Cefalexin and Probenecid: Drug Interaction Guide
Quick answer: Cefalexin and Probenecid have a minor interaction — typically manageable with awareness.
How Cefalexin interacts with Probenecid
Probenecid inhibits renal organic anion transporters responsible for tubular secretion of cefalexin, increasing and prolonging cefalexin concentrations.
What you should do
No routine adjustment is usually needed when the effect is intentional. Monitor for beta-lactam adverse effects in patients with renal impairment or when high doses are used.
Key facts
Severity
Minor — typically manageable
Mechanism
Probenecid inhibits renal organic anion transporters responsible for tubular secretion of cefalexin, increasing and prol...
Action
No routine adjustment is usually needed when the effect is intentional. Monitor for beta-lactam adverse effects in patie...
Frequently asked questions
Can I take Cefalexin and Probenecid together?
Usually yes, with awareness. No routine adjustment is usually needed when the effect is intentional. Monitor for beta-lactam adverse effects in patients with renal impairment or when high doses are used.
What is the severity of this interaction?
The interaction between Cefalexin and Probenecid is classified as Minor — typically manageable. Probenecid inhibits renal organic anion transporters responsible for tubular secretion of cefalexin, increasing and prolonging cefalexin concentrations.
What should I do if I'm prescribed both?
No routine adjustment is usually needed when the effect is intentional. Monitor for beta-lactam adverse effects in patients with renal impairment or when high doses are used. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.