King of Pop Michael Jackson had a secret medical implant to stop him getting pleasure from opiates, according to reports.
The 'Thriller' star was fitted with the device, which dosed him with Narcan, in 2003 to battle the drug addiction that led to his death aged 50, reported Sun Online.
Narcan - trade name for naloxone - is prescribed for heroin or morphine addicts. It works by blocking pleasure receptors in the brain - making drug taking pointless.
The implant was found in Jackson's body after he died but has only just come to light in explosive newly released court papers.
They contain evidence from one of Jackson's former doctors, Beverly Hills anesthetist David Fournier who treated him in the 1990s and early 2000s.
"Fournier believed Jackson had deceived him by not telling him about a 'Narcan implant' Jackson had inserted before a surgical procedure Fournier was helping with," the papers state.
His testimony will be key evidence in the 26 billion pounds civil trial brought by Jackson's mum Katherine and his kids against concert giant AEG.
They accuse the firm's execs of negligence in employing doctor Conrad Murray, who gave the drugs to Jackson which led to his death in 2009.
AEG's lawyers deny the claims and insist the star hid his serious addictions from aides and family.
The Jacksons wanted the implant evidence thrown out but were overruled by the judge. The trial at LA Superior Court could last three months.
