Levitra (vardenafil) is most often prescribed for men suffering from erectile dysfunction, but your health care provider may recommend taking this medicine for a number of other conditions. Levitra comes as a tablet intended for oral administration. You are supposed to take it about an hour before you are planning to have sex. Try not to drink alcohol while you are using this medicine as it may cause some unpleasant side effects related to the vessel-dilating properties, or intensify the side effects you already had. Your doctor needs to know about any vitamins or supplements you are currently taking. Tell your doctor if you are taking alpha blockers, antifungals, HIV protease inhibitors, drugs for the treatment of erectile dysfunction, high blood pressure or irregular heartbeat medications, as well as dexamethasone, sertraline, cyclosporine, rifampin, phenytoin, diltiazem, isoniazid, fluoxetine, verapamil, nevirapine, sotalol, paroxetine, zafirlukast, lovastatin, erythromycin, phenobarbital, clarithromycin, delavirdine, rifabutin, nefazodone, metronidazole, efavirenz, disopyramide, fluvoxamine, quinidine, danazol, cimetidine, troleandomycin, procainamide, carbamazepine. If you are using any medicines not mentioned in this list also report them to your health care provider, as this is not the complete list of drugs that have been reported to interact with Levitra. If you develop any side effects that are too bothersome or that you did not know about, report them to your doctor as soon as possible.