As far as athletes are concerned, there is more than one type of endurance. And so the World Anti-Doping Agency, the body that monitors the use of drugs that enhance sporting prowess, is considering adding Viagra to its list of illegal substances, The Mail writes.

The impotence pill is currently not an illegal substance in world sports, but athletes have found Viagra oosts blood flow to their lungs. WADA will conduct research into the effects of the drug, but the results are expected until next year, the paper writes.

Meanwhile, this means that competitors at the Beijing Olympics will still be able to take Viagra, which has come to be nicknamed ‘Vitamin V’ in sporting circles, the paper notes. Christiane Ayotte, a scientist at a lab accredited by WADA tells the Mail she regularly finds Viagra and a similar drug, Cialis, in the urine samples of male competitors.

“Each time there is a seizure of banned drugs you can be sure that there’s Viagra and Cialis found as well,” she tells the Mail. As well as boosting the blood supply to muscles - which is helpful in sprinting - the drug’s may also enhance endurance, especially when competitors are breathing at high atltitudes or in in polluted conditions, such as at Beijing.

Hat tip to Pharmagossip