The search for nonaddicting strong analgesics: hopes and frustrations.
D000700:Analgesics; D000818:Animals; D006801:Humans; D009020:Morphine / Q000627:therapeutic use; D009292:Narcotic Antagonists; D009294:Narcotics; D013329:Structure-Activity Relationship; D013375:Substance Withdrawal Syndrome; D019966:Substance-Related Disorders / Q000517:prevention & control*
D000700:Analgesics; D009292:Narcotic Antagonists; D009294:Narcotics; D009020:Morphine