A doctor who sold ketamine to ‘Friends’ star Matthew Perry before his overdose death has been sentenced to 2 1/2 years in prison. A federal judge in Los Angeles handed down the prison sentence plus two years of probation to 44-year-old Dr. Salvador Plasencia on Wednesday. Plasencia admitted to illegally selling ketamine to Perry, knowing he was a struggling addict. Plasencia has surrendered his medical license and pleaded guilty to four counts of distribution. Prosecutors said the ketamine that killed Perry was not provided by Plasencia, but his actions contributed to Perry’s harm.