Drug interactions
Pentazocine + Rizatriptan
Severity: Minor
Pentazocine and Rizatriptan: 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
Pentazocine has weak serotonergic activity, so with a triptan there is a theoretical risk of serotonin syndrome. Reports with this specific pair are lacking and the risk is considered low.
What this interaction means in plain words
Pentazocine and Rizatriptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Pentazocine belongs to Musculoskeletal; Rizatriptan belongs to Central Nervous System.
Why it happens
Possible additive serotonergic effects; mechanism not firmly established.
What to do
No routine change is needed. Counsel the patient to report agitation, tremor, sweating, diarrhea or fever, and stop both drugs if serotonin syndrome is suspected.
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 Pentazocine
- Calcium / magnesium / potassium / sodium oxybates + Pentazocine Contraindicated
- Olanzapine / samidorphan + Pentazocine Contraindicated
- Pentazocine + Phenelzine Contraindicated
- Pentazocine + Tranylcypromine Contraindicated
- Alfentanil + Pentazocine Major
- Alprazolam + Pentazocine Major
Other interactions of Rizatriptan
- Almotriptan + Rizatriptan Contraindicated
- Dihydroergotamine intranasal + Rizatriptan Contraindicated
- Dihydroergotamine + Rizatriptan Contraindicated
- Eletriptan + Rizatriptan Contraindicated
- Ergoloid mesylates + Rizatriptan Contraindicated
- Ergotamine + Rizatriptan Contraindicated
Frequently asked questions
Can I take Pentazocine with Rizatriptan?
MediHelp rates the interaction as minor. Pentazocine and Rizatriptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Pentazocine has weak serotonergic activity, so with a triptan there is a theoretical risk of serotonin syndrome. Reports with this specific pair are lacking and the risk is considered low.
How serious is the interaction between Pentazocine and Rizatriptan?
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 routine change is needed. Counsel the patient to report agitation, tremor, sweating, diarrhea or fever, and stop both drugs if serotonin syndrome is suspected.
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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