A doctor who supplied "Friends" star Matthew Perry with ketamine in the months before he fatally overdosed, is to be sentenced in Los Angeles on Wednesday.

Salvador Plasencia, 43, one of five people charged over Perry's death, has admitted to four counts of distribution of ketamine.

He faces up to 40 years in prison as well as a fine that could run into millions of dollars. He will also surrender his medical license.

At an earlier hearing, Plasencia's attorney, Karen Goldstein, said her client regretted his actions.

"Dr. Plasencia is profoundly remorseful for the treatment decisions he made while providing ketamine to Matthew Perry," Goldstein said in a statement.

"He is fully accepting responsibility...acknowledging his failure to protect Mr. Perry, a patient who was especially vulne

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