Some Viagra users report blindness to FDA
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Manufacturing News, Source : TheManufacturer.com
Published : 27 May 2005 18:41
The US Food and Drug Administration announced that it has received some 38 reports of a rare condition, called non-arteritic anterior ischemic optic neuropathy, among users of Pfizer’s impotency drug Viagra. The condition can cause permanent blindness.
The FDA also has received four reports of blindness among users of Eli Lilly's impotency drug Cialis, and one report in a man taking GlaxoSmithKline’s Levitra.
It is unknown whether there is a definite link between the drugs and the rare condition, but reports of a possible link go as far back as 2001. Viagra has been used by more than 23 million men worldwide since its introduction in 1998.
Pfizer is currently weighing a label change to include a warning, though the company stressed that there was no proof of a causal link. Viagra had $1.68 billion in sales last year.
Coincidentally, Pfizer had announced earlier this week that it had entered into a drug-discovery collaboration with Isis Pharmaceuticals to identify second-generation antisense drugs for the treatment of ophthalmic disease.
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posted by John G on Fri 10 Aug 07 16:52
The link between Viagra and blindness may lie in the unspoken facts.Impotency can be very frustrating for the formerly sexually active man.This can result in very intensive masturbation with high mental concentration in trying to achieve a result. This from my own experiance, can lead to memory loss and vision problems at least in the short term.Perhaps Pfizer could benefit by revisiting these cases and asking further questions of the sufferers.