Drug interactions
Chlorpheniramine + Lemborexant
Severity: Moderate
Chlorpheniramine and Lemborexant: 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
Both drugs cause sedation, so combined use may increase somnolence and next-day impairment of alertness and driving ability.
What this interaction means in plain words
Chlorpheniramine and Lemborexant 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.
Chlorpheniramine belongs to Respiratory; Lemborexant belongs to Central Nervous System.
Why it happens
Additive CNS depression from orexin receptor antagonism and histamine H1 blockade.
What to do
Avoid concurrent use where possible; otherwise reduce doses as needed and counsel patients about daytime impairment.
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 Chlorpheniramine
Other interactions of Lemborexant
Frequently asked questions
Can I take Chlorpheniramine with Lemborexant?
MediHelp rates the interaction as moderate. Chlorpheniramine and Lemborexant 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. Both drugs cause sedation, so combined use may increase somnolence and next-day impairment of alertness and driving ability.
How serious is the interaction between Chlorpheniramine and Lemborexant?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use where possible; otherwise reduce doses as needed and counsel patients about daytime impairment.
What other medicines interact with Chlorpheniramine?
MediHelp also lists interactions of Chlorpheniramine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Chlorpheniramine page.
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