Drug interactions
Chlorthalidone + Magnesium sulfate
Severity: Minor
Chlorthalidone and Magnesium sulfate: 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
Chlorthalidone increases urinary magnesium loss, which may shorten the effect of magnesium sulfate or lead to hypomagnesemia with long-term use. Effect is generally modest.
What this interaction means in plain words
Chlorthalidone and Magnesium sulfate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Thiazide-type diuretics increase renal magnesium excretion.
What to do
Monitor serum magnesium when magnesium sulfate is given repeatedly with chlorthalidone and adjust dosing as needed.
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
Frequently asked questions
Can I take Chlorthalidone with Magnesium sulfate?
MediHelp rates the interaction as minor. Chlorthalidone and Magnesium sulfate 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 increases urinary magnesium loss, which may shorten the effect of magnesium sulfate or lead to hypomagnesemia with long-term use. Effect is generally modest.
How serious is the interaction between Chlorthalidone and Magnesium sulfate?
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 serum magnesium when magnesium sulfate is given repeatedly with chlorthalidone and adjust dosing as needed.
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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