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Author: Admin | 2025-04-28
Viagra may cause loss of vision in men with retinitis pigmentosaRetinitis pigmentosa is a rare inherited eye condition causing sight loss Some people have normal vision but carry one gene for the conditionIngredient in Viagra linked to degenration and death of cells in the retinaPeople with retinitis pigmentosa and those who carry the gene at risk PUBLISHED: 10:36 GMT, 1 October 2014 | UPDATED: 14:11 GMT, 1 October 2014Viagra could cause blindness in men with eye problems, and even those with seemingly normal vision, a new study has found.Australian researchers say an ingredient in anti-impotence drugs may permanently affect the vision of men with an inherited eye condition.It could also affect those with normal sight who carry one gene which is linked with developing eye problems.Scroll down for video Viagra could cause blindness in men with inherited eye condition retinitis pigmentosa - or those with normal sight who carry the gene for the condition, Australian researchers have foundOne theory is that erectile dysfunction drugs may obstruct an enzyme which is important for transmitting light signals from the retina to the brain.It is already known that sildenafil, the active ingredient in the erectile dysfunction medication, can cause temporary vision problems in some healthy people.Doctors have now warned it could also cause permanent damage to the eyes of people retinitis pigmentosa.People with normal sight that carry the gene for the condition may also be at risk, experts warn.Retinitis pigmentosa is a rare hereditary condition that causes the cells in the retina - the area of the back of the eye which detects light - to degenerate and die.This can lead to difficulty seeing in dim light, loss of peripheral vision, and sometimes blindness. About one in 50 people are likely to be carriers of genes which lead to the degeneration of cells in the retina.OTHER PROBLEMS LINKED WITH ANTI-IMPOTENCE DRUGS Loss of hearingIn 2011, Viagra and similar impotence drugs were linked to hundreds of cases of sudden hearing loss around the world.Research published in the journal The Laryngoscope said it was not clear how long the problems lasted, but this type of hearing loss - more commonly due to infections and exposure to loud noise - usually causes permanent damage in up to a third of cases.Skin cancerEarlier this year, American researchers found that men who used Viagra were 84 per cent more likely to get melanoma, the most deadly form of skin cancer.It is thought the impotence drug may affect the same genetic mechanism that enables skin cancer to become more invasive.In the new study, researchers from the University of New South Wales, Australia, tested sildenafil on healthy mice and mice with one copy of this mutant gene.They found the healthy
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