Drug interactions
Ampicillin + Oxytetracycline
Severity: Moderate
Ampicillin and Oxytetracycline: 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
Bacteriostatic tetracyclines may interfere with the bactericidal action of ampicillin. Clinical data are limited, but reduced response is possible in severe infections.
What this interaction means in plain words
Ampicillin and Oxytetracycline 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.
Ampicillin belongs to Anti Bacterial; Oxytetracycline belongs to Anti Bacterial.
Why it happens
Tetracycline-induced inhibition of bacterial protein synthesis halts growth, reducing the killing effect of cell-wall-active penicillins.
What to do
Avoid the combination in severe infections needing bactericidal therapy. Otherwise monitor for reduced clinical response.
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
Other interactions of Oxytetracycline
- Isotretinoin + Oxytetracycline Contraindicated
- Aluminum hydroxide + Oxytetracycline Moderate
- Ampicillin-sulbactam + Oxytetracycline Moderate
- Atracurium + Oxytetracycline Moderate
- Bismuth subsalicylate + Oxytetracycline Moderate
- Calcium carbonate + Oxytetracycline Moderate
Frequently asked questions
Can I take Ampicillin with Oxytetracycline?
MediHelp rates the interaction as moderate. Ampicillin and Oxytetracycline 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. Bacteriostatic tetracyclines may interfere with the bactericidal action of ampicillin. Clinical data are limited, but reduced response is possible in severe infections.
How serious is the interaction between Ampicillin and Oxytetracycline?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination in severe infections needing bactericidal therapy. Otherwise monitor for reduced clinical response.
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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