Drug interactions
Chlorpheniramine + Gabapentin enacarbil
Severity: Moderate
Chlorpheniramine and Gabapentin enacarbil: 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
Combining gabapentinoids with sedating antihistamines increases drowsiness and dizziness and may add to respiratory depression risk, particularly in older or frail patients and those with lung disease.
What this interaction means in plain words
Chlorpheniramine and Gabapentin enacarbil 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; Gabapentin enacarbil belongs to Central Nervous System.
Why it happens
Additive CNS depression through different central mechanisms.
What to do
Use the lowest effective doses and monitor for sedation and respiratory depression, especially in at-risk patients.
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 Gabapentin enacarbil
Frequently asked questions
Can I take Chlorpheniramine with Gabapentin enacarbil?
MediHelp rates the interaction as moderate. Chlorpheniramine and Gabapentin enacarbil 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. Combining gabapentinoids with sedating antihistamines increases drowsiness and dizziness and may add to respiratory depression risk, particularly in older or frail patients and those with lung disease.
How serious is the interaction between Chlorpheniramine and Gabapentin enacarbil?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and monitor for sedation and respiratory depression, especially in at-risk patients.
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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