VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines. Do not take VIAGRA if you take any other medicines called "nitrates." Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke.

Do not take VIAGRA if you take medicines called guanylate cyclase stimulators which include:
Riociguat (Adempas®) is a medicine that treats pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension.

Tell all your healthcare providers that you take VIAGRA. If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took VIAGRA.

Stop sexual activity and get medical help right away if you get symptoms such as chest pain, dizziness, or nausea during sex.

Sexual activity can put an extra strain on your heart, especially if your heart is already weak from a heart attack or heart disease. Ask your doctor if your heart is healthy enough to handle the extra strain of having sex.

VIAGRA does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS.

VIAGRA is a prescription medicine used to treat erectile dysfunction (ED). You will not get an erection just by taking this medicine. VIAGRA helps a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated).

VIAGRA is not for use in women or children.

It is not known if VIAGRA is safe and effective in women or children under 18 years of age.

Do not take VIAGRA if you:
take medicines called nitrates (such as nitroglycerin)

use street drugs called "poppers" such as amyl nitrate or amyl nitrite, and butyl nitrate

take any medicines called guanylate cyclase stimulators such as riociguat (Adempas)

are allergic to sildenafil, as contained in VIAGRA and REVATIO, or any of the ingredients in VIAGRA. See the end of this leaflet for a complete list of ingredients in VIAGRA.

Before you take VIAGRA, tell your healthcare provider if you:
have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve or heart failure

have had heart surgery within the last 6 months

have pulmonary hypertension

have had a stroke

have low blood pressure, or high blood pressure that is not controlled

have a deformed penis shape

have had an erection that lasted for more than 4 hours

have problems with your blood cells such as sickle cell anemia, multiple myeloma, or leukemia

have retinitis pigmentosa, a rare genetic (runs in families) eye disease

have ever had severe vision loss, including an eye problem called non-arteritic anterior ischemic optic neuropathy (NAION)

have bleeding problems

have or have had stomach ulcers

have liver problems

have kidney problems or are having kidney dialysis

have any other medical conditions

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

medicines called nitrates

medicines called guanylate cyclase stimulators, such as Riociguat (Adempas)

medicines called alpha blockers such as Hytrin (terazosin HCl), Flomax (tamsulosin HCl), Cardura (doxazosin mesylate), Minipress (prazosin HCl), Uroxatral (alfuzosin HCl), Jalyn (dutasteride and tamsulosin HCl), or Rapaflo (silodosin). Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting.

medicines called HIV protease inhibitors, such as ritonavir (Norvir), indinavir sulfate (Crixivan), saquinavir (Fortovase or Invirase) or atazanavir sulfate (Reyataz)

some types of oral antifungal medicines, such as ketoconazole (Nizoral), and itraconazole (Sporanox)

some types of antibiotics, such as clarithromycin (Biaxin), telithromycin (Ketek), or erythromycin

other medicines that treat high blood pressure

other medicines or treatments for ED

VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. REVATIO is used to treat a rare disease called pulmonary arterial hypertension (PAH). VIAGRA should not be used with REVATIO or with other PAH treatments containing sildenafil or any other PDE5 inhibitors (such as Adcirca [tadalafil]).

Ask your healthcare provider or pharmacist for a list of these medicines, if you are not sure.

Know the medicines you take. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.

Take VIAGRA exactly as your healthcare provider tells you to take it.

Your healthcare provider will tell you how much VIAGRA to take and when to take it.

Your healthcare provider may change your dose if needed.

Take VIAGRA about 1 hour before sexual activity. You may take VIAGRA between 30 minutes to 4 hours before sexual activity if needed.

VIAGRA can be taken with or without food. If you take VIAGRA after a high fat meal (such as a cheeseburger and french fries), VIAGRA may take a little longer to start working

Do not take VIAGRA more than 1 time a day.

If you accidentally take too much VIAGRA, call your doctor or go to the nearest hospital emergency room right away.

VIAGRA can cause serious side effects. Rarely reported side effects include:

an erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, priapism can permanently damage your penis.

sudden vision loss in one or both eyes. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy (NAION). It is uncertain whether PDE5 inhibitors directly cause the vision loss. Stop taking VIAGRA and call your healthcare provider right away if you have sudden vision loss in one or both eyes.

sudden hearing decrease or hearing loss. Some people may also have ringing in their ears (tinnitus) or dizziness. If you have these symptoms, stop taking VIAGRA and contact a doctor right away.

The most common side effects of VIAGRA are:

headache

flushing

upset stomach

abnormal vision, such as changes in color vision (such as having a blue color tinge) and blurred vision

stuffy or runny nose

back pain

muscle pain

nausea

dizziness

rash

In addition, heart attack, stroke, irregular heartbeats and death have happened rarely in men taking VIAGRA. Most, but not all, of these men had heart problems before taking VIAGRA. It is not known if VIAGRA caused these problems.

Tell your healthcare provider if you have any side effect that bothers you or does not go away.

These are not all the possible side effects of VIAGRA. For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Store VIAGRA at room temperature between 68°F to 77°F (20°C to 25°C).

Keep VIAGRA and all medicines out of the reach of children.

Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use VIAGRA for a condition for which it was not prescribed. Do not give VIAGRA to other people, even if they have the same symptoms that you have. It may harm them.

This Patient Information leaflet summarizes the most important information about VIAGRA. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about VIAGRA that is written for health professionals.

For more information, go to www.viagra.com, or call 1-888-4VIAGRA

Active ingredient: sildenafil citrate