Drug interactions
Omadacycline + Penicillin g
Severity: Moderate
Omadacycline and Penicillin g: 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 blunt the bactericidal effect of penicillins, which depend on actively dividing bacteria. The clinical significance is uncertain and mostly shown in vitro and in older clinical reports, but it may matter in severe infections such as meningitis or endocarditis.
What this interaction means in plain words
Omadacycline and Penicillin g 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.
Omadacycline belongs to Anti Bacterial; Penicillin g belongs to Anti Bacterial.
Why it happens
Tetracycline-induced inhibition of bacterial protein synthesis and growth reduces the activity of cell-wall-active beta-lactams.
What to do
Avoid the combination in severe infections where bactericidal activity is essential. If both are needed, monitor clinical response and consider alternative agents.
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 Penicillin g
- Amifampridine + Penicillin g Moderate
- Amiloride + Penicillin g Moderate
- Bcg vaccine live + Penicillin g Moderate
- Cholera vaccine + Penicillin g Moderate
- Colestipol + Penicillin g Moderate
- Deflazacort + Penicillin g Moderate
Other interactions of Omadacycline
- Acitretin + Omadacycline Contraindicated
- Isotretinoin + Omadacycline Major
- Omadacycline + Tretinoin Major
- Aluminum hydroxide + Omadacycline Moderate
- Amoxicillin-clavulanic acid + Omadacycline Moderate
- Amoxicillin + Omadacycline Moderate
Frequently asked questions
Can I take Omadacycline with Penicillin g?
MediHelp rates the interaction as moderate. Omadacycline and Penicillin g 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 blunt the bactericidal effect of penicillins, which depend on actively dividing bacteria. The clinical significance is uncertain and mostly shown in vitro and in older clinical reports, but it may matter in severe infections such as meningitis or endocarditis.
How serious is the interaction between Omadacycline and Penicillin g?
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 where bactericidal activity is essential. If both are needed, monitor clinical response and consider alternative agents.
What other medicines interact with Penicillin g?
MediHelp also lists interactions of Penicillin g with, for example, Amifampridine, Amiloride, Bcg vaccine live. The full list is on the Penicillin g page.
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