Methamphetamine and Methylene blue interaction
Methamphetamine and Methylene blue: the Methamphetamine prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Methamphetamine (Methamphetamine Hydrochloride) label · effective 2025-11-07
Hypersensitivity reactions such as angioedema and anaphylactic reactions have been reported in patients treated with other amphetamine products [see Adverse Reactions ( 6 )]. taking monoamine oxidase inhibitors (MAOIs), or within 14 days following discontinuation of treatment with an MAOIs (including MAOIs such as linezolid or intravenous methylene blue), because…
Concomitant use of monoamine oxidase inhibitors (MAOIs), or use of an MAOI within the preceding 14 days.
Serotonin Syndrome: Increased risk when coadministered with serotonergic agents (e.g., SSRIs, SNRIs, triptans), but also during overdosage situations.
Concomitant use of methamphetamine with MAOI drugs is contraindicated [see Contraindications (4)].
Intervention: Concomitant use of methamphetamine hydrochloride tablets, USP with monoamine oxidase inhibitors (MAOIs) or within 14 days after discontinuing MAOI treatment is contraindicated [see Contraindications (4)].
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.