Drug interactions
Azithromycin + Penicillin g aqueous
Severity: Minor
Azithromycin and Penicillin g aqueous: 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
Azithromycin is bacteriostatic and may theoretically reduce the bactericidal effect of penicillin G. Clinical studies have not shown consistent harm, and the combination is often used deliberately, for example in pneumonia.
What this interaction means in plain words
Azithromycin and Penicillin g aqueous 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
Theoretical pharmacodynamic antagonism, as slowing bacterial growth may reduce the activity of cell-wall-active penicillin G.
What to do
No routine change is needed. Monitor clinical response in severe infections where bactericidal activity is essential.
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 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 Penicillin g aqueous?
MediHelp rates the interaction as minor. Azithromycin and Penicillin g aqueous 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 is bacteriostatic and may theoretically reduce the bactericidal effect of penicillin G. Clinical studies have not shown consistent harm, and the combination is often used deliberately, for example in pneumonia.
How serious is the interaction between Azithromycin and Penicillin g aqueous?
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. Monitor clinical response in severe infections where bactericidal activity is essential.
What other medicines interact with Azithromycin?
MediHelp also lists interactions of Azithromycin with, for example, Cisapride, Domperidone, Dronedarone. The full list is on the Azithromycin page.
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