Drug interactions
Fluphenazine + Methylenedioxymethamphetamine
Severity: Major
Fluphenazine and Methylenedioxymethamphetamine: major 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 with serotonergic and sympathomimetic effects, which can cause tachycardia, hypertension, hyperthermia and arrhythmias. Fluphenazine can prolong the QT interval and block dopamine, so the combination may increase cardiac risk and complicate temperature regulation.
What this interaction means in plain words
Fluphenazine and Methylenedioxymethamphetamine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Opposing and additive pharmacodynamic effects, with sympathomimetic and serotonergic stimulation combined with antipsychotic QT prolongation and dopamine blockade.
What to do
Advise the patient to avoid MDMA. If exposure occurs, monitor ECG, temperature and vital signs and treat hyperthermia or arrhythmias promptly.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Methylenedioxymethamphetamine?
MediHelp rates the interaction as major. Fluphenazine and Methylenedioxymethamphetamine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. MDMA is a stimulant with serotonergic and sympathomimetic effects, which can cause tachycardia, hypertension, hyperthermia and arrhythmias. Fluphenazine can prolong the QT interval and block dopamine, so the combination may increase cardiac risk and complicate temperature regulation.
How serious is the interaction between Fluphenazine and Methylenedioxymethamphetamine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise the patient to avoid MDMA. If exposure occurs, monitor ECG, temperature and vital signs and treat hyperthermia or arrhythmias promptly.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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