Drug interactions
Chlorthalidone + Magnesium
Severity: Moderate
Chlorthalidone and Magnesium: moderate 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 promote urinary magnesium loss and can cause hypomagnesemia with chronic use. This may contribute to hypokalemia and arrhythmias.
What this interaction means in plain words
Chlorthalidone and Magnesium can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Chlorthalidone belongs to Cardiovascular; Magnesium belongs to Gastrointestinal Tract.
Why it happens
Distal tubule effects, including reduced expression of magnesium transport channels, increase renal magnesium excretion.
What to do
Check serum magnesium and potassium periodically. Replace magnesium if low.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Magnesium
- Ciprofloxacin + Magnesium Major
- Magnesium + Pancuronium Major
- Magnesium + Rocuronium Major
- Magnesium + Vecuronium Major
- Amikacin + Magnesium Moderate
- Amphotericin b deoxycholate + Magnesium Moderate
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Magnesium?
MediHelp rates the interaction as moderate. Chlorthalidone and Magnesium can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Thiazide-like diuretics promote urinary magnesium loss and can cause hypomagnesemia with chronic use. This may contribute to hypokalemia and arrhythmias.
How serious is the interaction between Chlorthalidone and Magnesium?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum magnesium and potassium periodically. Replace magnesium if low.
What other medicines interact with Magnesium?
MediHelp also lists interactions of Magnesium with, for example, Ciprofloxacin, Pancuronium, Rocuronium. The full list is on the Magnesium page.
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