Little info about Viagra

Viagra is well-known medicine for erectile dysfunction (impotence) treatment.
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What is Viagra?

Viagra (sildenafil) relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body.

Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.

Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Important information

Some medicines can cause unwanted or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially riociguat (Adempas).

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.

Stop using Viagra and get emergency medical help if you have sudden vision loss.

Before taking this medicine

You should not use Viagra if you are allergic to sildenafil, or:

  • if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas).

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

To make sure Viagra is safe for you, tell your doctor if you have ever had:

  • heart disease or heart rhythm problems, coronary artery disease;

  • a heart attack, stroke, or congestive heart failure;

  • high or low blood pressure;

  • liver or kidney disease;

  • a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;

  • a bleeding disorder such as hemophilia;

  • a stomach ulcer;

  • retinitis pigmentosa (an inherited condition of the eye);

  • a physical deformity of the penis (such as Peyronie's disease); or

  • if you have been told you should not have sexual intercourse for health reasons.

Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss.

Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Do not give Viagra to anyone under 18 years old without medical advice.

How should I take Viagra?

Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.

During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of Viagra.

Store at room temperature away from moisture and heat.

See also: Dosage Information (in more detail)

What happens if I miss a dose?

Since Viagra is used as needed, you are not likely to miss a dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking Viagra?

Drinking alcohol with this medicine can cause side effects.

See also: Viagra and alcohol (in more detail)

Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking Viagra.

Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.

Viagra side effects

Get emergency medical help if you have signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking Viagra and get emergency medical help if you have:

  • heart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;

  • vision changes or sudden vision loss; or

  • erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Call your doctor at once if you have:

  • ringing in your ears, or sudden hearing loss;

  • irregular heartbeat;

  • swelling in your hands, ankles, or feet;

  • shortness of breath;

  • seizure (convulsions); or

  • a light-headed feeling, like you might pass out.

Common Viagra side effects may include:

  • flushing (warmth, redness, or tingly feeling);

  • headache, dizziness;

  • abnormal vision (blurred vision, changes in color vision)

  • runny or stuffy nose, nosebleeds;

  • sleep problems (insomnia);

  • muscle pain, back pain; or

  • upset stomach.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

Viagra dosing information

Usual Adult Dose for Erectile Dysfunction:

Initial dose: 50 mg orally once a day, as needed, 1 hour prior to sexual activity Maintenance: 25 to 100 mg orally once a day, as needed, 1 hour prior to sexual activity Comments: This drug may be taken anywhere from 30 minutes to 4 hours before sexual activity. Use: Treatment of erectile dysfunction

Usual Geriatric Dose for Erectile Dysfunction:

Initial dose: 25 mg orally once a day 1 hour prior to sexual activity Use: Treatment of erectile dysfunction

What other drugs will affect Viagra?

Do not take Viagra with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.

Tell your doctor about all your current medicines and any you start or stop using, especially:

  • drugs to treat high blood pressure or a prostate disorder;

  • an antibiotic - clarithromycin, erythromycin, or telithromycin;

  • antifungal medicine - ketoconazole or itraconazole; or

  • medicine to treat HIV/AIDS - atazanavir, indinavir, ritonavir, or saquinavir.

This list is not complete. Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Viagra only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Copyright 1996-2018 Cerner Multum, Inc. Version: 12.01.

Medical Disclaimer

Useful information about Viagra

280bddbe.pngHow to get the best result?

Taking Viagra, do not forget about the following tips.

1. You should have the mood "for it."

You must have wish. The drug starts to work only if you are sexually excited. After each sexual intercourse, your erection will be held, as it usually happens, and will re-appear if youre there sexual arousal.

2. Only patience.

the drug works for 4 hours, you will agree that this is a rather large period in order to escape from the unimportant things, fully relax, focus all attention on obtaining a sense of satisfaction. 4 hours the drug can aid as many times as You need. You should take the drug before 30-60 minutes planned intimacy. You may find that You are the drug acts faster. Every third of men the effect starts after about 15 minutes. Normal taking of the drug in necessary dosage about an hour before sex.

3. Eat less

the drug will aid you with erection despite on the meal. That is, you can quite easily make a dinner, during which unbeknownst to take the drug. The only thing you should not forget that if You pre-ate, the development effects of the drug may come a little later, although with the same result.

4. Want more ...

Most men the drug aids already from the first or second dose. However, some men need more attempts. Don't give up. the drug aids 4 out of five men at problems with erection. Try to take the drug next time.The maximum dose of the drug per day the drug 100 mg can be taken every day easily and without problems.

How starts to work Viagra

The results of clinical tests of Viagra were given ambiguous and conflicting results regarding the start time of action of the drug. In the first case, the effect of Viagra started action only after two hours after taking the drug with it food, and in another study, almost instantly, after a quarter of an hour after 1 tablet containing 100 mg active substance was washed down with plenty of cold boiled water. In actual practice, this particular drug starts its work within 30-60 minutes after it was accepted. As we have already mentioned, the duration of action of Viagra is a little more than four hours. The active substance of Viagra — sildenafil citrate is fairly well absorbed into the blood, particularly after administration of 1 tablet containing 100 mg of the basic substance, the maximum concentration of drug in the blood on an empty stomach occurs within a half hour to an hour. But if the use of Viagra occurs in combination with fatty and hard to digest foods, the time of full absorption in the blood automatically increases approximately up to half an hour. The initial dosage should be 50 mg, and a half a regular tablet, and not earlier than 45 minutes before the expected sexual contact. Taking into account the individual characteristics of the organism and health, the substance dose can be increased to 100 mg or decrease its consumption to 25 mg. It is better to discuss the dosage with your doctor. The acceptance of Viagra should occur no more than once in 24 hours.

09bef59c.pngWho can not apply?

It is not recommended to take Viagra, or sildenafil-containing medications if a man has this problems: anatomical deformity of the penis; angolazione processes; venous fibrosis; Peyronie's disease; myeloma in different degrees; blood cancer; ulcer of the stomach or intestinal tract; the presence of angina or heart failure; post-myocardial infarction or post-stroke condition; instability of blood pressure.

Can I take Viagra with alcohol and food?

Yes. Just do not forget that alcohol consumption can temporarily alter the ability to achieve an erection. A small amount of alcohol will relieve the feeling of stiffness.

What to do if Viagra is not working?

It is possible that first You need to take Viagra three or four times before it starts to work the most for You. Or maybe You need a different dose. The maximum dose of Viagra per day is 100 mg. Proved that Viagra is effective in 4 out of 5 men with erectile dysfunction. If viagra did not work, you should better to visit a doctor.

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