Drug interactions
Doxylamine + Methylene blue
Severity: Minor
Doxylamine and Methylene blue: minor 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
Methylene blue is a potent MAO-A inhibitor and can cause serotonin syndrome with serotonergic drugs. Doxylamine has little serotonergic activity, so the risk is much lower than with antidepressants.
What this interaction means in plain words
Doxylamine and Methylene blue have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Methylene blue MAO-A inhibition; doxylamine has only weak, if any, serotonergic effects, so the interaction is largely theoretical.
What to do
No specific action is usually needed; be aware of signs of serotonin toxicity and review other serotonergic drugs the patient is taking.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Doxylamine
Frequently asked questions
Can I take Doxylamine with Methylene blue?
MediHelp rates the interaction as minor. Doxylamine and Methylene blue have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Methylene blue is a potent MAO-A inhibitor and can cause serotonin syndrome with serotonergic drugs. Doxylamine has little serotonergic activity, so the risk is much lower than with antidepressants.
How serious is the interaction between Doxylamine and Methylene blue?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific action is usually needed; be aware of signs of serotonin toxicity and review other serotonergic drugs the patient is taking.
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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