What drug did Chris ‘Birdman’ Andersen use to get kicked out of the NBA?

It wasn’t performance enhancing (you have to be test positive for steroids 4 times and he tested positive for a ‘drug of abuse’) or marijuana so what was the birdman using??
btw drugs of abuse include
methamphetamine; cocaine; LSD; opiates, including heroin, codeine and morphine; and PCP.
i bet it was cocaine… 🙂
the penalty for marijuana is a 5 game suspension…