Drug interactions
Marijuana + Pentazocine
Severity: Moderate
Marijuana and Pentazocine: moderate 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
Cannabis causes sedation, dizziness and impaired cognition, and combined use with pentazocine may increase these effects. Pentazocine itself can cause dysphoria and psychotomimetic reactions, which may be worsened.
What this interaction means in plain words
Marijuana and Pentazocine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive CNS depressant and psychoactive effects.
What to do
Advise patients to avoid cannabis while taking pentazocine and to avoid driving. Monitor for excessive sedation, confusion and dysphoria.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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
Frequently asked questions
Can I take Marijuana with Pentazocine?
MediHelp rates the interaction as moderate. Marijuana and Pentazocine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Cannabis causes sedation, dizziness and impaired cognition, and combined use with pentazocine may increase these effects. Pentazocine itself can cause dysphoria and psychotomimetic reactions, which may be worsened.
How serious is the interaction between Marijuana and Pentazocine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients to avoid cannabis while taking pentazocine and to avoid driving. Monitor for excessive sedation, confusion and dysphoria.
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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