TMZ is reporting that Michael Jackson’s toxicology reports show Propofol, the powerful drug believed to be behind the pop king’s death, but this drug wasn’t the only thing on board in the singer’s system.

Alprazolam, or Xanax, was also in Jackson’s system. This medicine is commonly used to treat anxiety, and could react with powerful anesthetic Propofol. This drug should only be administered in a controlled medical environment.