Drug interactions
Piperacillin-tazobactam + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Piperacillin-tazobactam and Sodium picosulfate / magnesium oxide / anhydrous citric acid: moderate interaction.
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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 requires colonic bacteria to convert it to its active laxative metabolite. Antibiotics that reduce colonic flora may lessen bowel cleansing before colonoscopy. Piperacillin-tazobactam has substantial biliary excretion and anaerobic activity, so an effect is plausible.
What this interaction means in plain words
Piperacillin-tazobactam 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 reduces conversion of picosulfate to its active metabolite.
What to do
Assess bowel preparation quality and be ready to extend or repeat the preparation if cleansing is inadequate. Where possible, avoid unnecessary antibiotics during the preparation period.
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 Piperacillin-tazobactam
Frequently asked questions
Can I take Piperacillin-tazobactam with Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Piperacillin-tazobactam 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 requires colonic bacteria to convert it to its active laxative metabolite. Antibiotics that reduce colonic flora may lessen bowel cleansing before colonoscopy. Piperacillin-tazobactam has substantial biliary excretion and anaerobic activity, so an effect is plausible.
How serious is the interaction between Piperacillin-tazobactam 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 quality and be ready to extend or repeat the preparation if cleansing is inadequate. Where possible, avoid unnecessary antibiotics during the preparation period.
What other medicines interact with Piperacillin-tazobactam?
MediHelp also lists interactions of Piperacillin-tazobactam with, for example, Vancomycin, Amikacin, Antithrombin alfa. The full list is on the Piperacillin-tazobactam page.
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