Drug interactions
Procainamide + Sevoflurane
Severity: Major
Procainamide and Sevoflurane: 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
Procainamide is a class IA antiarrhythmic that lengthens the QT interval and can cause torsades de pointes. Sevoflurane adds to QT prolongation and hypotension, and may also potentiate conduction slowing.
What this interaction means in plain words
Procainamide and Sevoflurane 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.
Why it happens
Additive prolongation of repolarization and conduction slowing.
What to do
Obtain a baseline ECG and correct electrolytes before anesthesia. Monitor the ECG and blood pressure continuously, and have antiarrhythmic and resuscitation support ready.
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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Other interactions of Sevoflurane
Frequently asked questions
Can I take Procainamide with Sevoflurane?
MediHelp rates the interaction as major. Procainamide and Sevoflurane 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. Procainamide is a class IA antiarrhythmic that lengthens the QT interval and can cause torsades de pointes. Sevoflurane adds to QT prolongation and hypotension, and may also potentiate conduction slowing.
How serious is the interaction between Procainamide and Sevoflurane?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and correct electrolytes before anesthesia. Monitor the ECG and blood pressure continuously, and have antiarrhythmic and resuscitation support ready.
What other medicines interact with Sevoflurane?
MediHelp also lists interactions of Sevoflurane with, for example, Amiodarone, Amisulpride, Arsenic trioxide. The full list is on the Sevoflurane page.
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