Drug interactions
Chlorthalidone + Salbutamol
Severity: Moderate
Chlorthalidone 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
Both drugs can lower serum potassium, and together they may cause significant hypokalemia, especially with high-dose or nebulised salbutamol. This can predispose to arrhythmias.
What this interaction means in plain words
Chlorthalidone 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.
Chlorthalidone belongs to Cardiovascular; Salbutamol belongs to Respiratory.
Why it happens
Additive hypokalemia: intracellular potassium shift from beta-2 stimulation plus renal potassium loss from the thiazide-like diuretic.
What to do
Monitor serum potassium and replace if low, particularly in patients with cardiac disease or on digoxin.
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
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Salbutamol?
MediHelp rates the interaction as moderate. Chlorthalidone 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. Both drugs can lower serum potassium, and together they may cause significant hypokalemia, especially with high-dose or nebulised salbutamol. This can predispose to arrhythmias.
How serious is the interaction between Chlorthalidone 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 serum potassium and replace if low, particularly in patients with cardiac disease or on digoxin.
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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