Penicillin and Probenecid: Drug Interaction Guide

Quick answer: Penicillin and Probenecid have a minor interaction — typically manageable with awareness.

Interaction severity: Minor — typically manageable

How Penicillin interacts with Probenecid

Probenecid inhibits renal organic anion transporters, reducing tubular secretion of penicillin. This increases and prolongs penicillin serum concentrations.

What you should do

This interaction is sometimes used therapeutically. Account for increased penicillin exposure and monitor for adverse effects in renal impairment.

Key facts

Severity

Minor — typically manageable

Mechanism

Probenecid inhibits renal organic anion transporters, reducing tubular secretion of penicillin. This increases and prolo...

Action

This interaction is sometimes used therapeutically. Account for increased penicillin exposure and monitor for adverse ef...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Penicillin and Probenecid together?

Usually yes, with awareness. This interaction is sometimes used therapeutically. Account for increased penicillin exposure and monitor for adverse effects in renal impairment.

What is the severity of this interaction?

The interaction between Penicillin and Probenecid is classified as Minor — typically manageable. Probenecid inhibits renal organic anion transporters, reducing tubular secretion of penicillin. This increases and prolongs penicillin serum concentrations.

What should I do if I'm prescribed both?

This interaction is sometimes used therapeutically. Account for increased penicillin exposure and monitor for adverse effects in renal impairment. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.