Drug interactions
Dextroamphetamine + Methylene blue
Severity: Contraindicated
Dextroamphetamine and Methylene blue: contraindicated 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 inhibits monoamine oxidase A and, with serotonergic or sympathomimetic drugs, can cause serotonin syndrome. Amphetamine adds serotonin and norepinephrine release, and hypertensive reactions are also possible.
What this interaction means in plain words
Dextroamphetamine and Methylene blue are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Why it happens
MAO-A inhibition by methylene blue combined with amphetamine-induced monoamine release.
What to do
Avoid the combination. If urgent methylene blue treatment is needed, stop the amphetamine and monitor for serotonin toxicity for at least 24 hours after the last methylene blue dose, or until two weeks have passed if the methylene blue is not given.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Dextroamphetamine
- Dextroamphetamine + Isocarboxazid Contraindicated
- Dextroamphetamine + Linezolid Contraindicated
- Dextroamphetamine + Phenelzine Contraindicated
- Dextroamphetamine + Rasagiline Contraindicated
- Dextroamphetamine + Safinamide Contraindicated
- Dextroamphetamine + Selegiline Contraindicated
Frequently asked questions
Can I take Dextroamphetamine with Methylene blue?
MediHelp rates the interaction as contraindicated. Dextroamphetamine and Methylene blue are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Methylene blue inhibits monoamine oxidase A and, with serotonergic or sympathomimetic drugs, can cause serotonin syndrome. Amphetamine adds serotonin and norepinephrine release, and hypertensive reactions are also possible.
How serious is the interaction between Dextroamphetamine and Methylene blue?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination. If urgent methylene blue treatment is needed, stop the amphetamine and monitor for serotonin toxicity for at least 24 hours after the last methylene blue dose, or until two weeks have passed if the methylene blue is not given.
What other medicines interact with Dextroamphetamine?
MediHelp also lists interactions of Dextroamphetamine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Dextroamphetamine page.
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