Drug interactions
Erythromycin + Piperacillin
Severity: Minor
Erythromycin 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
A bacteriostatic macrolide could theoretically blunt the activity of a bactericidal beta-lactam. Clinical evidence for relevant antagonism is weak and inconsistent.
What this interaction means in plain words
Erythromycin 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.
Erythromycin belongs to Anti Bacterial; Piperacillin belongs to Anti Bacterial.
Why it happens
Theoretical pharmacodynamic antagonism, as beta-lactams need actively dividing bacteria while bacteriostatic agents slow growth.
What to do
No routine change is needed. Combination therapy is often used intentionally, for example in pneumonia; review the need if the 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 Erythromycin
- Conivaptan + Erythromycin Contraindicated
- Dihydroergotamine intranasal + Erythromycin Contraindicated
- Dihydroergotamine + Erythromycin Contraindicated
- Domperidone + Erythromycin Contraindicated
- Dronedarone + Erythromycin Contraindicated
- Droperidol + Erythromycin Contraindicated
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
Frequently asked questions
Can I take Erythromycin with Piperacillin?
MediHelp rates the interaction as minor. Erythromycin 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. A bacteriostatic macrolide could theoretically blunt the activity of a bactericidal beta-lactam. Clinical evidence for relevant antagonism is weak and inconsistent.
How serious is the interaction between Erythromycin 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. Combination therapy is often used intentionally, for example in pneumonia; review the need if the response is poor.
What other medicines interact with Erythromycin?
MediHelp also lists interactions of Erythromycin with, for example, Conivaptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Erythromycin page.
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