Drug interactions
Dextroamphetamine + Loxapine
Severity: Moderate
Dextroamphetamine and Loxapine: 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
Loxapine blocks dopamine receptors and can counteract the effects of amphetamine, while stimulants may aggravate psychosis. Loxapine also lowers the seizure threshold and may add to cardiac effects.
What this interaction means in plain words
Dextroamphetamine and Loxapine 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.
Dextroamphetamine belongs to Central Nervous System; Loxapine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism at dopamine receptors, with additive effects on seizure threshold.
What to do
Monitor psychotic symptoms, heart rate and seizure risk, and reassess the stimulant if symptoms worsen.
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 Dextroamphetamine
- Dextroamphetamine + Isocarboxazid Contraindicated
- Dextroamphetamine + Linezolid Contraindicated
- Dextroamphetamine + Methylene blue Contraindicated
- Dextroamphetamine + Phenelzine Contraindicated
- Dextroamphetamine + Rasagiline Contraindicated
- Dextroamphetamine + Safinamide Contraindicated
Other interactions of Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Frequently asked questions
Can I take Dextroamphetamine with Loxapine?
MediHelp rates the interaction as moderate. Dextroamphetamine and Loxapine 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. Loxapine blocks dopamine receptors and can counteract the effects of amphetamine, while stimulants may aggravate psychosis. Loxapine also lowers the seizure threshold and may add to cardiac effects.
How serious is the interaction between Dextroamphetamine and Loxapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor psychotic symptoms, heart rate and seizure risk, and reassess the stimulant if symptoms worsen.
What other medicines interact with Dextroamphetamine?
MediHelp also lists interactions of Dextroamphetamine with, for example, Isocarboxazid, Linezolid, Methylene blue. The full list is on the Dextroamphetamine page.
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