Diprivan (also known as Propofol) -- the strong medication allegedly administered to Michael Jackson prior to his death -- might not be detectable in toxicology reports, CNN's chief medical correspondent Dr. Sanjay Gupta told Larry King Wednesday night.
"It's not a routine toxicology test," Gutpa said of the Thriller singer's post-death examination. He thinks they likely wouldn't have spotted traces of the powerful narcotic "unless they knew to check for it, because it disappears from the body so quickly, you may not be able to test for it directly."
Gupta said that alternate routes of examining for Diprivan might be via fat and hair samples.
"Sometimes it breaks down into various by-products, and sometimes you can test for those by-products, not specific for Diprivan," he said. "But it may give you a pretty good idea."
Jackson died after suffering a sudden cardiac arrest June 25 in Los Angeles. Results of his autopsy have not yet been released.