Cephalexin and Probenecid: Drug Interaction Guide

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

Interaction severity: Minor — typically manageable

How Cephalexin interacts with Probenecid

Probenecid inhibits renal organic anion transport and decreases tubular secretion of cephalexin, increasing and prolonging cephalexin exposure.

What you should do

Routine intervention is generally unnecessary, but monitor for cephalexin intolerance and consider the interaction when treating patients with impaired renal function.

Key facts

Severity

Minor — typically manageable

Mechanism

Probenecid inhibits renal organic anion transport and decreases tubular secretion of cephalexin, increasing and prolongi...

Action

Routine intervention is generally unnecessary, but monitor for cephalexin intolerance and consider the interaction when ...

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 Cephalexin and Probenecid together?

Usually yes, with awareness. Routine intervention is generally unnecessary, but monitor for cephalexin intolerance and consider the interaction when treating patients with impaired renal function.

What is the severity of this interaction?

The interaction between Cephalexin and Probenecid is classified as Minor — typically manageable. Probenecid inhibits renal organic anion transport and decreases tubular secretion of cephalexin, increasing and prolonging cephalexin exposure.

What should I do if I'm prescribed both?

Routine intervention is generally unnecessary, but monitor for cephalexin intolerance and consider the interaction when treating patients with impaired renal function. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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