Drug interactions
Nalbuphine + Phentermine
Severity: Minor
Nalbuphine and Phentermine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Phentermine is a sympathomimetic stimulant that may partly offset nalbuphine drowsiness, but it does not reduce opioid respiratory depression. No clinically important interaction is well established.
What this interaction means in plain words
Nalbuphine and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Nalbuphine belongs to Musculoskeletal; Phentermine belongs to Central Nervous System.
Why it happens
Opposing pharmacodynamic effects on alertness; no established harmful mechanism.
What to do
No specific adjustment is needed; do not rely on phentermine to counter sedation and monitor respiration as usual.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Nalbuphine
- Alvimopan + Nalbuphine Contraindicated
- Nalbuphine + Olanzapine / samidorphan Contraindicated
- Alprazolam + Nalbuphine Major
- Amobarbital + Nalbuphine Major
- Benzhydrocodone / acetaminophen + Nalbuphine Major
- Brexanolone + Nalbuphine Major
Other interactions of Phentermine
- Isocarboxazid + Phentermine Contraindicated
- Linezolid + Phentermine Contraindicated
- Phenelzine + Phentermine Contraindicated
- Phentermine + Procarbazine Contraindicated
- Phentermine + Rasagiline Contraindicated
- Phentermine + Selegiline Contraindicated
Frequently asked questions
Can I take Nalbuphine with Phentermine?
MediHelp rates the interaction as minor. Nalbuphine and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phentermine is a sympathomimetic stimulant that may partly offset nalbuphine drowsiness, but it does not reduce opioid respiratory depression. No clinically important interaction is well established.
How serious is the interaction between Nalbuphine and Phentermine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific adjustment is needed; do not rely on phentermine to counter sedation and monitor respiration as usual.
What other medicines interact with Nalbuphine?
MediHelp also lists interactions of Nalbuphine with, for example, Alvimopan, Olanzapine / samidorphan, Alprazolam. The full list is on the Nalbuphine page.
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