Drug interactions
Chlorpheniramine + Estazolam
Severity: Moderate
Chlorpheniramine and Estazolam: 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
A sedating antihistamine taken with a hypnotic benzodiazepine increases next-day drowsiness, impaired coordination and the risk of falls. Respiratory depression is possible, especially in older patients or with other depressants.
What this interaction means in plain words
Chlorpheniramine and Estazolam 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 depression from benzodiazepine GABA-A potentiation and sedating H1 blockade.
What to do
Avoid combining where possible and counsel against alcohol and driving. Use a non-sedating antihistamine and the lowest estazolam dose if both are required.
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
Frequently asked questions
Can I take Chlorpheniramine with Estazolam?
MediHelp rates the interaction as moderate. Chlorpheniramine and Estazolam 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. A sedating antihistamine taken with a hypnotic benzodiazepine increases next-day drowsiness, impaired coordination and the risk of falls. Respiratory depression is possible, especially in older patients or with other depressants.
How serious is the interaction between Chlorpheniramine and Estazolam?
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 where possible and counsel against alcohol and driving. Use a non-sedating antihistamine and the lowest estazolam dose if both are required.
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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