Drug interactions
Doxylamine + Methylenedioxymethamphetamine
Severity: Moderate
Doxylamine and Methylenedioxymethamphetamine: 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
MDMA is a stimulant and may partly offset doxylamine sedation, while doxylamine anticholinergic effects may add to MDMA-related tachycardia, hyperthermia and agitation. The net effect is unpredictable, and masking of sedation may lead to unsafe activity.
What this interaction means in plain words
Doxylamine and Methylenedioxymethamphetamine 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
Opposing pharmacodynamic effects, with additive anticholinergic contribution to sympathomimetic hyperthermia and tachycardia; not fully characterised.
What to do
Advise avoiding the combination, as MDMA is an illicit drug. If exposure occurs, monitor temperature, heart rate and mental status.
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 Methylenedioxymethamphetamine?
MediHelp rates the interaction as moderate. Doxylamine and Methylenedioxymethamphetamine 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. MDMA is a stimulant and may partly offset doxylamine sedation, while doxylamine anticholinergic effects may add to MDMA-related tachycardia, hyperthermia and agitation. The net effect is unpredictable, and masking of sedation may lead to unsafe activity.
How serious is the interaction between Doxylamine and Methylenedioxymethamphetamine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise avoiding the combination, as MDMA is an illicit drug. If exposure occurs, monitor temperature, heart rate and mental status.
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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