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• Viagra name: Sildenafil Citrate
•     Viagra approved as an impotence pill by US Food and Drug Administration (FDA) 27 March 1998, less than 6 months after Viagra’s submission
•     Viagra is made by Pfizer Pharmaceuticals, New York N.Y.
•     300,000 Viagra scripts written in three weeks in US
•     Viagra costs $10 a pill in US
•     Recommended dose is 50mg an hour before effect is desired - some need 100mg Viagra, others need only 25mg. Viagra should only be used maximum of once a day.
•     Viagra side effects are headache, flushing and indigestion. 3% report changes in vision - mainly colour perception.
•     Drop-out rates in treatment were low - 2.5% on Viagra compared to 2.3% on placebo
•     Viagra confers no resistance to AIDS or other sexually transmitted diseases and may increase risky behaviour.

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