Drug interactions
Cefazolin + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Cefazolin 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 that must be converted to its active laxative form by colonic bacteria. Antibiotics that suppress colonic flora may reduce this activation and lead to poorer bowel cleansing before colonoscopy. Cefazolin is given parenterally, so the effect is likely smaller than with oral antibiotics, but labeling advises caution.
What this interaction means in plain words
Cefazolin 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 bacteria needed to convert sodium picosulfate to its active metabolite.
What to do
Assess bowel preparation adequacy before the procedure and consider extra preparation or rescheduling if cleansing is poor. Where possible, avoid starting antibiotics around the time of the preparation.
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 Cefazolin
- Amikacin + Cefazolin Moderate
- Bcg vaccine live + Cefazolin Moderate
- Cefazolin + Cholera vaccine Moderate
- Cefazolin + Dexamethasone-tobramycin Moderate
- Cefazolin + Gentamicin Moderate
- Cefazolin + Kanamycin Moderate
Frequently asked questions
Can I take Cefazolin with Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Cefazolin 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 that must be converted to its active laxative form by colonic bacteria. Antibiotics that suppress colonic flora may reduce this activation and lead to poorer bowel cleansing before colonoscopy. Cefazolin is given parenterally, so the effect is likely smaller than with oral antibiotics, but labeling advises caution.
How serious is the interaction between Cefazolin 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: Assess bowel preparation adequacy before the procedure and consider extra preparation or rescheduling if cleansing is poor. Where possible, avoid starting antibiotics around the time of the preparation.
What other medicines interact with Cefazolin?
MediHelp also lists interactions of Cefazolin with, for example, Amikacin, Bcg vaccine live, Cholera vaccine. The full list is on the Cefazolin page.
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