Drug interactions
Atenolol-chlorthalidone + Bendroflumethiazide
Severity: Major
Atenolol-chlorthalidone and Bendroflumethiazide: major 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
Bendroflumethiazide duplicates the thiazide-like diuretic already present as chlorthalidone. This increases the risk of hypokalaemia, hyponatraemia, hypotension, dehydration and metabolic disturbances without clear added benefit.
What this interaction means in plain words
Atenolol-chlorthalidone and Bendroflumethiazide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Therapeutic duplication of thiazide-type diuretics produces additive natriuresis and potassium loss.
What to do
Avoid combining two thiazide-type diuretics and stop one of them. If unavoidable, monitor electrolytes, renal function and blood pressure closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Atenolol-chlorthalidone
Frequently asked questions
Can I take Atenolol-chlorthalidone with Bendroflumethiazide?
MediHelp rates the interaction as major. Atenolol-chlorthalidone and Bendroflumethiazide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Bendroflumethiazide duplicates the thiazide-like diuretic already present as chlorthalidone. This increases the risk of hypokalaemia, hyponatraemia, hypotension, dehydration and metabolic disturbances without clear added benefit.
How serious is the interaction between Atenolol-chlorthalidone and Bendroflumethiazide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining two thiazide-type diuretics and stop one of them. If unavoidable, monitor electrolytes, renal function and blood pressure closely.
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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