Amphetamine and dextroamphetamine and Isoniazid interaction
Amphetamine and dextroamphetamine and Isoniazid: the Amphetamine and dextroamphetamine prescribing label flag 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 Amphetamine and dextroamphetamine (Adderall XR) label · effective 2026-04-30
Hypersensitivity reactions such as angioedema and anaphylactic reactions have been reported in patients treated with other amphetamine products [see Adverse Reactions ( 6.2 )] . taking monoamine oxidase inhibitors (MAOIs), or within 14 days of stopping MAOIs (including MAOIs such as linezolid or intravenous methylene blue), because of an increased risk of hypertensive…
During or within 14 days following the administration of monoamine oxidase inhibitors (MAOI).
Concomitant use of ADDERALL XR with MAOI drugs is contraindicated [see Contraindications ( 4 )] .
Intervention Do not administer ADDERALL XR concomitantly or within 14 days after discontinuing MAOI [see Contraindications ( 4 )] .
…syndrome, a potentially life-threatening reaction, may occur when amphetamines are used in combination with other drugs that affect the serotonergic neurotransmitter systems such as MAOIs, selective serotonin reuptake inhibitors (SSRIs), serotonin norepinephrine reuptake inhibitors (SNRIs), triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan,…
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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.