Drug Interactions

Simvastatin (Zocor) and Impotence
Five men with coronary artery disease developed impotence within one week of starting treatment with simvastatin 10 mg or having the dose increased to 20 mg (three men); they also had profound lethargy and inertia. Drug treatment for heart disease (aspirin alone in two patients) was not changed. Within one week of stopping simvastatin sexual function was restored.
http://www.bmj.com/cgi/content/full/315/7099/31/a