Drug interactions
Midazolam intranasal + Pentazocine
Severity: Major
Midazolam 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
Combining benzodiazepines with opioids can cause profound sedation, respiratory depression, coma and death. Intranasal midazolam given with pentazocine raises the risk of hypoventilation, airway obstruction and apnea.
What this interaction means in plain words
Midazolam 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 via GABA-A potentiation and opioid receptor activity.
What to do
Avoid the combination where possible; if used, give the lowest effective doses and monitor respiratory rate, oxygen saturation and sedation continuously. Ensure resuscitation equipment is available.
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 Midazolam intranasal with Pentazocine?
MediHelp rates the interaction as major. Midazolam 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. Combining benzodiazepines with opioids can cause profound sedation, respiratory depression, coma and death. Intranasal midazolam given with pentazocine raises the risk of hypoventilation, airway obstruction and apnea.
How serious is the interaction between Midazolam 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: Avoid the combination where possible; if used, give the lowest effective doses and monitor respiratory rate, oxygen saturation and sedation continuously. Ensure resuscitation equipment is available.
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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