Well-known as Viagra, sildenafil is used in patients with impotence, or erectile dysfunction. A brand name of sildenafil, Revatio is helpful in conditioning both men and women and in treating hypertension related to pulmonary arteries. Its effect is connected with muscle relaxation and augmented blood flow, but only to certain zones of the body.

Be sure to consult with your physician if any of the cases listed here applies to you: a stomach ulcer; hypertension or low blood pressure; prohibition of sexual contacts by a healthcare professional; heart disease or arrhythmia (especially with a heart attack or stroke in the past half a year); liver or kidney problems; myeloma, hemophilia, leukemia, sickle cell anemia, and other blood disorders; coronary artery disease or congestive heart failure; retinitis pigmentosa; Peyronie's disease or other penis defects.

Tell your physician of any known medicine allergy. In some cases additional tests and dose corrections will be needed for your complete safety.

A daily dose (during every 24 hours) of Revatio is limited to a single pill.

Revatio is absolutely not compatible with nitrate-containing drugs. Combining them results in a sudden drop of blood pressure with a consequent fainting or even heart stroke. Widespread nitrate medicines include isosorbide mononitrate (found in Monoket, and Imdur), nitroglycerin (as in Nitrolingual, Nitro-Bid, and several other drugs for problems with heart and chest), isosorbide dinitrate (two of examples are Sorbitrate and Dilatrate-SR). Please, be careful as nitrates are present in so called recreational poppers (in the form of nitrite or amyl nitrate).

Seek medical help right away if you feel dizziness, nauseate, pain, numbness during sexual contact (unpleasant feelings can arise in arms, chest, jaw, or your neck). Consult with your doctor in case of common side effects, or if your erection is painful. An erection that lasts more than 4 hours is called priapism and should be treated by a healthcare professional.

Another possible side effect of Revatio is a cutback of blood flow to the eyeball optic nerve. Few patients taking Revatio reported a sudden loss of eyesight, which may be or may be not connected to Revatio. In any case, go to an emergency room immediately in case of such an effect. Among factors adding to the possibility of sudden vision loss are hypertension, high cholesterol level, heart diseases, diabetes, smoking, age of more than 50 years and persistent eye problems.

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