How to avoid possible adverse effects?
If you take any medicines that contain nitrates – either regularly or as needed – you should never take Viagra. If you take Viagra with any nitrate medicine or recreational drug containing nitrates, your blood pressure could suddenly drop to an unsafe level. You could get dizzy, faint, or even have a heart attack or stroke. Nitrates are found in many prescription medicines that are used to treat angina. Below you can find a list of commonly prescribed short- and long-acting nitrates available in the United States:
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Nitroglycerin
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Deponit
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Minitran
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Nitrek
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Nitro-Bid
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Nitrocine
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Nitro-Derm
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Nitro
Disc
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Nitro-Dur
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Nitrogard
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Nitroglycerin
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Nitroglycerin
T/R
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Nitroglyn
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Nitrol
Ointment
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Nitrolan
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Nitrolingual
Spray
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Nitrong
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Nitropar
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Nitropress
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Nitroprex
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Nitro S.A.
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Nitrospan
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Nitrostat
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Nitro-Trans
System
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Nitro
Transdermal
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Nitro-Time
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Transderm-Nitro
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Tridil
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Isosorbide
Mononitrate
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Imdur
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ISMO
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Isosorbide
Mononitrate
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Monoket
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Isosorbide
Nitrate
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Dilatrate-SR
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Iso-bid
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Isordil
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Isordil
Tembids
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Isosorbide
Dinitrate
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Isosorbide
Dinitrate LA
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Sorbitrate
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Sorbitrate
SA
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Pentaerythritol
Tetranitrate
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Peritrate
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Peritrate
SA
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Erythrityl
Tetranitrate
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Cardilate
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Isosorbide
Dinitrate/Phenobarbital
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Isordil
w/PB
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Do not use the drug amyl nitrite (sometimes called "poppers") while you are taking Viagra.
When Viagra is co-administered with an alpha-blocker, patients should be stable on alpha-blocker therapy prior to initiating Viagra treatment and Viagra should be initiated at the lowest dose.
Tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take, especially alpha blockers such as:
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alfuzosin
(Uroxatral)
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doxazosin
(Cardura)
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prazosin
(Minipress)
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tamsulosin
(Flomax)
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terazosin
(Hytrin)
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amiodarone
(Cordarone, Pacerone)
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amlodipine
(Norvasc)
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certain
antifungals such as:
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fluconazole
(Diflucan)
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griseofulvin
(Fulvicin, Grifulvin, Gris-PEG)
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itraconazole
(Sporanox)
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ketoconazole
(Nizoral)
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and
voriconazole (Vfend)
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aprepitant
(Emend)
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carbamazepine
(Carbatrol, Epitol, Tegretol)
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cimetidine
(Tagamet, Tagamet HB)
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clarithromycin
(Biaxin, in Prevpac)
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cyclosporine
(Neoral, Sandimmune)
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delaviridine
(Rescriptor)
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dexamethasone
(Decadron, Dexpak)
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diltiazem
(Cardizem, Dilacor, Tiazac, others)
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efavirenz
(Sustiva)
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erythromycin
(E.E.S., E-Mycin, Erythrocin)
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fluoxetine
(Prozac, Sarafem)
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fluvoxamine
(Luvox)
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HIV
protease inhibitors:
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atazanavir
(Reyataz)
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indinavir
(Crixivan)
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lopinavir
(in Kaletra)
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nelfinavir
(Viracept)
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ritonavir
(Norvir, in Kaletra)
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saquinavir
(Fortovase, Invirase)
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lovastatin
(Advicor, Altocor, Mevacor)
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nefazodone
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nevirapine
(Viramune)
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other medications or devices to treat erectile dysfunction
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Phenobarbital
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phenytoin
(Dilantin, Phenytek)
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rifabutin
(Mycobutin)
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rifampin
(Rifadin, Rimactane)
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sertraline
(Zoloft)
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troleandomycin
(TAO)
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verapamil
(Calan, Covera, Isoptin, Verelan)
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zafirlukast
(Accolate).
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Tell your doctor what herbal products you are taking or plan to take, especially St. John's wort. Also inform your doctor if you smoke.
If you are having surgery, including dental surgery, tell your doctor or dentist that you take Viagra.
Tell all your health care providers that you are taking Viagra. If you ever need emergency medical treatment for a heart problem, the health care providers who treat you will need to know when you last took Viagra.
Viagra is only for patients with erectile dysfunction. Viagra is not for newborns, children, or women. Do not allow anyone else take your Viagra. It must be used only under a doctor's supervision.
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