Drug interactions
Difelikefalin + Dimenhydrinate
Severity: Moderate
Difelikefalin and Dimenhydrinate: 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
Difelikefalin, a kappa-opioid agonist, can cause somnolence and dizziness. Adding a sedating antihistamine such as dimenhydrinate may intensify these effects.
What this interaction means in plain words
Difelikefalin and Dimenhydrinate 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.
Difelikefalin belongs to Dermatology; Dimenhydrinate belongs to Respiratory.
Why it happens
Additive CNS depression through kappa-opioid receptor agonism and central H1 antagonism.
What to do
Monitor for excessive drowsiness, dizziness and falls, especially in dialysis patients. Reduce or avoid the antihistamine if sedation develops.
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
Other interactions of Difelikefalin
- Acetazolamide + Difelikefalin Moderate
- Alprazolam + Difelikefalin Moderate
- Amantadine + Difelikefalin Moderate
- Amitriptyline + Difelikefalin Moderate
- Amobarbital + Difelikefalin Moderate
- Asenapine + Difelikefalin Moderate
Frequently asked questions
Can I take Difelikefalin with Dimenhydrinate?
MediHelp rates the interaction as moderate. Difelikefalin and Dimenhydrinate 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. Difelikefalin, a kappa-opioid agonist, can cause somnolence and dizziness. Adding a sedating antihistamine such as dimenhydrinate may intensify these effects.
How serious is the interaction between Difelikefalin and Dimenhydrinate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for excessive drowsiness, dizziness and falls, especially in dialysis patients. Reduce or avoid the antihistamine if sedation develops.
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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