Drug interactions
Ampicillin + Microbiota
Severity: Moderate
Ampicillin 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
Oral microbiota products contain live bacterial spores meant to recolonize the gut. Concurrent ampicillin may act against them, lowering engraftment and effectiveness.
What this interaction means in plain words
Ampicillin 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 of ampicillin against the live microbiota components reduces colonization (pharmacodynamic antagonism).
What to do
Complete the antibiotic course and wait at least 2 to 4 days before starting oral microbiota, per labeling.
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 Ampicillin
- Allopurinol + Ampicillin Moderate
- Ampicillin + Bcg vaccine live Moderate
- Ampicillin + Chloramphenicol Moderate
- Ampicillin + Chloroquine Moderate
- Ampicillin + Cholera vaccine Moderate
- Ampicillin + Demeclocycline Moderate
Frequently asked questions
Can I take Ampicillin with Microbiota?
MediHelp rates the interaction as moderate. Ampicillin 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. Oral microbiota products contain live bacterial spores meant to recolonize the gut. Concurrent ampicillin may act against them, lowering engraftment and effectiveness.
How serious is the interaction between Ampicillin 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 wait at least 2 to 4 days before starting oral microbiota, per labeling.
What other medicines interact with Ampicillin?
MediHelp also lists interactions of Ampicillin with, for example, Allopurinol, Bcg vaccine live, Chloramphenicol. The full list is on the Ampicillin page.
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