The first Olympian disqualified for “banned substances” just had two beers to calm his nerves before the pistol shooting in 1968 Mexico Games.
Fast forward to the 1968 Olympics. Sweden’s Hans-Gunnar Liljenwall, was an emotional wreck shortly before the pistol event. A night of sleep didn’t calm him, and when it came time to compete he could barely focus. In an effort to steady his nerves, he drank two beers before going out to the pistol course.
He took his drug test, and got the news that Liljenwall had tested positive for alcohol following the pistol shooting.
His official Blood Alcohol Concentration exceeded 0.04, the limit the IOC had imposed for the games.