Drug interactions
Magnesium hydroxide + Sodium polystyrene sulfonate
Severity: Moderate
Magnesium hydroxide and Sodium polystyrene sulfonate: 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
Magnesium hydroxide taken with sodium polystyrene sulfonate can lead to metabolic alkalosis because the resin binds the magnesium, leaving bicarbonate unneutralized. Rarely, intestinal obstruction from non-absorbable antacid and resin has been described.
What this interaction means in plain words
Magnesium hydroxide and Sodium polystyrene sulfonate 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.
Magnesium hydroxide belongs to Gastrointestinal Tract; Sodium polystyrene sulfonate belongs to Miscellaneous.
Why it happens
The resin binds magnesium in the gut, preventing neutralization of bicarbonate and leading to systemic alkalosis.
What to do
Avoid giving magnesium-containing antacids or laxatives with the resin, and separate doses by at least 2 hours if both are needed. Monitor acid-base status and electrolytes.
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 hydroxide
Other interactions of Sodium polystyrene sulfonate
Frequently asked questions
Can I take Magnesium hydroxide with Sodium polystyrene sulfonate?
MediHelp rates the interaction as moderate. Magnesium hydroxide and Sodium polystyrene sulfonate 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. Magnesium hydroxide taken with sodium polystyrene sulfonate can lead to metabolic alkalosis because the resin binds the magnesium, leaving bicarbonate unneutralized. Rarely, intestinal obstruction from non-absorbable antacid and resin has been described.
How serious is the interaction between Magnesium hydroxide and Sodium polystyrene sulfonate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid giving magnesium-containing antacids or laxatives with the resin, and separate doses by at least 2 hours if both are needed. Monitor acid-base status and electrolytes.
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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