WHAT IS VIAGRA?
VIAGRA (Sildenafil) is a pill used to treat erectile dysfunction in men. VIAGRA enables many men with erectile dysfunction to respond to sexual stimulation. 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.
How Sex Affects the Body When a man is sexually excited, the penis rapidly fills with more blood than usual. The penis then expands and hardens. This is called an erection. After the man is done having sex, this extra blood flows out of the penis back into the body. The erection goes away. 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. The man cannot have an erection. This is called erectile dysfunction if it becomes a frequent problem.
During sex, your heart works harder. 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.
WHAT VIAGRA DOES NOT DO
- VIAGRA does not cure erectile dysfunction. 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.
- VIAGRA is not a hormone or an aphrodisiac.
HOW TO TAKE VIAGRA
Take VIAGRA about one hour before you plan to have sex. Beginning in about 30 minutes and for up to 4 hours, VIAGRA can help you get an erection if you are sexually excited. 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.FINDING THE RIGHT DOSE FOR YOU
VIAGRA comes in different doses (25 mg, 50 mg and 100 mg). 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.
VIAGRA IS NOT FOR EVERYONE
As noted above, 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. 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)
VIAGRA is only for patients with erectile dysfunction. VIAGRA is not for newborns, children, or women. Do not let anyone else take your VIAGRA. Sildenafil citrate must be used only under a doctor's supervision.
WHAT TO TELL YOUR DOCTOR BEFORE YOU BEGIN VIAGRA
Only your doctor can decide if VIAGRA is right for you. Sildenafil citrate 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, or heart attack)
- have ever had a stroke
- have low or high blood pressure
- have a rare inherited eye disease called retinitis pigmentosa
- have ever had any kidney problems
- have ever had any liver problems
- 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
- are taking any other medicines
VIAGRA AND OTHER MEDICINES
Some medicines can change the way VIAGRA works. Tell your doctor about any medicines you are taking. 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. If you are taking a protease inhibitor, your dose may be adjusted as noted above. VIAGRA should not be used with any other medical treatments that cause erections. These treatments include pills, medicines that are injected or inserted into the penis, implants or vacuum pumps.POSSIBLE SIDE EFFECTS
Like all medicines, Sildenafil citrate) 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 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.
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 here. If you want more information or develop any side effects or symptoms you are concerned about, call your doctor.
STORING VIAGRA
Keep VIAGRA out of the reach of children. Keep it in its original container. Store at room temperature, 59°-86°F (15°-30°C).
NEWLY DISCOVERED USES (OFF-LABEL)
Anal fissure, dyspareunia, esophageal motility disorders, female orgasmic disorder secondary to SSRI use, pulmonary hypertension
FOOD INTERACTIONS
Grapefruit juice, high fat meal. Avoid substantial alcohol intake.
HERBAL INTERACTIONS
St. John's wort
PREGNANCY AND BREAST-FEEDING CAUTIONS
FDA Pregnancy Risk Category B. Not for use in women, and not recommended during breast-feeding.
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Sildenafil is normally prescribed for the treatment of impotence, but does not cause sexual stimulation. Rather, it solves an underlying problem that causes impotence. It enhances nitric oxide-induced relaxation of smooth muscles.
Viagra
GENERIC NAME
Sildenafil
CHEMICAL CLASS
CGMP specific phosphodiesterase inhibitor
THERAPEUTIC CLASS
Anti-impotence agent
Tablets - Oral 25 mg, 50 mg, 100 mg.
Adult
PO: 50 mg approx 1 hr before sexual activity. Dosage range 25-100 mg. Max recommended use once/day. Decrease dose in elderly (>65), hepatic dysfunction, renal insufficiency (CrCl <30 ml/min).