Drug interactions
Chlorthalidone + Magnesium hydroxide
Severity: Minor
Chlorthalidone and Magnesium hydroxide: 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
Thiazide-like diuretics increase urinary magnesium loss and can cause hypomagnesemia over time. Magnesium hydroxide is an oral magnesium source, so the effect is of limited importance.
What this interaction means in plain words
Chlorthalidone and Magnesium hydroxide 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; Magnesium hydroxide belongs to Gastrointestinal Tract.
Why it happens
Chlorthalidone increases renal magnesium excretion in the distal tubule.
What to do
Monitor serum magnesium during long-term therapy and supplement if low.
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 Magnesium hydroxide
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Magnesium hydroxide?
MediHelp rates the interaction as minor. Chlorthalidone and Magnesium hydroxide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Thiazide-like diuretics increase urinary magnesium loss and can cause hypomagnesemia over time. Magnesium hydroxide is an oral magnesium source, so the effect is of limited importance.
How serious is the interaction between Chlorthalidone and Magnesium hydroxide?
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 during long-term therapy and supplement if low.
What other medicines interact with Magnesium hydroxide?
MediHelp also lists interactions of Magnesium hydroxide with, for example, Ciprofloxacin, Dolutegravir, Gemifloxacin. The full list is on the Magnesium hydroxide page.
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