Drug interactions
Arformoterol + Atenolol-chlorthalidone
Severity: Moderate
Arformoterol and Atenolol-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 and chlorthalidone each can lower serum potassium, and combined use may produce clinically significant hypokalaemia with possible ECG changes or arrhythmia. Atenolol may also reduce the bronchodilator effect of arformoterol.
What this interaction means in plain words
Arformoterol and Atenolol-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; Atenolol-chlorthalidone belongs to Cardiovascular.
Why it happens
Beta-2 agonist driven intracellular potassium shift adds to thiazide-induced renal potassium loss, and beta blockade antagonises the beta-2 agonist.
What to do
Check serum potassium and magnesium at baseline and periodically, and correct deficits. Monitor respiratory control given the beta blocker.
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 Atenolol-chlorthalidone
Other interactions of Arformoterol
Frequently asked questions
Can I take Arformoterol with Atenolol-chlorthalidone?
MediHelp rates the interaction as moderate. Arformoterol and Atenolol-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 and chlorthalidone each can lower serum potassium, and combined use may produce clinically significant hypokalaemia with possible ECG changes or arrhythmia. Atenolol may also reduce the bronchodilator effect of arformoterol.
How serious is the interaction between Arformoterol and Atenolol-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 and magnesium at baseline and periodically, and correct deficits. Monitor respiratory control given the beta blocker.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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