Drug interactions
Cefadroxil + Neomycin po
Severity: Moderate
Cefadroxil and Neomycin po: 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
Oral neomycin is poorly absorbed, but systemic absorption can occur with impaired gut mucosa or renal impairment, and it is nephrotoxic and ototoxic. Combined with cephalosporins, additive kidney injury has been suggested. Cefadroxil itself is only weakly nephrotoxic.
What this interaction means in plain words
Cefadroxil and Neomycin po 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.
Why it happens
Potential additive nephrotoxicity from systemically absorbed neomycin with reduced renal clearance of both drugs.
What to do
Monitor renal function, especially with renal impairment or prolonged neomycin use. Adjust cefadroxil dose to creatinine clearance.
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 Cefadroxil
- Amikacin + Cefadroxil Moderate
- Avelumab + Cefadroxil Moderate
- Balstilimab + Cefadroxil Moderate
- Bcg vaccine live + Cefadroxil Moderate
- Cefadroxil + Cholera vaccine Moderate
- Cefadroxil + Gentamicin Moderate
Frequently asked questions
Can I take Cefadroxil with Neomycin po?
MediHelp rates the interaction as moderate. Cefadroxil and Neomycin po 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. Oral neomycin is poorly absorbed, but systemic absorption can occur with impaired gut mucosa or renal impairment, and it is nephrotoxic and ototoxic. Combined with cephalosporins, additive kidney injury has been suggested. Cefadroxil itself is only weakly nephrotoxic.
How serious is the interaction between Cefadroxil and Neomycin po?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor renal function, especially with renal impairment or prolonged neomycin use. Adjust cefadroxil dose to creatinine clearance.
What other medicines interact with Cefadroxil?
MediHelp also lists interactions of Cefadroxil with, for example, Amikacin, Avelumab, Balstilimab. The full list is on the Cefadroxil page.
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