Was Mr. Perry, whose struggles with substance abuse were widely known, a good candidate for a drug used to relieve depression? Doctors say his case raises thorny questions. Was Mr. Perry, whose struggles with substance abuse were widely known, a good candidate for a drug used to relieve depression? Doctors say his case raises thorny questions. Perry, Matthew, Ketamine (Drug), Drug Enforcement Administration, Food and Drug Administration, Psychedelic and Hallucinogenic Drugs, Drug Abuse and Traffic, Mental Health and Disorders, Depression (Mental), Psychiatry and Psychiatrists, Anesthesia and Anesthetics, Deaths (Fatalities), Addiction (Psychology) NYT > Science