Combined Agonist/Antagonist and Partial Agonist Opioid Analgesics The concomitant usage of opioids with other opioid analgesics, like butorphanol, nalbuphine, pentazocine, may well reduce the analgesic impact of oxycodone and acetaminophen tablets and/or precipitate withdrawal symptoms. Suggest patient to avoid concomitant use of those drugs.Oxycod