Drug interactions
Diazepam intranasal + Pentazocine
Severity: Major
Diazepam intranasal and Pentazocine: major interaction.
Last updated Sources: US FDA label
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
Opioids and benzodiazepines together can cause profound sedation, respiratory depression, coma and death. This is a boxed-warning class interaction, and intranasal diazepam is also associated with CNS depression.
What this interaction means in plain words
Diazepam intranasal and Pentazocine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive CNS and respiratory depression through opioid and GABA-A receptor effects.
What to do
Reserve combined use for patients with no alternatives, using the lowest doses and shortest duration. Monitor respiratory rate and sedation, and counsel on avoiding alcohol and other depressants.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Pentazocine
- Calcium / magnesium / potassium / sodium oxybates + Pentazocine Contraindicated
- Olanzapine / samidorphan + Pentazocine Contraindicated
- Pentazocine + Phenelzine Contraindicated
- Pentazocine + Tranylcypromine Contraindicated
- Alfentanil + Pentazocine Major
- Alprazolam + Pentazocine Major
Frequently asked questions
Can I take Diazepam intranasal with Pentazocine?
MediHelp rates the interaction as major. Diazepam intranasal and Pentazocine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Opioids and benzodiazepines together can cause profound sedation, respiratory depression, coma and death. This is a boxed-warning class interaction, and intranasal diazepam is also associated with CNS depression.
How serious is the interaction between Diazepam intranasal and Pentazocine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Reserve combined use for patients with no alternatives, using the lowest doses and shortest duration. Monitor respiratory rate and sedation, and counsel on avoiding alcohol and other depressants.
What other medicines interact with Pentazocine?
MediHelp also lists interactions of Pentazocine with, for example, Calcium / magnesium / potassium / sodium oxybates, Olanzapine / samidorphan, Phenelzine. The full list is on the Pentazocine page.
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