Dr. Salvador Plasencia agreed last month to plead guilty to giving the Friends actor ketamine in the lead up to his death. He faces up to 40 years in prison.View on euronews

Jasveen Sangha — referred to as "The Ketamine Queen," according to U.S. Attorney Martin Estrada — is charged with several counts related to allegedly distributing ketamine and methamphetamine. She has pleaded not guilty and is scheduled to go to trial in August, according to the Associated Press.

A doctor who was a primary target in the sweeping investigation of actor Matthew Perry’s overdose death pleaded guilty Wednesday to supplying the “Friends” star with ketamine despite knowing he was a struggling addict.