Drug interactions
Atenolol-chlorthalidone + Pirbuterol
Severity: Moderate
Atenolol-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
Pirbuterol can lower serum potassium and chlorthalidone adds renal potassium loss, raising the risk of hypokalemia and arrhythmia. Atenolol can also antagonize the bronchodilator effect of pirbuterol, though it is relatively beta-1 selective.
What this interaction means in plain words
Atenolol-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
Additive hypokalemia and beta-receptor antagonism opposing bronchodilation.
What to do
Monitor serum potassium and respiratory response. Use the lowest atenolol dose possible in patients with reactive airway 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 Atenolol-chlorthalidone
Frequently asked questions
Can I take Atenolol-chlorthalidone with Pirbuterol?
MediHelp rates the interaction as moderate. Atenolol-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. Pirbuterol can lower serum potassium and chlorthalidone adds renal potassium loss, raising the risk of hypokalemia and arrhythmia. Atenolol can also antagonize the bronchodilator effect of pirbuterol, though it is relatively beta-1 selective.
How serious is the interaction between Atenolol-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 respiratory response. Use the lowest atenolol dose possible in patients with reactive airway disease.
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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