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Beginning in about 30 minutes and for up to 4 hours, VIAGRA can help you get an erection if you are sexually excited.

Adult Dosing .

VIAGRA is a pill used to treat erectile dysfunction (impotence) in men. It can help many men who have erectile dysfunction get and keep an erection when they become sexually excited (stimulated). You will not get an erection just by taking this medicine. VIAGRA helps a man with erectile dysfunction get an erection only when he is sexually excited. When a man is sexually excited, the penis rapidly fills with more blood than usual.

Less common

After the man is done having sex, this extra blood flows out of the penis back into the body. If an erection lasts for a long time (more than 6 hours), it can permanently damage your penis. You should call a doctor immediately if you ever have a prolonged erection that lasts more than 4 hours. Some conditions and medicines interfere with this natural erection process. The penis cannot fill with enough blood.

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This is called erectile dysfunction if it becomes a frequent problem. Therefore sexual activity may not be advisable for people who have heart problems. Before you start any treatment for erectile dysfunction, ask your doctor if your heart is healthy enough to handle the extra strain of having sex. If you have chest pains, dizziness or nausea during sex, stop having sex and immediately tell your doctor you have had this problem. VIAGRA enables many men with erectile dysfunction to respond to sexual stimulation. If you take VIAGRA after a high-fat meal (such as a cheeseburger and french fries), the medicine may take a little longer to start working. VIAGRA can help you get an erection when you are sexually excited. You will not get an erection just by taking the pill. Like all medicines, VIAGRA can cause some side effects.

These effects are usually mild to moderate and usually don't last longer than a few hours. Some of these side effects are more likely to occur with higher doses. The most common side effects of VIAGRA are headache, flushing of the face, and upset stomach. Less common side effects that may occur are temporary changes in color vision (such as trouble telling the difference between blue and green objects or having a blue color tinge to them), eyes being more sensitive to light, or blurred vision. In rare instances, men taking PDE5 inhibitors (oral erectile dysfunction medicines, including VIAGRA) reported a sudden decrease or loss of vision in one or both eyes. It is not possible to determine whether these events are related directly to these medicines, to other factors such as high blood pressure or diabetes, or to a combination of these.

• Starting with 25 mg minimizes risk while determining individual response.
• The medication does not accumulate in the body with single, as-needed use.
• Severe allergic reactions (rash, swelling, difficulty breathing) are rare.
• Can interact with certain antibiotics and antifungal medications.
• Patients with retinitis pigmentosa have a higher risk of vision complications.
• An erection lasting more than 4 hours requires urgent urological care.
• Do not increase the dose without consulting your prescribing physician.
• Buying from unverified international websites carries significant health risks.
• It is not a performance-enhancing drug for athletes and is banned in some sports.
• Can be used by men with diabetes, but efficacy may be somewhat reduced.
• Open communication with your partner about ED treatment is often beneficial.

If you experience sudden decrease or loss of vision, stop taking PDE5 inhibitors, including VIAGRA, and call a doctor right away.

In rare instances, men have reported an erection that lasts many hours. You should call a doctor immediately if you ever have an erection that lasts more than 4 hours. If not treated right away, permanent damage to your penis could occur (see How Sex Affects the Body). Sudden loss or decrease in hearing, sometimes with ringing in the ears and dizziness, has been rarely reported in people taking PDE5 inhibitors, including VIAGRA. It is not possible to determine whether these events are related directly to the PDE5 inhibitors, to other diseases or medications, to other factors, or to a combination of factors. If you experience these symptoms, stop taking VIAGRA and contact a doctor right away. Heart attack, stroke, irregular heart beats, and death have been reported rarely in men taking VIAGRA. Most, but not all, of these men had heart problems before taking this medicine. It is not possible to determine whether these events were directly related to VIAGRA. VIAGRA may cause other side effects besides those listed on this sheet.

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VIAGRA can cause mild, temporary lowering of your blood pressure. You will need to have a thorough medical exam to diagnose your erectile dysfunction and to find out if you can safely take VIAGRA alone or with your other medicines. Your doctor should determine if your heart is healthy enough to handle the extra strain of having sex. Be sure to tell your doctor if you: have ever had any heart problems (e.g., angina, chest pain, heart failure, irregular heart beats, heart attack or narrowing of the aortic valve) have a rare inherited eye disease called retinitis pigmentosa have ever had any blood problems, including sickle cell anemia or leukemia are allergic to sildenafil or any of the other ingredients of VIAGRA tablets have a deformed penis, Peyronie's disease, or ever had an erection that lasted more than 4 hours have stomach ulcers or any types of bleeding problems Some medicines can change the way VIAGRA works. Tell your doctor about any medicines you are taking.

