Drug interactions
Azithromycin + Piperacillin
Severity: Minor
Azithromycin and Piperacillin: minor 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
Theoretically, a bacteriostatic macrolide could blunt the killing activity of a bactericidal beta-lactam. Clinical evidence of reduced outcomes is inconsistent, and the combination is often used deliberately for community-acquired pneumonia.
What this interaction means in plain words
Azithromycin and Piperacillin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Azithromycin belongs to Anti Bacterial; Piperacillin belongs to Anti Bacterial.
Why it happens
Proposed pharmacodynamic antagonism, as beta-lactams need actively dividing bacteria and bacteriostatic agents slow growth.
What to do
No routine change is needed when combination therapy is indicated, such as for atypical coverage. Reassess the regimen if the clinical response is poor.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Piperacillin
- Piperacillin + Vancomycin Major
- Acetylsalicylic acid + Piperacillin Moderate
- Amikacin + Piperacillin Moderate
- Antithrombin alfa + Piperacillin Moderate
- Antithrombin iii + Piperacillin Moderate
- Argatroban + Piperacillin Moderate
Other interactions of Azithromycin
- Azithromycin + Cisapride Contraindicated
- Azithromycin + Domperidone Contraindicated
- Azithromycin + Dronedarone Contraindicated
- Azithromycin + Pimozide Contraindicated
- Azithromycin + Piperaquine Contraindicated
- Azithromycin + Thioridazine Contraindicated
Frequently asked questions
Can I take Azithromycin with Piperacillin?
MediHelp rates the interaction as minor. Azithromycin and Piperacillin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Theoretically, a bacteriostatic macrolide could blunt the killing activity of a bactericidal beta-lactam. Clinical evidence of reduced outcomes is inconsistent, and the combination is often used deliberately for community-acquired pneumonia.
How serious is the interaction between Azithromycin and Piperacillin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed when combination therapy is indicated, such as for atypical coverage. Reassess the regimen if the clinical response is poor.
What other medicines interact with Piperacillin?
MediHelp also lists interactions of Piperacillin with, for example, Vancomycin, Acetylsalicylic acid, Amikacin. The full list is on the Piperacillin page.
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