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Viagra may have longterm effect on vision

Oct 01, 2014    

Sydney An active ingredient in the erectile dysfunction drug Viagra could cause unusual visual responses in people who carry a common mutation that leads to an eye disease and may have longterm detrimental effects on their vision, researchers warn.Sildenafil can inhibit an enzyme which is important for transmitting light signals from the retina to the brain.It is already known from clinical trials of Viagra that its use in high doses can cause transient disturbances in the vision of some healthy people."Side effects can include sensitivity to bright light, blurred vision and altered colou...

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