It all started when a group of men volunteered for an ordinary medical trial - but a surprising side effect was unprovoked erections. Ahead of BBC's Men Up, we take a look at the true story behind Viagra
Hard erections were a surprising side effect of a clinical trial back in 1989 and the result was a game changer for men suffering from erectile dysfunction around the globe. We delve into the origins of Viagra ahead of a new BBC documentary
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