Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics The concomitant usage of opioids with other opioid analgesics, for instance butorphanol, nalbuphine, pentazocine, may lessen the analgesic influence of oxycodone and acetaminophen tablets and/or precipitate withdrawal symptoms. Advise patient to avoid concomitant use of such drugs.The o