Michael Jackson had taken a lethal amount of the anesthetic propofol and Xanax , according to the toxicology report, the TMZ.com reported Friday.

The report said citing multiple law enforcement sources, two kinds of drugs, the anesthetic Propofol the pop star used to sleep and the alprazolam, known as Xanax used to treat anxiety were found in Michael Jackson's system.

Chris Carter, a former bodyguard of Michael Jackson told Santa Barbara County Sheriff's Deputies he would pick up prescriptions for Xanax for Jackson at various pharmacies, and that Jackson was taking 10 plus Xanax pills a night.

A law enforcement official who spoke to the Associated Press on condition of anonymity because the investigation is going, said hours before Michael Jackson's death, his doctor administered multiple sedatives along with a powerful anesthetic.

It's a safe combination if done properly; potentially lethal if not.

 The official said Dr. Conrad Murray told investigator the doses were within normal medical guidelines.

The official also said the type of sedatives Dr. Conrad Murray gave Jackson were benzodiazepines, often used to calm patients before surgery.