Drug interactions
Dobutamine + Pimozide
Severity: Major
Dobutamine and Pimozide: major 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
Pimozide markedly prolongs the QT interval and carries a risk of torsades de pointes, while dobutamine raises heart rate, can provoke ventricular ectopy and may lower potassium. Together they may increase the likelihood of serious ventricular arrhythmias.
What this interaction means in plain words
Dobutamine and Pimozide 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.
Dobutamine belongs to Cardiovascular; Pimozide belongs to Central Nervous System.
Why it happens
Additive proarrhythmic effects: pimozide QT prolongation with catecholamine-induced arrhythmogenesis and possible hypokalemia.
What to do
Use continuous ECG monitoring, check and correct potassium and magnesium, and consider an alternative to dobutamine if the QTc is prolonged.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dobutamine and Pimozide, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Dobutamine
Other interactions of Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Dobutamine with Pimozide?
MediHelp rates the interaction as major. Dobutamine and Pimozide 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. Pimozide markedly prolongs the QT interval and carries a risk of torsades de pointes, while dobutamine raises heart rate, can provoke ventricular ectopy and may lower potassium. Together they may increase the likelihood of serious ventricular arrhythmias.
How serious is the interaction between Dobutamine and Pimozide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use continuous ECG monitoring, check and correct potassium and magnesium, and consider an alternative to dobutamine if the QTc is prolonged.
What other medicines interact with Dobutamine?
MediHelp also lists interactions of Dobutamine with, for example, Budesonide-formoterol, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Dobutamine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
