Not even sure how I ended up at PubMed Simvastatin page -http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0000911/ - but this drew my attention.. I think from now on this will be my test for any doctor (please note I do not take this drug :) )

“Tell your doctor if you are taking antifungal medications such as itraconazole (Sporanox) and ketoconazole (Nizoral); clarithromycin (Biaxin); erythromycin (E.E.S., E-Mycin, Erythrocin); HIV protease inhibitors such as indinavir (Crixivan), ritonavir (Norvir) and saquinavir (Invirase, Fortovase); nefazodone (Serzone); and telithromycin (Ketek). Your doctor will probably tell you not to take simvastatin if you are taking these medications.”