Drug interactions
Isoflurane + Salbutamol
Severity: Moderate
Isoflurane and Salbutamol: 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
Volatile anaesthetics such as isoflurane can prolong the QT interval and sensitise the myocardium to catecholamines. Systemic beta-agonist exposure from salbutamol may add to arrhythmia risk during anaesthesia, particularly with hypokalaemia.
What this interaction means in plain words
Isoflurane and Salbutamol 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.
Isoflurane belongs to Central Nervous System; Salbutamol belongs to Respiratory.
Why it happens
Additive QT prolongation and myocardial catecholamine sensitisation, with beta-agonist-induced hypokalaemia.
What to do
Check serum potassium before anaesthesia in patients using high-dose salbutamol and monitor ECG intraoperatively. Correct hypokalaemia and avoid giving additional sympathomimetics unless needed.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Isoflurane and Salbutamol, 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 Salbutamol
Other interactions of Isoflurane
Frequently asked questions
Can I take Isoflurane with Salbutamol?
MediHelp rates the interaction as moderate. Isoflurane and Salbutamol 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. Volatile anaesthetics such as isoflurane can prolong the QT interval and sensitise the myocardium to catecholamines. Systemic beta-agonist exposure from salbutamol may add to arrhythmia risk during anaesthesia, particularly with hypokalaemia.
How serious is the interaction between Isoflurane and Salbutamol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium before anaesthesia in patients using high-dose salbutamol and monitor ECG intraoperatively. Correct hypokalaemia and avoid giving additional sympathomimetics unless needed.
What other medicines interact with Salbutamol?
MediHelp also lists interactions of Salbutamol with, for example, Arsenic trioxide, Carvedilol, Droperidol. The full list is on the Salbutamol 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.
