Drug interactions
Magnesium hydroxide + Raltegravir
Severity: Major
Magnesium hydroxide and Raltegravir: major 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-containing antacids bind raltegravir in the gut and can reduce its plasma concentrations. Lower exposure may risk virologic failure and resistance, particularly with the once-daily 1200 mg regimen.
What this interaction means in plain words
Magnesium hydroxide and Raltegravir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Magnesium hydroxide belongs to Gastrointestinal Tract; Raltegravir belongs to Anti Virals.
Why it happens
Chelation of raltegravir by magnesium cations in the gastrointestinal tract reduces absorption.
What to do
Avoid concomitant use with magnesium-containing antacids; if unavoidable, separate dosing by at least 6 hours. Use a non-cation acid suppressant alternative if possible.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Magnesium hydroxide
Other interactions of Raltegravir
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Raltegravir Contraindicated
- Aluminum hydroxide / magnesium carbonate + Raltegravir Major
- Aluminum hydroxide / magnesium trisilicate + Raltegravir Major
- Aluminum hydroxide + Raltegravir Major
- Atidarsagene autotemcel + Raltegravir Major
- Betibeglogene autotemcel + Raltegravir Major
Frequently asked questions
Can I take Magnesium hydroxide with Raltegravir?
MediHelp rates the interaction as major. Magnesium hydroxide and Raltegravir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Magnesium-containing antacids bind raltegravir in the gut and can reduce its plasma concentrations. Lower exposure may risk virologic failure and resistance, particularly with the once-daily 1200 mg regimen.
How serious is the interaction between Magnesium hydroxide and Raltegravir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concomitant use with magnesium-containing antacids; if unavoidable, separate dosing by at least 6 hours. Use a non-cation acid suppressant alternative if possible.
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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