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    A high dose of the erectile dysfunction drug sildenafil citrate (Viagra) led to irreversible eye damage in a 31-year-old man, authors of a case study reported. The patient developed "persistent retinal toxicity" after taking far more than the recommended dose, Richard Rosen, MD, of New York Eye and Ear Infirmary of Mount Sinai in New York City, and colleagues wrote in The patient in question presented at an urgent care clinic complaining of red-tinted vision in both eyes. He had begun experiencing the symptoms 2 days earlier after ingesting liquid sildenafil citrate he had purchased over the internet from a non-pharmacy source. The patient further reported that he drank the sildenafil directly from the bottle and didn't know the exact dosage he ingested, but that it was much more than the recommended 50 mg dose. Visual disturbances are known to be potential side effects of sildenafil citrate. For example, one study found that a single oral dose of 100-mg sildenafil citrate given to healthy young men "led to small but statistically significant transient changes of outer and inner retinal function" that resolved in 24 hours. Here, the patient's symptoms failed to improve in the year after initial diagnosis, despite a wide variety of treatments, which included -- upon presentation -- topical prednisolone acetate four times a day in both eyes, brinzolamide 1% three times a day in both eyes, and brimonidine tartrate twice daily in both eyes. viagra cambridge This content has not been reviewed within the past year and may not represent Web MD's most up-to-date information. To find the most current information, please enter your topic of interest into our search box. 8, 2003 -- For men taking Viagra, an unnerving side effect -- light sensitivity, bluish-colored vision -- has been a concern. But there's no evidence that Viagra causes eye damage, even in those who take high doses, according to a new study. Since Viagra lowers blood pressure overall, there was a suspicion that the drug might decrease blood flow to optic nerves -- nerves that control vision -- which can cause nerve damage. However, this study of 13 men at Stanford University found that high doses of Viagra by and large preserved the thickness of the choroid layer of the eye, indicating that blood flow was normal. There were some small variations in thickness, which indicated that some men with an underlying blood vessel condition -- such as hardening of the arteries -- may indeed have changes in vision. The study appears in the November-December 2002 issue of Ophthalmologica.

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    Aug 27, 2018. According to a report by Columbia University in New York, Viagra is said to have the potential to “stop further loss of vision for patients” and that. cheap viagra for sale in australia Oct 1, 2018. High doses of the impotence drug commonly known as Viagra can cause damage to the eye's retina that results in irreversibly tinted vision. Nov 14, 2014. In clinical trials of the erectile dysfunction drug Viagra, it has been observed that high doses can cause transient visual disturbances in.

    "Viagra may permanently damage vision in some men, study finds," reports The Guardian. But the news is, in fact, based on research in mice. This research suggests the medication may not be suitable for men who carry a gene mutation associated with the inherited eye condition retinitis pigmentosa. Researchers found Viagra (the brand name of the drug sildenafil) caused visual disturbance in mice genetically engineered to carry a single copy of the retinitis pigmentosa mutation. It took two weeks for the mice's visual response to go back to normal. The researchers say this has human implications as 1 in 50 men are believed to be retinitis pigmentosa carriers. Retinitis pigmentosa is a hereditary condition that causes progressive loss of light reception and the outer fields of vision, leading to tunnel vision and blindness. 1, 2018 (Health Day News) -- High doses of the impotence drug commonly known as Viagra can cause damage to the eye's retina that results in irreversibly tinted vision, researchers contend in a case study."People who depend on colored vision for their livelihood need to realize there could be a long-lasting impact of overindulging on this drug," said lead investigator Dr. He directs retina services at the New York Eye and Ear Infirmary of Mount Sinai, in New York City. The study involved a 31-year-old man who went to an urgent care clinic because he'd had red-tinted vision in both eyes for two days. The problem began shortly after he took a dose of liquid sildenafil citrate that he'd bought online. The man told doctors he took much more than the recommended 50 milligram dose, which is used to treat impotence. Normal doses of the drug can cause vision problems, but symptoms typically disappear within 24 hours, the study authors noted. The man was diagnosed with persistent retinal toxicity linked to the high dose of sildenafil, which damaged the outer retina, the researchers said. Despite various treatments, the man's tinted vision hasn't improved more than a year after his diagnosis.

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    Can Viagra permanently damage vision? - Medical News Today, Viagra Linked to Trouble With Color Vision Report

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    Oct 29, 2001. Viagra and Vision. With an ex-Presidential candidate as its pitchman, more mentions on late-night talk shows than Joan Embry and the dubious. buy viagra online with discover card Jan. 8, 2003 -- For men taking Viagra, an unnerving side effect -- light sensitivity, bluish-colored vision -- has been a concern. But there's no evidence that Viagra. Oct 1, 2014. "Viagra may permanently damage vision in some men, study finds," reports The Guardian. But the news is, in fact, based on research in mice.

     
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