Drug interactions
Dextroamphetamine + Paroxetine
Severity: Major
Dextroamphetamine and Paroxetine: major interaction.
Last updated Sources: US FDA label
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
Paroxetine inhibits CYP2D6, which contributes to amphetamine metabolism, and both drugs increase serotonergic activity. Together they can raise amphetamine exposure and the risk of serotonin syndrome, with agitation, tremor, hyperthermia and tachycardia.
What this interaction means in plain words
Dextroamphetamine and Paroxetine 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.
Dextroamphetamine belongs to Central Nervous System; Paroxetine belongs to Central Nervous System.
Why it happens
CYP2D6 inhibition by paroxetine reduces amphetamine clearance, with additive serotonergic and sympathomimetic effects.
What to do
Start dextroamphetamine at a low dose and titrate carefully. Monitor for serotonin syndrome and cardiovascular effects, and stop the drugs if toxicity occurs.
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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References
Other interactions of Paroxetine
- Isocarboxazid + Paroxetine Contraindicated
- Methylene blue + Paroxetine Contraindicated
- Paroxetine + Phenelzine Contraindicated
- Paroxetine + Pimozide Contraindicated
- Paroxetine + Procarbazine Contraindicated
- Paroxetine + Selegiline Contraindicated
Other interactions of Dextroamphetamine
- Dextroamphetamine + Isocarboxazid Contraindicated
- Dextroamphetamine + Linezolid Contraindicated
- Dextroamphetamine + Methylene blue Contraindicated
- Dextroamphetamine + Phenelzine Contraindicated
- Dextroamphetamine + Rasagiline Contraindicated
- Dextroamphetamine + Safinamide Contraindicated
Frequently asked questions
Can I take Dextroamphetamine with Paroxetine?
MediHelp rates the interaction as major. Dextroamphetamine and Paroxetine 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. Paroxetine inhibits CYP2D6, which contributes to amphetamine metabolism, and both drugs increase serotonergic activity. Together they can raise amphetamine exposure and the risk of serotonin syndrome, with agitation, tremor, hyperthermia and tachycardia.
How serious is the interaction between Dextroamphetamine and Paroxetine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start dextroamphetamine at a low dose and titrate carefully. Monitor for serotonin syndrome and cardiovascular effects, and stop the drugs if toxicity occurs.
What other medicines interact with Paroxetine?
MediHelp also lists interactions of Paroxetine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Paroxetine page.
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