Raynaud's phenomenon

Do not start or stop taking any medicines before checking with your doctor or pharmacist. This includes prescription and nonprescription medicines or remedies: Remember, VIAGRA should never be used with medicines that contain nitrates (see VIAGRA Is Not for Everyone). If you are taking medicines called alpha-blockers for the treatment of high blood pressure or prostate problems, your blood pressure could suddenly drop. If you are taking a protease inhibitor, your dose may be adjusted (please see Finding the Right Dose for You). VIAGRA should not be used with any other medical treatments that cause erections.

Pregnancy Precautions

These treatments include pills, medicines that are injected or inserted into the penis, implants or vacuum pumps. 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. VIAGRA should not be used with REVATIO. VIAGRA comes in different doses (25 mg, 50 mg and 100 mg). If you want more information or develop any side effects or symptoms you are concerned about, call your doctor. In case of accidental overdose, call your doctor right away. Keep VIAGRA out of the reach of children. Store at 25°C (77°F); excursions permitted to 15–30°C (59–86°F) [see USP Controlled Room Temperature]. VIAGRA is a prescription medicine used to treat erectile dysfunction. Only your doctor can decide if it is right for you.

If you have any questions or want more information about VIAGRA, talk with your doctor or pharmacist, visit or call 1-888-4VIAGRA.

• The 25 mg tablet is a precise dose manufactured under strict quality controls.
• PDE5 is found in other tissues, explaining side effects like nasal congestion.
• It can be prescribed for off-label uses under a doctor's careful supervision.
• Men with unstable angina or uncontrolled arrhythmias should not use.
• The medication can be detected in urine drug tests designed for sildenafil.
• It is not a steroid and does not build muscle.
• Can improve erectile function in men with ED due to multiple sclerosis.
• The placebo effect in ED treatment trials is often significant.
• A vacuum constriction device is a non-pharmacological alternative.
• The goal of treatment is satisfactory sexual intercourse for the patient/partner.
• Disposal via drug take-back programs is preferred over flushing or trash.

Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to help a person get and keep an erection.

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If you do not get the results you expect, talk with your doctor. You and your doctor can determine the dose that works best for you. Do not take more VIAGRA than your doctor prescribes. If you think you need a larger dose of VIAGRA, check with your doctor. VIAGRA should not be taken more than once a day.

Taking Viagra with food

Your doctor may prescribe a lower dose of VIAGRA in certain circumstances. If you are older than age 65, or have serious liver or kidney problems, your doctor may start you at the lowest dose (25 mg) of VIAGRA. If you are taking protease inhibitors, such as for the treatment of HIV, your doctor may recommend a 25 mg dose and may limit you to a maximum single dose of 25 mg of VIAGRA in a 48 hour period. If you have prostate problems or high blood pressure for which you take medicines called alpha blockers, your doctor may start you on a lower dose of VIAGRA. Take VIAGRA about one hour before you plan to generic viagra professional sildenafil 100mg have sex. This drug does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis).

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When a man is sexually excited, VIAGRA helps the penis fill with enough blood to cause an erection. After sex is over, the erection goes away. As noted above (How Sex Affects the Body), ask your doctor if your heart is healthy enough for sexual activity. 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.

Does Viagra work the first time you use it?

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 (chest pain due to heart disease) such as: nitroglycerin (sprays, ointments, skin patches or pastes, and tablets that are swallowed or dissolved in the mouth) isosorbide mononitrate and isosorbide dinitrate (tablets that are swallowed, chewed, or dissolved in the mouth) Nitrates are also found in recreational drugs such as amyl nitrate or nitrite ("poppers"). If you are not sure if any of your medicines contain nitrates, or if you do not understand what nitrates are, ask your doctor or pharmacist. VIAGRA is only for patients with erectile dysfunction. VIAGRA is not for newborns, children, or women.

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Do not let anyone else take your VIAGRA. VIAGRA must be used only under a doctor's supervision. It is a treatment for erectile dysfunction. VIAGRA does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS. • WHAT TO TELL YOUR DOCTOR BEFORE YOU BEGIN VIAGRA Only your doctor can decide if VIAGRA is right for you. Using an effective barrier method (latex or polyurethane condom/dental dams) during sexual activity will help to decrease your risk of infection. This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional. Sildenafil is also available in other brands and strengths for high blood pressure in the lungs (pulmonary hypertension). Read the Patient Information Leaflet if available from your pharmacist before you start taking sildenafil and each time you get a refill.