England have turned to sildenafil, the active ingredient in Viagra, as part of their preparation for their FIFA World Cup 2026 clash against Mexico at the iconic Estadio Azteca. The move is aimed at helping players cope with the effects of high altitude, with the stadium located approximately 7,350 feet above sea level. The use of sildenafil for altitude adaptation is not prohibited by the World Anti-Doping Agency (WADA), and sports scientists have previously studied its potential benefits in improving blood flow and oxygen delivery at high elevations. With Mexico enjoying a formidable home advantage at Estadio Azteca, England are exploring every legal avenue to prepare for one of their toughest tests of the tournament.