Drug interactions
Cefalexin + Microbiota
Severity: Moderate
Cefalexin and Microbiota: 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
Live bacterial spore products need to establish in the gut after antibiotic therapy for C. difficile. Remaining cefalexin can reduce engraftment and treatment success. Appropriate spacing is therefore needed.
What this interaction means in plain words
Cefalexin and Microbiota 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
Antibacterial activity against the administered live bacteria impairs gut colonization.
What to do
Complete the antibiotic course and observe the labeled washout period before giving the microbiota product. Avoid concurrent systemic antibiotics where possible.
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 Cefalexin
- Amikacin + Cefalexin Moderate
- Avelumab + Cefalexin Moderate
- Balstilimab + Cefalexin Moderate
- Bcg vaccine live + Cefalexin Moderate
- Cefalexin + Cholera vaccine Moderate
- Cefalexin + Kanamycin Moderate
Frequently asked questions
Can I take Cefalexin with Microbiota?
MediHelp rates the interaction as moderate. Cefalexin and Microbiota 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. Live bacterial spore products need to establish in the gut after antibiotic therapy for C. difficile. Remaining cefalexin can reduce engraftment and treatment success. Appropriate spacing is therefore needed.
How serious is the interaction between Cefalexin and Microbiota?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Complete the antibiotic course and observe the labeled washout period before giving the microbiota product. Avoid concurrent systemic antibiotics where possible.
What other medicines interact with Cefalexin?
MediHelp also lists interactions of Cefalexin with, for example, Amikacin, Avelumab, Balstilimab. The full list is on the Cefalexin page.
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