Drug interactions
Salbutamol + Saquinavir
Severity: Moderate
Salbutamol and Saquinavir: 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
Ritonavir-boosted saquinavir prolongs the QT interval, and salbutamol can cause hypokalemia and tachycardia, so together they may add to the risk of arrhythmia. The effect is more relevant with high-dose or nebulized salbutamol.
What this interaction means in plain words
Salbutamol and Saquinavir 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 pharmacodynamic effects on QT prolongation and beta-agonist-induced hypokalemia.
What to do
Use the lowest effective salbutamol dose and monitor ECG and serum potassium in patients with cardiac risk factors. Correct hypokalemia and avoid other QT-prolonging drugs.
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 Salbutamol with Saquinavir?
MediHelp rates the interaction as moderate. Salbutamol and Saquinavir 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. Ritonavir-boosted saquinavir prolongs the QT interval, and salbutamol can cause hypokalemia and tachycardia, so together they may add to the risk of arrhythmia. The effect is more relevant with high-dose or nebulized salbutamol.
How serious is the interaction between Salbutamol and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective salbutamol dose and monitor ECG and serum potassium in patients with cardiac risk factors. Correct hypokalemia and avoid other QT-prolonging drugs.
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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