Drug interactions
Chlorthalidone + Pirbuterol
Severity: Moderate
Chlorthalidone and Pirbuterol: 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, so the combination may cause additive hypokalemia. This raises the risk of arrhythmias, particularly in patients with cardiac disease or on other QT-prolonging drugs.
What this interaction means in plain words
Chlorthalidone and Pirbuterol 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
Beta-2 stimulation shifts potassium into cells while the thiazide-like diuretic increases renal potassium excretion.
What to do
Monitor serum potassium and magnesium, especially with frequent pirbuterol use. Correct deficits with supplementation as 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?
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Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Pirbuterol?
MediHelp rates the interaction as moderate. Chlorthalidone and Pirbuterol 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, so the combination may cause additive hypokalemia. This raises the risk of arrhythmias, particularly in patients with cardiac disease or on other QT-prolonging drugs.
How serious is the interaction between Chlorthalidone and Pirbuterol?
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 magnesium, especially with frequent pirbuterol use. Correct deficits with supplementation as needed.
What other medicines interact with Chlorthalidone?
MediHelp also lists interactions of Chlorthalidone with, for example, Amifostine, Atenolol-chlorthalidone, Candesartan-hydrochlorothiazide. The full list is on the Chlorthalidone page.
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