Drug interactions
Dimenhydrinate + Pholcodine
Severity: Moderate
Dimenhydrinate and Pholcodine: 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
Pholcodine is an opioid antitussive with sedative properties, and with dimenhydrinate it may increase drowsiness and impair alertness. Respiratory depression is unlikely at usual doses but is possible with higher doses or in vulnerable patients.
What this interaction means in plain words
Dimenhydrinate and Pholcodine 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 opioid action and H1 antagonism.
What to do
Counsel on drowsiness and avoid driving until response is known. Monitor older or respiratory-compromised patients for oversedation.
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 Dimenhydrinate
Frequently asked questions
Can I take Dimenhydrinate with Pholcodine?
MediHelp rates the interaction as moderate. Dimenhydrinate and Pholcodine 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. Pholcodine is an opioid antitussive with sedative properties, and with dimenhydrinate it may increase drowsiness and impair alertness. Respiratory depression is unlikely at usual doses but is possible with higher doses or in vulnerable patients.
How serious is the interaction between Dimenhydrinate and Pholcodine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel on drowsiness and avoid driving until response is known. Monitor older or respiratory-compromised patients for oversedation.
What other medicines interact with Dimenhydrinate?
MediHelp also lists interactions of Dimenhydrinate with, for example, Belladonna and opium, Brexanolone, Calcium / magnesium / potassium / sodium oxybates. The full list is on the Dimenhydrinate page.
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