Drug interactions
Chlorthalidone + Terbutaline
Severity: Moderate
Chlorthalidone and Terbutaline: 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 combined use may produce clinically significant hypokalemia. This raises the risk of muscle weakness and cardiac arrhythmias, particularly at higher terbutaline doses or in patients with heart disease.
What this interaction means in plain words
Chlorthalidone and Terbutaline 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; Terbutaline belongs to Respiratory.
Why it happens
Beta-2 agonist-driven intracellular potassium shift combined with renal potassium loss from thiazide-like diuresis.
What to do
Monitor serum potassium and replace as needed, especially with high-dose or repeated terbutaline. Consider potassium supplementation or a potassium-sparing agent in at-risk patients.
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 Terbutaline
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Terbutaline?
MediHelp rates the interaction as moderate. Chlorthalidone and Terbutaline 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 combined use may produce clinically significant hypokalemia. This raises the risk of muscle weakness and cardiac arrhythmias, particularly at higher terbutaline doses or in patients with heart disease.
How serious is the interaction between Chlorthalidone and Terbutaline?
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 as needed, especially with high-dose or repeated terbutaline. Consider potassium supplementation or a potassium-sparing agent in at-risk patients.
What other medicines interact with Terbutaline?
MediHelp also lists interactions of Terbutaline with, for example, Carvedilol, Droperidol, Fexinidazole. The full list is on the Terbutaline page.
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