"The Viagra family of drugs is considered effective in these conditions because when there is a long shortage in oxygen it leads to high blood pressure in the lungs, and the drugs help fight that"

It might harm their reputation, but Israel's air force is considering giving its combat pilots Viagra to improve their performance in the air. via Fox News

Read more at: http://www.topix.com/health/erectile-dysfunction/2008/02/israels-air-force-considers-giving-pilots-viagra?fromrss=1.