Opioid agonist-antagonist is :
Ans. is 'b' Pentazocine Opioid Agonist Antagonists Not used as analgesic - Nalorphine* levallorphan* Used as analgesic - Pentazocine* NalbuphinePure Opioid Antagonists :NaloxoneNaltrexonePartial weak agonistsBuprenorphineButorphanol
Pethidine
Pantazocine
Buprenorphine
Methadone
Opioids