Agonist/Antagonist Opioid Analgesics. When a affected individual has Formerly acquired or is at present undergoing a program of therapy with a pure opioid agonist analgesic like Dilaudid, agonist/antagonist analgesics like pentazocine, nalbuphine, butorphanol, and buprenorphine, need to be used with warning.Assess the client for indications and s