Viagra has been licensed to treat erectile dysfunction (also known as ED). This eMedTV Web page discusses how the prescription medication works, how and when to take it, and also provides information on side effects, dosing, and strengths.
Headache, dizziness, and nasal congestion are a few common Viagra side effects. This eMedTV page also lists rare side effects like migraines and fainting, as well as serious problems (such as a heart attack or stroke) seen in some people on Viagra.
Viagra is used primarily to treat erectile dysfunction (ED), or impotence. This eMedTV segment describes how Viagra works to treat ED, and also covers off-label Viagra uses, which include treating pulmonary hypertension and Raynaud's phenomenon.
Viagra improves erections in up to 88 percent of men. This eMedTV page describes the effects of Viagra in men with diabetes or spinal cord injuries -- and explains that Viagra is effective regardless of the cause or severity of erectile dysfunction.
As this eMedTV article explains, the recommended starting Viagra dosage is 50 mg, which may be taken anywhere from 4 hours to 30 minutes prior to sexual activity. This page lists factors that can affect your dose, including your age.
Alpha blockers, antifungals, and nitrates are among the drugs that can potentially interact with Viagra. This eMedTV page describes how Viagra drug interactions can cause changes in blood pressure or levels of Viagra in the blood, among other things.
Those who are allergic to Viagra or any of its components are among the people who shouldn't take the drug. This eMedTV page covers Viagra precautions and warnings, such as possible drug interactions and the risk of a stroke in some people on Viagra.
How long does Viagra last? In most people, Viagra lasts for about four hours. This eMedTV page lists factors that can increase how long Viagra lasts (such as certain other drugs) or decrease how long it lasts (such as taking it with a high-fat meal).
How does Viagra work? Viagra works by blocking PDE5, the chemical responsible for reversing an erection. This eMedTV Web page provides detailed information on how Viagra works, how long it takes to start working, and how long it typically lasts.
Blindness is an extremely rare side effect of Viagra (a drug used to treat erectile dysfunction). This eMedTV article provides information about Viagra and blindness, including what you should do if you notice any loss of vision.
Some herbal remedies for erectile dysfunction (ED) claim to be "herbal Viagra." But as this eMedTV page explains, no supplements or herbs have proven effective at treating ED. This page also lists considerations for people considering herbal Viagra.
A form of generic Viagra will not be available until after 2012, when the patent for the drug expires. This eMedTV Web page explains that when Viagra goes off-patent, several companies are expected to begin manufacturing a generic version of Viagra.
Viagra is not an addictive or habit-forming drug. However, as this eMedTV article explains, men with certain medical conditions may continue to need to take Viagra to achieve an erection (this does not mean that they have a Levitra addiction).
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