Avoid combining the medication with similar drugs such as Stendra, Cialis or Levitra. Inform your doctor if you are taking any other medications, especially: bosentan (Tracleer), imatinib (Gleevec) cimetidine (Tagamet, Tagamet HB), conivaptan (Vaprisol), isoniazid (for treating tuberculosis), antidepressants e.g. nefazodone, antibiotics e.g. clarithromycin (Biaxin), telithromycin (Ketek), rifampin (Rifater, Rifadin, Rifamate) or erythromycin (E.E.S., Pediazole, EryPed, Erythrocin, Ery-Tab), drugs for high pressure or a prostate disorder such as alfuzosin (Uroxatral), prazosin (Minipress), doxazosin (Cardura), silodosin (Rapaflo), terazosin (Hytrin) or tamsulosin (Flomax, Jalyn), hepatitis C medications boceprevir (Victrelis) or telaprevir (Incivek), heart or blood pressure drugs such as amlodipine (Tekamlo, Tribenzor, Twynsta, Amturnide, Norvasc, Caduet, Exforge, Lotrel), diltiazem (Diltzac, Taztia, Tiazac Cardizem, Cartia, Dilacor, Diltia), quinidine, nicardipine (Cardene), (Quin-G) or verapamil (Calan, Covera, Isoptin, Verelan), antifungal drugs such as ketoconazole (Nizoral), itraconazole (Sporanox) or voriconazole (Vfend), HIV/AIDS medications such as atazanavir (Reyataz), fosamprenavir (Lexiva), indinavir (Crixivan), darunavir (Prezista), nelfinavir (Viracept), saquinavir (Fortovase), ritonavir (Kaletra, Norvir) or tipranavir (Aptivus).
Female Viagra may interact with other medications as well.