Drug interactions
Procainamide + Salbutamol
Severity: Moderate
Procainamide 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
Procainamide prolongs the QT interval and can cause torsades de pointes. Salbutamol can add to this risk, particularly at high or nebulized doses, because it lowers serum potassium and increases heart rate.
What this interaction means in plain words
Procainamide 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.
Why it happens
Additive QT prolongation, with beta-2 agonist induced hypokalemia and tachycardia facilitating arrhythmia.
What to do
Monitor ECG and serum potassium and magnesium when high-dose or nebulized salbutamol is given to a patient on procainamide. Correct electrolyte abnormalities and use the lowest effective salbutamol dose.
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 Salbutamol
Frequently asked questions
Can I take Procainamide with Salbutamol?
MediHelp rates the interaction as moderate. Procainamide 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. Procainamide prolongs the QT interval and can cause torsades de pointes. Salbutamol can add to this risk, particularly at high or nebulized doses, because it lowers serum potassium and increases heart rate.
How serious is the interaction between Procainamide 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: Monitor ECG and serum potassium and magnesium when high-dose or nebulized salbutamol is given to a patient on procainamide. Correct electrolyte abnormalities and use the lowest effective salbutamol dose.
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.
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