Drug interactions
Chlorthalidone + Squill
Severity: Major
Chlorthalidone and Squill: 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
Squill has digoxin-like cardiac glycoside activity. Chlorthalidone depletes potassium and magnesium, which increases the risk of glycoside-related arrhythmias.
What this interaction means in plain words
Chlorthalidone and Squill 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
Diuretic-induced hypokalemia and hypomagnesemia sensitize the myocardium to cardiac glycosides.
What to do
Avoid squill if possible. If combined, monitor potassium and magnesium, replace deficits, and watch for arrhythmia or glycoside toxicity.
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 Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Squill?
MediHelp rates the interaction as major. Chlorthalidone and Squill 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. Squill has digoxin-like cardiac glycoside activity. Chlorthalidone depletes potassium and magnesium, which increases the risk of glycoside-related arrhythmias.
How serious is the interaction between Chlorthalidone and Squill?
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 squill if possible. If combined, monitor potassium and magnesium, replace deficits, and watch for arrhythmia or glycoside toxicity.
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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