Drug interactions
Arformoterol + Chlorthalidone
Severity: Moderate
Arformoterol and Chlorthalidone: 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
Arformoterol can lower serum potassium, and chlorthalidone adds to this effect through renal potassium loss. Marked hypokalemia can promote cardiac arrhythmias.
What this interaction means in plain words
Arformoterol and Chlorthalidone 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.
Arformoterol belongs to Respiratory; Chlorthalidone belongs to Cardiovascular.
Why it happens
Beta-2 agonist driven intracellular potassium shift combined with diuretic-induced renal potassium wasting.
What to do
Check serum potassium at baseline and periodically, and correct hypokalemia, especially in patients with cardiac disease.
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
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Chlorthalidone?
MediHelp rates the interaction as moderate. Arformoterol and Chlorthalidone 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. Arformoterol can lower serum potassium, and chlorthalidone adds to this effect through renal potassium loss. Marked hypokalemia can promote cardiac arrhythmias.
How serious is the interaction between Arformoterol and Chlorthalidone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium at baseline and periodically, and correct hypokalemia, especially in patients with cardiac disease.
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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