Drug interactions
Erythromycin base + Piperacillin-tazobactam
Severity: Minor
Erythromycin base and Piperacillin-tazobactam: 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
Bacteriostatic macrolides may theoretically reduce the bactericidal effect of beta-lactams. Clinical evidence of worse outcomes is limited, and the combination is often used deliberately, for example in community-acquired pneumonia.
What this interaction means in plain words
Erythromycin base and Piperacillin-tazobactam have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Pharmacodynamic antagonism: inhibition of bacterial protein synthesis may reduce growth-dependent beta-lactam killing.
What to do
No change is generally needed when dual therapy is indicated. Reassess the need for the macrolide once pathogens are identified.
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-tazobactam
Frequently asked questions
Can I take Erythromycin base with Piperacillin-tazobactam?
MediHelp rates the interaction as minor. Erythromycin base and Piperacillin-tazobactam have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Bacteriostatic macrolides may theoretically reduce the bactericidal effect of beta-lactams. Clinical evidence of worse outcomes is limited, and the combination is often used deliberately, for example in community-acquired pneumonia.
How serious is the interaction between Erythromycin base and Piperacillin-tazobactam?
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 change is generally needed when dual therapy is indicated. Reassess the need for the macrolide once pathogens are identified.
What other medicines interact with Piperacillin-tazobactam?
MediHelp also lists interactions of Piperacillin-tazobactam with, for example, Vancomycin, Amikacin, Antithrombin alfa. The full list is on the Piperacillin-tazobactam page.
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