Drug interactions
Doxylamine + Olopatadine intranasal
Severity: Moderate
Doxylamine and Olopatadine intranasal: 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
Intranasal olopatadine can cause somnolence and doxylamine is strongly sedating. Together they may increase drowsiness and impair psychomotor performance.
What this interaction means in plain words
Doxylamine and Olopatadine intranasal 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 sedation from H1 antihistamine effects.
What to do
Avoid concurrent use of two antihistamines where possible; counsel patients about drowsiness and avoid driving.
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 Olopatadine intranasal?
MediHelp rates the interaction as moderate. Doxylamine and Olopatadine intranasal 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. Intranasal olopatadine can cause somnolence and doxylamine is strongly sedating. Together they may increase drowsiness and impair psychomotor performance.
How serious is the interaction between Doxylamine and Olopatadine intranasal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use of two antihistamines where possible; counsel patients about drowsiness and avoid driving.
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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