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Product Description

Produde not give Viagra to anyone under 18 years old viagra produce derrame cerebral tratamiento medical advice. How should I take Viagra. Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended. Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity.

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Detailed information

Contact your doctor if vision changes persist or are severe. Rarely, an eye problem called nonarteritic anterior ischemic optic neuropathy (NAION) has been reported in patients who took Viagra. This may lead to decreased vision or permanent loss of vision in some cases. If you notice a sudden decrease in vision or loss of vision in one or both eyes, contact your doctor right away.

The possibility of a link with blindness was raised publicly earlier this year, when Dr. Howard Pomeranz of the University of Minnesota reported in an ophthalmology journal seven patients who reported NAION vision loss occurring within 36 hours of a Viagra dose. ‚A definite causal relationship cannot be established at this time,‚ Pomeranz wrote. Viagra and its competitors work by slightly dilating arteries so that blood flow in the penis increases. Whether it affects blood flow to the eye isn‚t known, but Pomeranz argued that some effect on the optic nerve is plausible. So he urged that ophthalmologists ask NAION patients whether they use impotence drugs, and report any additional cases.

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