Drug interactions
Doxylamine + Moxonidine
Severity: Moderate
Doxylamine and Moxonidine: 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
Moxonidine is a centrally acting antihypertensive that can cause somnolence and dry mouth. Doxylamine may add to drowsiness and anticholinergic effects, and may increase dizziness.
What this interaction means in plain words
Doxylamine and Moxonidine 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 central imidazoline and alpha-2 agonism with H1 antagonism.
What to do
Monitor for sedation and orthostatic symptoms, especially at initiation. Consider a non-sedating antihistamine if an antihistamine is needed.
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 Doxylamine
Frequently asked questions
Can I take Doxylamine with Moxonidine?
MediHelp rates the interaction as moderate. Doxylamine and Moxonidine 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. Moxonidine is a centrally acting antihypertensive that can cause somnolence and dry mouth. Doxylamine may add to drowsiness and anticholinergic effects, and may increase dizziness.
How serious is the interaction between Doxylamine and Moxonidine?
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 sedation and orthostatic symptoms, especially at initiation. Consider a non-sedating antihistamine if an antihistamine is needed.
What other medicines interact with Doxylamine?
MediHelp also lists interactions of Doxylamine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Doxylamine page.
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