Drug interactions
Haloperidol + Terbutaline
Severity: Moderate
Haloperidol and Terbutaline: 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
Haloperidol can prolong the QT interval, and terbutaline can cause tachycardia and hypokalemia, which together may increase the risk of ventricular arrhythmias. The risk is greatest with high doses or cardiac risk factors.
What this interaction means in plain words
Haloperidol and Terbutaline 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.
Haloperidol belongs to Central Nervous System; Terbutaline belongs to Respiratory.
Why it happens
Additive QT-prolonging potential from haloperidol and beta-agonist-induced hypokalemia and tachycardia.
What to do
Monitor ECG and serum potassium, particularly with intravenous haloperidol or other QT-prolonging drugs. Correct electrolyte disturbances.
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 Terbutaline
Other interactions of Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Haloperidol with Terbutaline?
MediHelp rates the interaction as moderate. Haloperidol and Terbutaline 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. Haloperidol can prolong the QT interval, and terbutaline can cause tachycardia and hypokalemia, which together may increase the risk of ventricular arrhythmias. The risk is greatest with high doses or cardiac risk factors.
How serious is the interaction between Haloperidol and Terbutaline?
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 ECG and serum potassium, particularly with intravenous haloperidol or other QT-prolonging drugs. Correct electrolyte disturbances.
What other medicines interact with Terbutaline?
MediHelp also lists interactions of Terbutaline with, for example, Carvedilol, Droperidol, Fexinidazole. The full list is on the Terbutaline page.
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