Drug interactions
Hydrochlorothiazide + Magnesium sulfate
Severity: Minor
Hydrochlorothiazide 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
Hydrochlorothiazide increases renal magnesium excretion, so serum magnesium may fall or respond less to replacement. The clinical impact is usually small and is handled by monitoring.
What this interaction means in plain words
Hydrochlorothiazide 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
Thiazides increase urinary magnesium loss.
What to do
Check serum magnesium and potassium during magnesium repletion and with long-term thiazide use, and adjust dosing to the result.
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 Hydrochlorothiazide
Frequently asked questions
Can I take Hydrochlorothiazide with Magnesium sulfate?
MediHelp rates the interaction as minor. Hydrochlorothiazide 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. Hydrochlorothiazide increases renal magnesium excretion, so serum magnesium may fall or respond less to replacement. The clinical impact is usually small and is handled by monitoring.
How serious is the interaction between Hydrochlorothiazide 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: Check serum magnesium and potassium during magnesium repletion and with long-term thiazide use, and adjust dosing to the result.
What other medicines interact with Hydrochlorothiazide?
MediHelp also lists interactions of Hydrochlorothiazide with, for example, Dofetilide, Amifostine, Amiodarone. The full list is on the Hydrochlorothiazide page.
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