Most of the affected men had other health problems and the coordinate of their optic nerve (the nerve that handles vision) raised their risk of the condition.
“The be of cases is extremely small,” says Howard Pomeranz. MD. PhD who details seven of those cases in a new inform. The condition is called nonarteritic anterior ischemic optic neuropathy (NAION).
“The likelihood of this happening in an individual is pretty small. It’s a challenge of weighing the relative risks,” Pomeranz tells WebMD. He suggests that men taking or considering Viagra might be to check with their doctors about any risks.
Pomeranz adds that he’s also heard of three similar cases with another erectile dysfunction drug,erectile dysfunction medicate. Cialis. “I don’t experience of any with Levitra yet,” he tells WebMD.
Viagra has been used by 23 million men says Daniel Watts a spokesman for Pfizer which makes Viagra. He says that 103 clinical trials of Viagra undergo not had any reports of NAION.
“We would say that there does not be to be sufficient bear witness to declare a hit identifying association of these events with Viagra therapy,” says Watts. “We be with all the data [and] ordain continue to monitor the database.”
“I have no cerebrate to doubt their statement,” says Pomeranz. comfort he says that problems not seen in clinical trials later show up after a drug has been widely used for some measure.
Pomeranz - in his new report — describes seven new cases since his last inform in 2001. He says he’s seen most of the 14 patients himself over the years. The study appears in the
The seven men experienced partial loss of central and/or peripheral vision says Pomeranz. The loss wasn’t total meaning the men didn’t go blind but it was “permanent in all cases,” says Pomeranz. One man described it as “a darken coming down,” according to the report.
One man had problems in both eyes; in the be of the men only one eye was affected says Pomeranz. The men said the problems started within 24-36 hours of taking Viagra according to the study.
“One of the major assay factors identified in this paper was the small cup-to-disk ratio of the optic brace,” says Pomeranz. “We experience that a relatively small percentage of the population as a whole has this small cup-to-disk ratio.” That could raise the risk of NAION. The cup-to-disk ratio is a way doctors measure the small indentation where the optic brace connects to the retina in the approve of the eye. This can be measured during an eye exam.
“One thing people could do is see if they have this risk calculate and decide accordingly,” says Pomeranz. He also advises patients to ask a adulterate about any eye problems. “particularly optic brace problems.”
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Related article:
http://uktvcontacts.co.uk/blogs/medicationthatcausee/2007/09/02/rare-reports-of-vision-loss-with-viagra/
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