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Viagra Causes Rare Vision Problem

George Spellwin

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November 17, 2000


Ophthalmologists report that a small number of men have suffered permanent vision loss apparently after using the anti-impotence drug Viagra (sildenafil). The men experienced vascular lesions -- essentially small strokes -- in their eyes, according to a report from the Dallas Morning News reprinted in the Detroit Free Press.
Doctors at Pfizer, the drug's manufacturer, have long known that Viagra can cause a curious but temporary form of color blindness in which some men see the world as if they were wearing blue-colored glasses. That's because the drug interferes with an enzyme called phosphodiesterase-5. Blocking this enzyme allows erections to last longer but it also interferes with the way the retina delivers some visual signals to the brain. Men using Viagra who experience this effect are not considered at risk of permanent vision loss.

News of the vision problems should come as a warning to healthy, non-impotent men who use Viagra as a recreational drug. The drug has become a big money-maker for some questionable doctors and pharmacists who sell it through the Internet or through telephone orders. The Des Moines Register describes the shady dealings of a West Virginia pharmacy investigated earlier this year.

Doctors have always warned men with heart disease against using Viagra if they also take nitroglycerin or other nitrate drugs to relieve the pain of angina. A report from Ananova confirms that several deaths have been attributed to men using both drugs before sex.

Men looking for a healthier way to treat impotence might consider an exercise program instead of drugs. A previous HealthScout story explains that exercise improves circulation and can reduce impotence in many men.

Attribution: -- Jeff Johnston




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Yours in sport,

George

George Spellwin
Research Director

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I will say this much, i have definitely seen some trails and shit after using it, visual disturbances whatever you wanna call it.

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