A player can be dismissed or disqualified from the NBA for testing positive for a drug of abuse, or if he is convicted of or pleads guilty to the use, possession or distribution of a drug of abuse.
The list of drugs of abuse includes amphetamines, cocaine, LSD and opiates such as heroin, codeine and morphine.
A third positive test for a performance-enhancing drug also leads to a player being dismissed and disqualified, as does being convicted of or pleading guilty to a crime involving the use, possession or distribution of one.