Drug interactions
Ciprofloxacin + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Ciprofloxacin 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
The magnesium in the bowel preparation chelates oral ciprofloxacin and reduces its absorption. Antibiotics may also reduce the laxative effect by disrupting the colonic bacteria that activate picosulfate, possibly compromising bowel cleansing.
What this interaction means in plain words
Ciprofloxacin 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
Magnesium chelation of ciprofloxacin in the gut, and antibiotic suppression of colonic flora needed to activate sodium picosulfate.
What to do
Take ciprofloxacin at least 2 hours before or 6 hours after the preparation. Be aware that bowel cleansing may be less effective after antibiotics.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Frequently asked questions
Can I take Ciprofloxacin with Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Ciprofloxacin 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. The magnesium in the bowel preparation chelates oral ciprofloxacin and reduces its absorption. Antibiotics may also reduce the laxative effect by disrupting the colonic bacteria that activate picosulfate, possibly compromising bowel cleansing.
How serious is the interaction between Ciprofloxacin 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: Take ciprofloxacin at least 2 hours before or 6 hours after the preparation. Be aware that bowel cleansing may be less effective after antibiotics.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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