Drug interactions
Chlorpheniramine + Daridorexant
Severity: Moderate
Chlorpheniramine and Daridorexant: 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, and combined use can intensify drowsiness and impair next-day psychomotor performance and driving. The risk is greater at higher doses and in older adults.
What this interaction means in plain words
Chlorpheniramine and Daridorexant 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; Daridorexant belongs to Central Nervous System.
Why it happens
Additive CNS depression from sedating antihistamine effect and orexin receptor antagonism.
What to do
Avoid combining if possible, or use the lowest effective doses and warn patients about daytime impairment and driving.
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 Daridorexant
Frequently asked questions
Can I take Chlorpheniramine with Daridorexant?
MediHelp rates the interaction as moderate. Chlorpheniramine and Daridorexant 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, and combined use can intensify drowsiness and impair next-day psychomotor performance and driving. The risk is greater at higher doses and in older adults.
How serious is the interaction between Chlorpheniramine and Daridorexant?
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 combining if possible, or use the lowest effective doses and warn patients about daytime impairment and driving.
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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