significant increase in CPK levels or if myopathy is suspected or diagnosed, or in the presence of risk factors for developing secondary renal failure due to rhabdomyolysis.