Glimepiride and Sulfamethoxazole Trimethoprim: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Glimepiride and Sulfamethoxazole Trimethoprim unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Glimepiride interacts with Sulfamethoxazole Trimethoprim

Sulfamethoxazole-trimethoprim can inhibit sulfonylurea metabolism and may displace protein binding, increasing glimepiride effect. This raises the risk of severe hypoglycemia.

What you should do

Prefer an alternative antibiotic when possible. If combined, reduce sulfonylurea dose and monitor blood glucose closely during and shortly after antibiotic therapy.

Key facts

Severity

Major — avoid combination

Mechanism

Sulfamethoxazole-trimethoprim can inhibit sulfonylurea metabolism and may displace protein binding, increasing glimepiri...

Action

Prefer an alternative antibiotic when possible. If combined, reduce sulfonylurea dose and monitor blood glucose closely ...

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 Glimepiride and Sulfamethoxazole Trimethoprim together?

No — this combination should generally be avoided. Prefer an alternative antibiotic when possible. If combined, reduce sulfonylurea dose and monitor blood glucose closely during and shortly after antibiotic therapy.

What is the severity of this interaction?

The interaction between Glimepiride and Sulfamethoxazole Trimethoprim is classified as Major — avoid combination. Sulfamethoxazole-trimethoprim can inhibit sulfonylurea metabolism and may displace protein binding, increasing glimepiride effect. This raises the risk of severe hypoglycemia.

What should I do if I'm prescribed both?

Prefer an alternative antibiotic when possible. If combined, reduce sulfonylurea dose and monitor blood glucose closely during and shortly after antibiotic therapy. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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