Grapefruit juice may decrease the ability of the liver to metabolize some statins (for example, atorvastatin [Lipitor], simvastatin [Zocor], and lovastatin [Mevacor, Altocor]) and should not be consumed at the same time as the statin medication is taken; some doctors recommend avoiding any grapefruit juice. Also, and possibly more importantly, tell your doctor about any prescription and nonprescription medications you are taking