Don't use Viagra with similar drugs such as tadalafil (Cialis) or vardenafil (Levitra).
Don't use Viagra in case you are additionally taking a nitrate medicine for chest ache or coronary heart troubles, including nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket), or recreational drugs like amyl nitrate or nitrite ("poppers").
Prior to taking Viagra, notify your medical professionsal about all other medicines you use for erectile dysfunction, or if you're using whichever of the following medicines:
bosentan (Tracleer);
cimetidine (Tagamet, Tagamet HB);
conivaptan (Vaprisol);
diclofenac (Arthrotec, Cataflam, Voltaren, Flector Patch, Solareze);
imatinib (Gleevec);
isoniazid (for treating tuberculosis);
rifampin (Rifadin, Rimactane);
an antidepressant corresponding to nefazodone;
an antibiotic such as clarithromycin (Biaxin), dalfopristin/quinupristin (Synercid), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin) or telithromycin (Ketek);
an antifungal medication such as clotrimazole (Mycelex Troche), itraconazole (Sporanox), ketoconazole (Nizoral), or voriconazole (Vfend);
heart or blood pressure treatment similar to diltiazem (Cardizem, Dilacor, Tiazac), doxazosin (Cardura), nicardipine (Cardene), quinidine (Quinaglute, Quinidex, Quin-Launch), or verapamil (Calan, Covera, Isoptin,Verelan); or
HIV/AIDS medicine corresponding to atazanavir (Reyataz), delavirdine (Rescriptor), fosamprenavir (Lexiva), indinavir (Crixivan), nelfinavir (Viracept), saquinavir (Invirase), or ritonavir (Norvir).
This record is not full and there could also be other drugs that can work together with Viagra. Notify your health care provider about all the prescription and non-prescription medications you take. This includes vitamins, minerals, herbal merchandise, and medicines permitted by additional healthcare professionals. Don't begin taking a new medicine with out notifying your health care professional.