Drug interactions
Neomycin + Penicillin vk
Severity: Moderate
Neomycin and Penicillin vk: 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 has been reported to reduce the absorption of orally administered penicillin V, possibly lowering its blood levels. The effect may reduce efficacy in systemic infections treated with oral penicillin.
What this interaction means in plain words
Neomycin and Penicillin vk 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
Neomycin may impair intestinal absorption of penicillin V, likely through mucosal effects and malabsorption.
What to do
Avoid the combination if possible, or separate doses and monitor for clinical response to penicillin. Consider a parenteral beta-lactam for serious infections.
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 Neomycin
- Amikacin + Neomycin Major
- Amphotericin b deoxycholate + Neomycin Major
- Capreomycin + Neomycin Major
- Cidofovir + Neomycin Major
- Colistin + Neomycin Major
- Ethacrynic acid + Neomycin Major
Frequently asked questions
Can I take Neomycin with Penicillin vk?
MediHelp rates the interaction as moderate. Neomycin and Penicillin vk 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 has been reported to reduce the absorption of orally administered penicillin V, possibly lowering its blood levels. The effect may reduce efficacy in systemic infections treated with oral penicillin.
How serious is the interaction between Neomycin and Penicillin vk?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, or separate doses and monitor for clinical response to penicillin. Consider a parenteral beta-lactam for serious infections.
What other medicines interact with Neomycin?
MediHelp also lists interactions of Neomycin with, for example, Amikacin, Amphotericin b deoxycholate, Capreomycin. The full list is on the Neomycin page.
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