Drug interactions
Atenolol-chlorthalidone + Levalbuterol
Severity: Moderate
Atenolol-chlorthalidone and Levalbuterol: 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
Levalbuterol can lower serum potassium by shifting it into cells, and chlorthalidone causes renal potassium loss. Together they can produce clinically relevant hypokalemia, with a risk of arrhythmia at high doses. Atenolol also antagonizes the bronchodilating effect of levalbuterol, although it is relatively beta-1 selective.
What this interaction means in plain words
Atenolol-chlorthalidone and Levalbuterol 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
Additive hypokalemia from beta-2 mediated intracellular potassium shift and thiazide-like renal potassium wasting, with pharmacologic antagonism at beta receptors.
What to do
Monitor serum potassium and magnesium, particularly with frequent or high-dose levalbuterol. Watch for reduced bronchodilator response, especially in asthma.
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
Frequently asked questions
Can I take Atenolol-chlorthalidone with Levalbuterol?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Levalbuterol 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. Levalbuterol can lower serum potassium by shifting it into cells, and chlorthalidone causes renal potassium loss. Together they can produce clinically relevant hypokalemia, with a risk of arrhythmia at high doses. Atenolol also antagonizes the bronchodilating effect of levalbuterol, although it is relatively beta-1 selective.
How serious is the interaction between Atenolol-chlorthalidone and Levalbuterol?
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, particularly with frequent or high-dose levalbuterol. Watch for reduced bronchodilator response, especially in asthma.
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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