Drug interactions
Sodium picosulfate / magnesium oxide / anhydrous citric acid + Vancomycin
Severity: Moderate
Sodium picosulfate / magnesium oxide / anhydrous citric acid and Vancomycin: 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
Sodium picosulfate needs conversion by colonic bacteria to its active form. Antibiotics that disrupt colonic flora may reduce this activation and lead to poorer bowel cleansing. Oral vancomycin acts in the gut lumen, so the effect is plausible; systemic IV vancomycin is less likely to matter.
What this interaction means in plain words
Sodium picosulfate / magnesium oxide / anhydrous citric acid and Vancomycin 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.
Why it happens
Antibiotic suppression of colonic bacteria reduces conversion of picosulfate to its active laxative metabolite.
What to do
Avoid oral vancomycin around the time of bowel preparation where possible, or confirm adequate cleansing before the procedure. Consider an alternative bowel preparation if oral antibiotics are required.
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 Vancomycin
- Amikacin + Vancomycin Major
- Bacitracin + Vancomycin Major
- Capreomycin + Vancomycin Major
- Cephaloridine + Vancomycin Major
- Cidofovir + Vancomycin Major
- Cisplatin + Vancomycin Major
Frequently asked questions
Can I take Sodium picosulfate / magnesium oxide / anhydrous citric acid with Vancomycin?
MediHelp rates the interaction as moderate. Sodium picosulfate / magnesium oxide / anhydrous citric acid and Vancomycin 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. Sodium picosulfate needs conversion by colonic bacteria to its active form. Antibiotics that disrupt colonic flora may reduce this activation and lead to poorer bowel cleansing. Oral vancomycin acts in the gut lumen, so the effect is plausible; systemic IV vancomycin is less likely to matter.
How serious is the interaction between Sodium picosulfate / magnesium oxide / anhydrous citric acid and Vancomycin?
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 oral vancomycin around the time of bowel preparation where possible, or confirm adequate cleansing before the procedure. Consider an alternative bowel preparation if oral antibiotics are required.
What other medicines interact with Vancomycin?
MediHelp also lists interactions of Vancomycin with, for example, Amikacin, Bacitracin, Capreomycin. The full list is on the Vancomycin page.
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