Drug interactions
Dextroamphetamine transdermal + Perphenazine
Severity: Moderate
Dextroamphetamine transdermal and Perphenazine: 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
Amphetamines increase monoamine release and labeling warns about serotonin syndrome with serotonergic drugs. Perphenazine is not strongly serotonergic, and antipsychotics can also blunt amphetamine effects, so the interaction is poorly defined.
What this interaction means in plain words
Dextroamphetamine transdermal and Perphenazine 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.
Why it happens
Dopamine receptor blockade by perphenazine opposes amphetamine effects, and additive serotonergic effects are theoretical.
What to do
Monitor for reduced stimulant efficacy and for signs of serotonin toxicity such as agitation, tremor and hyperthermia. Adjust doses based on response.
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 Perphenazine
- Ibutilide + Perphenazine Contraindicated
- Perphenazine + Pimozide Contraindicated
- Perphenazine + Thioridazine Contraindicated
- Adagrasib + Perphenazine Major
- Alfentanil + Perphenazine Major
- Amiodarone + Perphenazine Major
Frequently asked questions
Can I take Dextroamphetamine transdermal with Perphenazine?
MediHelp rates the interaction as moderate. Dextroamphetamine transdermal and Perphenazine 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. Amphetamines increase monoamine release and labeling warns about serotonin syndrome with serotonergic drugs. Perphenazine is not strongly serotonergic, and antipsychotics can also blunt amphetamine effects, so the interaction is poorly defined.
How serious is the interaction between Dextroamphetamine transdermal and Perphenazine?
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 for reduced stimulant efficacy and for signs of serotonin toxicity such as agitation, tremor and hyperthermia. Adjust doses based on response.
What other medicines interact with Perphenazine?
MediHelp also lists interactions of Perphenazine with, for example, Ibutilide, Pimozide, Thioridazine. The full list is on the Perphenazine page.
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