Drug interactions
Isoflurane + Isoproterenol
Severity: Major
Isoflurane and Isoproterenol: major interaction.
Last updated Sources: UK SmPC
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
Volatile anesthetics sensitize the myocardium to beta-agonists, and isoproterenol is a strong chronotropic agent that can cause tachyarrhythmias. Ventricular arrhythmias and blood pressure swings may occur.
What this interaction means in plain words
Isoflurane and Isoproterenol 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.
Isoflurane belongs to Central Nervous System; Isoproterenol belongs to Respiratory.
Why it happens
Myocardial sensitization by the volatile anesthetic to catecholamine-induced arrhythmia, plus additive beta-adrenergic effects.
What to do
Titrate isoproterenol to the lowest effective dose with continuous ECG and blood pressure monitoring. Have antiarrhythmic therapy available.
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 Isoflurane
Other interactions of Isoproterenol
Frequently asked questions
Can I take Isoflurane with Isoproterenol?
MediHelp rates the interaction as major. Isoflurane and Isoproterenol 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. Volatile anesthetics sensitize the myocardium to beta-agonists, and isoproterenol is a strong chronotropic agent that can cause tachyarrhythmias. Ventricular arrhythmias and blood pressure swings may occur.
How serious is the interaction between Isoflurane and Isoproterenol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Titrate isoproterenol to the lowest effective dose with continuous ECG and blood pressure monitoring. Have antiarrhythmic therapy available.
What other medicines interact with Isoflurane?
MediHelp also lists interactions of Isoflurane with, for example, Adrenaline-articaine, Amisulpride, Arsenic trioxide. The full list is on the Isoflurane page.
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