Drug interactions
Ephedrine + Pimozide
Severity: Moderate
Ephedrine and Pimozide: 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
Ephedrine is a sympathomimetic stimulant that may counteract pimozide's sedation, while pimozide's alpha-blocking effect may blunt the pressor response of ephedrine. Both agents can affect heart rate and rhythm, and ephedrine may add to arrhythmia risk.
What this interaction means in plain words
Ephedrine and Pimozide 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.
Ephedrine belongs to Cardiovascular; Pimozide belongs to Central Nervous System.
Why it happens
Opposing pharmacodynamic effects on adrenergic and dopaminergic pathways, with possible additive cardiac effects.
What to do
Monitor blood pressure, heart rate and ECG when the drugs are used together, and adjust the ephedrine dose to 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 Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Other interactions of Ephedrine
- Ephedrine + Isocarboxazid Contraindicated
- Ephedrine + Phenelzine Contraindicated
- Ephedrine + Procarbazine Contraindicated
- Ephedrine + Rasagiline Contraindicated
- Ephedrine + Selegiline Contraindicated
- Ephedrine + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Ephedrine with Pimozide?
MediHelp rates the interaction as moderate. Ephedrine and Pimozide 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. Ephedrine is a sympathomimetic stimulant that may counteract pimozide's sedation, while pimozide's alpha-blocking effect may blunt the pressor response of ephedrine. Both agents can affect heart rate and rhythm, and ephedrine may add to arrhythmia risk.
How serious is the interaction between Ephedrine and Pimozide?
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 blood pressure, heart rate and ECG when the drugs are used together, and adjust the ephedrine dose to response.
What other medicines interact with Pimozide?
MediHelp also lists interactions of Pimozide with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pimozide page.
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