Drug interactions
Chlorthalidone + Nadolol
Severity: Minor
Chlorthalidone and Nadolol: 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
Together these drugs give additive blood pressure lowering and are used intentionally. Chlorthalidone-induced hypokalemia is not reliably offset by nadolol. Nadolol is renally cleared, so diuretic-induced volume depletion can raise its levels and increase bradycardia or hypotension.
What this interaction means in plain words
Chlorthalidone and Nadolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chlorthalidone belongs to Cardiovascular; Nadolol belongs to Cardiovascular.
Why it happens
Additive antihypertensive effects; reduced renal perfusion may decrease nadolol clearance.
What to do
Monitor heart rate, blood pressure and electrolytes, and reduce the nadolol dose if bradycardia or hypotension develops.
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 Nadolol
Frequently asked questions
Can I take Chlorthalidone with Nadolol?
MediHelp rates the interaction as minor. Chlorthalidone and Nadolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Together these drugs give additive blood pressure lowering and are used intentionally. Chlorthalidone-induced hypokalemia is not reliably offset by nadolol. Nadolol is renally cleared, so diuretic-induced volume depletion can raise its levels and increase bradycardia or hypotension.
How serious is the interaction between Chlorthalidone and Nadolol?
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 heart rate, blood pressure and electrolytes, and reduce the nadolol dose if bradycardia or hypotension develops.
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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