Drug interactions
Methylenedioxymethamphetamine + Olanzapine
Severity: Moderate
Methylenedioxymethamphetamine and Olanzapine: 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 recreational stimulant with serotonergic effects, and combining it with olanzapine may raise the risk of hyperthermia, tachycardia and blood pressure swings. Antipsychotic dopamine blockade could also increase neuroleptic malignant syndrome risk. The combination is unpredictable and the data are limited.
What this interaction means in plain words
Methylenedioxymethamphetamine and Olanzapine 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 dopaminergic and serotonergic actions with possible additive effects on thermoregulation and cardiovascular function; mechanism not fully characterised.
What to do
Counsel patients to avoid MDMA. If exposure occurs, monitor temperature, heart rate, blood pressure and mental status, and treat hyperthermia promptly.
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 Olanzapine
Frequently asked questions
Can I take Methylenedioxymethamphetamine with Olanzapine?
MediHelp rates the interaction as moderate. Methylenedioxymethamphetamine and Olanzapine 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 recreational stimulant with serotonergic effects, and combining it with olanzapine may raise the risk of hyperthermia, tachycardia and blood pressure swings. Antipsychotic dopamine blockade could also increase neuroleptic malignant syndrome risk. The combination is unpredictable and the data are limited.
How serious is the interaction between Methylenedioxymethamphetamine and Olanzapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel patients to avoid MDMA. If exposure occurs, monitor temperature, heart rate, blood pressure and mental status, and treat hyperthermia promptly.
What other medicines interact with Olanzapine?
MediHelp also lists interactions of Olanzapine with, for example, Amisulpride, Amoxapine, Apomorphine. The full list is on the Olanzapine page.
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