Drug interactions
Oxacillin + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Oxacillin and Sodium picosulfate / magnesium oxide / anhydrous citric acid: 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 is a prodrug activated by colonic bacteria, so antibacterial therapy may reduce its conversion and weaken the laxative effect. This can result in inadequate bowel cleansing before colonoscopy.
What this interaction means in plain words
Oxacillin and Sodium picosulfate / magnesium oxide / anhydrous citric acid 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 flora reduces bacterial hydrolysis of picosulfate to its active metabolite.
What to do
If possible avoid giving the antibiotic during the bowel preparation window, or confirm adequate cleansing and consider a rescue or alternative preparation if the result is poor.
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 Oxacillin
- Bcg vaccine live + Oxacillin Moderate
- Chloramphenicol + Oxacillin Moderate
- Cholera vaccine + Oxacillin Moderate
- Demeclocycline + Oxacillin Moderate
- Doxycycline + Oxacillin Moderate
- Microbiota + Oxacillin Moderate
Frequently asked questions
Can I take Oxacillin with Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Oxacillin and Sodium picosulfate / magnesium oxide / anhydrous citric acid 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 is a prodrug activated by colonic bacteria, so antibacterial therapy may reduce its conversion and weaken the laxative effect. This can result in inadequate bowel cleansing before colonoscopy.
How serious is the interaction between Oxacillin and Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If possible avoid giving the antibiotic during the bowel preparation window, or confirm adequate cleansing and consider a rescue or alternative preparation if the result is poor.
What other medicines interact with Oxacillin?
MediHelp also lists interactions of Oxacillin with, for example, Bcg vaccine live, Chloramphenicol, Cholera vaccine. The full list is on the Oxacillin page.
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