Drug interactions
Dronabinol + Valproic acid
Severity: Minor
Dronabinol and Valproic acid: 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
Dronabinol is highly protein bound and could theoretically displace valproic acid from albumin, raising the free fraction. This has not been shown to matter clinically. Both drugs can cause sedation, so additive CNS effects are also possible.
What this interaction means in plain words
Dronabinol and Valproic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Dronabinol belongs to Central Nervous System; Valproic acid belongs to Central Nervous System.
Why it happens
Theoretical competition for plasma protein binding sites, plus additive CNS depression.
What to do
Monitor for sedation and seizure control when dronabinol is started or its dose is increased. Check free valproate concentrations if toxicity 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 Valproic acid
- Ertapenem + Valproic acid Contraindicated
- Imipenem / cilastatin / relebactam + Valproic acid Contraindicated
- Imipenem / cilastatin + Valproic acid Contraindicated
- Meropenem / vaborbactam + Valproic acid Contraindicated
- Meropenem + Valproic acid Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Valproic acid Major
Other interactions of Dronabinol
- Cefotetan + Dronabinol Contraindicated
- Disulfiram + Dronabinol Contraindicated
- Dronabinol + Midazolam intranasal Major
- Dronabinol + Zuranolone Major
- Amobarbital + Dronabinol Moderate
- Apalutamide + Dronabinol Moderate
Frequently asked questions
Can I take Dronabinol with Valproic acid?
MediHelp rates the interaction as minor. Dronabinol and Valproic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Dronabinol is highly protein bound and could theoretically displace valproic acid from albumin, raising the free fraction. This has not been shown to matter clinically. Both drugs can cause sedation, so additive CNS effects are also possible.
How serious is the interaction between Dronabinol and Valproic acid?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for sedation and seizure control when dronabinol is started or its dose is increased. Check free valproate concentrations if toxicity is suspected.
What other medicines interact with Valproic acid?
MediHelp also lists interactions of Valproic acid with, for example, Ertapenem, Imipenem / cilastatin / relebactam, Imipenem / cilastatin. The full list is on the Valproic acid page.
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