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Inform your medical professional if you are using barbiturates, rifabutin, rifampin, anticoagulants, amlodipine, medications for hypertension, alpha blockers, erythromycin, bosentan, cimetidine, HIV protease inhibitors, seizure medications, various other impotence meds, different antifungals, nevirapine, 'beta' blockers, or efavirenz, as you may really need a dosage change to make certain there are no interactions possible that could have an effect on the success of either of your therapies.
Nitroglycerin, isosorbide dinitrate and isosorbide mononitrate are the most frequently utilized medicines of this kind, although nitrates can be likewise discovered in particular leisure medicines (poppers).