The Mexico City Olympics held in 1968 were the first to introduce drug testing for medallists, with urine taken and analyzed for narcotics and stimulants. Consequently, these Games saw the first ever drugs disqualification, with the Swedish pentathlete Hans-Gunnar Liljenwall testing positive for excessive alcohol. He had allegedly drunk some beer prior to the pistol shooting to calm his nerves and was later stripped of the bronze medal he went on to win.