Drug interactions
Dexchlorpheniramine + Topiramate
Severity: Moderate
Dexchlorpheniramine and Topiramate: 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
Dexchlorpheniramine is a sedating antihistamine that may compound the drowsiness and slowed thinking caused by topiramate. This can reduce alertness and psychomotor performance.
What this interaction means in plain words
Dexchlorpheniramine and Topiramate 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.
Dexchlorpheniramine belongs to Respiratory; Topiramate belongs to Central Nervous System.
Why it happens
Additive CNS depressant effects of a first-generation antihistamine and topiramate.
What to do
Warn patients about drowsiness and avoid driving until the response is known. Prefer a non-sedating antihistamine where possible.
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 Topiramate
Other interactions of Dexchlorpheniramine
- Alprazolam + Dexchlorpheniramine Moderate
- Amisulpride + Dexchlorpheniramine Moderate
- Amitriptyline + Dexchlorpheniramine Moderate
- Amobarbital + Dexchlorpheniramine Moderate
- Asenapine + Dexchlorpheniramine Moderate
- Azelastine-fluticasone + Dexchlorpheniramine Moderate
Frequently asked questions
Can I take Dexchlorpheniramine with Topiramate?
MediHelp rates the interaction as moderate. Dexchlorpheniramine and Topiramate 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. Dexchlorpheniramine is a sedating antihistamine that may compound the drowsiness and slowed thinking caused by topiramate. This can reduce alertness and psychomotor performance.
How serious is the interaction between Dexchlorpheniramine and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Warn patients about drowsiness and avoid driving until the response is known. Prefer a non-sedating antihistamine where possible.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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