COMPLEX ACTION OPIOIDS & OPIOID ANTAGONISTS

1. COMPLEX ACTION OPIOIDS
    a. Agonist-antagonists (κ-analgesics)
                Nalorphine
                Pentazocine
                Nalbuphine
                Butorphanol

    b. Partial/weak μ  agonist + κ  antagonist
                Buprenorphine

2. PURE OPIOID ANTAGONISTS
                Naloxon
                Naltrexone
                Nalmefene