Nalbuphine and Naltrexone interaction
Nalbuphine and Naltrexone: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Nalbuphine (Nalbuphine Hydrochloride) label · effective 2026-07-16
Management of respiratory depression may include close observation, supportive measures, and use of opioid overdose reversal agents (e.g., naloxone, nalmefene), depending on the patient's clinical status [see OVERDOSAGE ].
Naloxone may reverse these effects.
Maternal administration of naloxone during labor has normalized these effects in some cases.
Drug Interactions Benzodiazepines and other Central Nervous System (CNS) Depressants Although Nalbuphine Hydrochloride Injection possesses opioid antagonist activity, there is evidence that in nondependent patients it will not antagonize an opioid analgesic administered just before, concurrently, or just after an injection of Nalbuphine Hydrochloride Injection.
From the Naltrexone label · effective 2026-01-30
Naltrexone for extended-release injectable suspension is contraindicated in: Patients receiving opioid analgesics [see Warnings and Precautions ( 5.3 ) ] .
Patients with current physiologic opioid dependence [see Warnings and Precautions ( 5.3 ) ] .
Patients in acute opioid withdrawal [see Warnings and Precautions ( 5.3 ) ] .
Any individual who has failed the naloxone challenge test or has a positive urine screen for opioids [see Warnings and Precautions ( 5.3 ) ] .
Naltrexone for extended-release injectable suspension is contraindicated in: Patients receiving opioid analgesics (4) .
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.