Patients taking the following preparations will not be allowed to participate in the study unless they agree to discontinue usage at least two weeks prior to randomization and for the duration of the study period: grapefruit juice and herbal remedies that may lead to severe liver injury and/or muscle injury if taken with atorvastatin, including: Skullcap, chaparral, Germander, Jin Bu Huan, Valerian, Comfrey, and Eucalyptus. Since other products such as St. John s Wort, oat bran, and pectin can reduce the effectiveness of atorvastatin, they and similar agents, should also be discontinued at least two weeks before randomization and for the duration of the study period.