Cephalexin and Metformin: Drug Interaction Guide
Quick answer: Cephalexin and Metformin have a minor interaction — typically manageable with awareness.
How Cephalexin interacts with Metformin
Cephalexin can reduce the renal tubular secretion of metformin, producing a modest increase in metformin exposure.
What you should do
No routine dose change is usually required. Monitor glucose control and metformin intolerance, particularly in patients with impaired renal function.
Key facts
Severity
Minor — typically manageable
Mechanism
Cephalexin can reduce the renal tubular secretion of metformin, producing a modest increase in metformin exposure.
Action
No routine dose change is usually required. Monitor glucose control and metformin intolerance, particularly in patients ...
Frequently asked questions
Can I take Cephalexin and Metformin together?
Usually yes, with awareness. No routine dose change is usually required. Monitor glucose control and metformin intolerance, particularly in patients with impaired renal function.
What is the severity of this interaction?
The interaction between Cephalexin and Metformin is classified as Minor — typically manageable. Cephalexin can reduce the renal tubular secretion of metformin, producing a modest increase in metformin exposure.
What should I do if I'm prescribed both?
No routine dose change is usually required. Monitor glucose control and metformin intolerance, particularly in 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.