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Opioid drugs
AGONISTS
PARTIAL AGONISTS
Morphine
Buprenorphine
Codeine
Oxycodone
AGONIST-ANTAGONIST
Dihydrocodeine
Pentazocine
Hydromorphone
Butorphanol
Pethidine
Nalbuphine
Levorphanol
Dezocine
Oxymorphone
Meptazinol
Methadone
Fentanyl
ANTAGONISTS
Dextropropoxyphene
Naloxone
Diamorphine
Naltrexone (methylnaltrexone)
Tramadol
Naloxegol
Phenazocine
Dextromoramide