Drug interactions
Penicillin vk + Probenecid
Severity: Minor
Penicillin vk and Probenecid: 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
Probenecid reduces renal tubular secretion of penicillins, raising and prolonging penicillin V concentrations. This is sometimes used deliberately to boost antibiotic levels, but it may increase the risk of dose-related adverse effects.
What this interaction means in plain words
Penicillin vk and Probenecid 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
Probenecid competitively inhibits organic anion transporters (OAT1/OAT3) in the renal tubule, decreasing penicillin secretion.
What to do
No action is needed when the effect is intended. Otherwise monitor for penicillin adverse effects, especially in renal impairment or at high doses.
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 Probenecid
- Ketorolac intranasal + Probenecid Contraindicated
- Ketorolac + Probenecid Contraindicated
- Baricitinib + Probenecid Major
- Ceftazidime / avibactam + Probenecid Major
- Methotrexate + Probenecid Major
- Pralatrexate + Probenecid Major
Frequently asked questions
Can I take Penicillin vk with Probenecid?
MediHelp rates the interaction as minor. Penicillin vk and Probenecid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Probenecid reduces renal tubular secretion of penicillins, raising and prolonging penicillin V concentrations. This is sometimes used deliberately to boost antibiotic levels, but it may increase the risk of dose-related adverse effects.
How serious is the interaction between Penicillin vk and Probenecid?
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 action is needed when the effect is intended. Otherwise monitor for penicillin adverse effects, especially in renal impairment or at high doses.
What other medicines interact with Probenecid?
MediHelp also lists interactions of Probenecid with, for example, Ketorolac intranasal, Ketorolac, Baricitinib. The full list is on the Probenecid page.
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