Drug interactions
Atenolol + Chlorthalidone
Severity: Minor
Atenolol and Chlorthalidone: minor 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
This is a frequently used antihypertensive combination with additive blood pressure lowering. Thiazide-induced hypokalemia is not meaningfully offset by atenolol, and both drugs can modestly worsen glucose tolerance.
What this interaction means in plain words
Atenolol and Chlorthalidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Atenolol belongs to Cardiovascular; Chlorthalidone belongs to Cardiovascular.
Why it happens
Additive antihypertensive effects through diuresis and beta-adrenergic blockade, with possible additive metabolic effects.
What to do
Monitor blood pressure, heart rate and serum potassium. Check glucose in patients with diabetes.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Chlorthalidone
Other interactions of Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Chlorthalidone?
MediHelp rates the interaction as minor. Atenolol and Chlorthalidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. This is a frequently used antihypertensive combination with additive blood pressure lowering. Thiazide-induced hypokalemia is not meaningfully offset by atenolol, and both drugs can modestly worsen glucose tolerance.
How serious is the interaction between Atenolol and Chlorthalidone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, heart rate and serum potassium. Check glucose in patients with diabetes.
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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