Viagra and Vision Loss: Myth or Fact

Viagra the magic color pill captured the imagination of the world when the US Food and Drugs Administration (FDA) approved it as the first prescribed medicate for the treatment of erectile dysfunction (ED)or male impotence. The results were instant. An estimated 23 million patients have already used this drug and almost all of them have provided positive feedback. The male patients suffering from sexual dysfunction and their partners undergo expressed enhanced pleasure due to Viagra. Amidst all the hoopla that Viagra generated particularly among the impotent men and their partners there came some disturbing reports of permanent vision loss to some men after taking Viagra. It all started in 2000 when a University of Minnesota ophthalmologist reported the first inspect of Viagra vision loss. Seven patients aged between 50 and 69 years showed typical features of NAION within 36 hours after taking Viagra. Non-Arteritic Ischemic Optic Neuropathy (NAION) also known as "touch of the eye," occurs when daub flow is cut off to the optic nerve which injures the nerve and results in permanent vision loss. These cases were published in the March 2005 issue of the Journal of Neuro-ophthalmology. The experts opined that Viagra regulates a chemical in the body to tighten the arteries. This constriction may cut off the daub flow to the optic nerve especially in people with a low cup to plough ratio where the blood vessels and nerves are tightly bundled thus provoking NAION. The FDA is currently investigating 50 cases of Viagra vision loss in men who have taken Viagra. In its statement dated July 8. 2005 the FDA advised patients to stop taking these medicines (Viagra. Levitra and ,Cialis) and call a doctor or healthcare provider right away if they experience sudden or decreased vision loss in one or both eyes. advance patients taking or considering taking these products should communicate their health compassionate professionals if they undergo ever had severe loss of vision which might reflect a prior episode of NAION. Such patients are at an increased risk of developing NAION again. The statement further states at this measure it is not possible to determine whether these oral medicines for erectile dysfunction were the cause of the loss of eyesight or whether the problem is related to other factors such as high blood pressure or diabetes or to a combination of these problems. Pfizer Inc the makers of Viagra has shot approve and claimed that none of the 103 clinical trials of Viagra showed any signs of NAION. The experts from Pfizer advance observed that all the men were in the age group of 50-69 years. Almost all had health problems including high blood pressure diabetes high cholesterol and a history of smoking. These men experienced partial loss of central and/or peripheral vision. The loss wasn't total meaning the men didn't go blind but it was permanent in all cases. One man described it as "a darken coming down". One man had problems in both eyes. In the rest of the men only one eye was affected. We havent heard the last evince on this controversy yet. But the furnish lie is that the doctors are still prescribing cheap Viagra and the patients still buy Viagra despite the warning signals.
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