Drug interactions
Lemborexant + Valproic acid
Severity: Minor
Lemborexant 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
Valproate may modestly increase lemborexant exposure if it inhibits CYP3A4, which could increase next-day somnolence. The magnitude is expected to be small.
What this interaction means in plain words
Lemborexant 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.
Lemborexant belongs to Central Nervous System; Valproic acid belongs to Central Nervous System.
Why it happens
Possible weak CYP3A4 inhibition reducing lemborexant metabolism.
What to do
Watch for excessive daytime drowsiness and psychomotor impairment, and reduce the lemborexant dose if these occur.
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 Lemborexant
Frequently asked questions
Can I take Lemborexant with Valproic acid?
MediHelp rates the interaction as minor. Lemborexant 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. Valproate may modestly increase lemborexant exposure if it inhibits CYP3A4, which could increase next-day somnolence. The magnitude is expected to be small.
How serious is the interaction between Lemborexant 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: Watch for excessive daytime drowsiness and psychomotor impairment, and reduce the lemborexant dose if these occur.
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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