Drug interactions
Magnesium citrate + Methyclothiazide
Severity: Minor
Magnesium citrate and Methyclothiazide: 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 diuretics such as methyclothiazide can cause renal magnesium wasting and lead to hypomagnesemia with chronic use. Intermittent magnesium citrate use is generally insufficient to correct this, and low magnesium may worsen potassium depletion and arrhythmia risk.
What this interaction means in plain words
Magnesium citrate and Methyclothiazide 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 act on the distal convoluted tubule, which reduces expression of magnesium transport channels and increases urinary magnesium loss.
What to do
Check serum magnesium and potassium periodically during long-term thiazide therapy and supplement magnesium if deficient.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Magnesium citrate and Methyclothiazide, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Magnesium citrate
- Ciprofloxacin + Magnesium citrate Major
- Baloxavir marboxil + Magnesium citrate Moderate
- Bictegravir + Magnesium citrate Moderate
- Cabotegravir + Magnesium citrate Moderate
- Cholecalciferol + Magnesium citrate Moderate
- Deferiprone + Magnesium citrate Moderate
Frequently asked questions
Can I take Magnesium citrate with Methyclothiazide?
MediHelp rates the interaction as minor. Magnesium citrate and Methyclothiazide 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 diuretics such as methyclothiazide can cause renal magnesium wasting and lead to hypomagnesemia with chronic use. Intermittent magnesium citrate use is generally insufficient to correct this, and low magnesium may worsen potassium depletion and arrhythmia risk.
How serious is the interaction between Magnesium citrate and Methyclothiazide?
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 periodically during long-term thiazide therapy and supplement magnesium if deficient.
What other medicines interact with Magnesium citrate?
MediHelp also lists interactions of Magnesium citrate with, for example, Ciprofloxacin, Baloxavir marboxil, Bictegravir. The full list is on the Magnesium citrate page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
