Glimepiride and Trimethoprim Sulfamethoxazole: Drug Interaction Guide

Quick answer: This combination requires caution. Glimepiride and Trimethoprim Sulfamethoxazole can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Glimepiride interacts with Trimethoprim Sulfamethoxazole

Sulfamethoxazole inhibits CYP2C9-mediated glimepiride metabolism, increasing sulfonylurea exposure and the risk of prolonged hypoglycaemia.

What you should do

Prefer another antibiotic when feasible. If combined, consider reducing glimepiride and intensify glucose monitoring during and shortly after antibiotic therapy.

Key facts

Severity

Moderate — caution required

Mechanism

Sulfamethoxazole inhibits CYP2C9-mediated glimepiride metabolism, increasing sulfonylurea exposure and the risk of prolo...

Action

Prefer another antibiotic when feasible. If combined, consider reducing glimepiride and intensify glucose monitoring dur...

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 Trimethoprim Sulfamethoxazole together?

With caution. Prefer another antibiotic when feasible. If combined, consider reducing glimepiride and intensify glucose monitoring during and shortly after antibiotic therapy.

What is the severity of this interaction?

The interaction between Glimepiride and Trimethoprim Sulfamethoxazole is classified as Moderate — caution required. Sulfamethoxazole inhibits CYP2C9-mediated glimepiride metabolism, increasing sulfonylurea exposure and the risk of prolonged hypoglycaemia.

What should I do if I'm prescribed both?

Prefer another antibiotic when feasible. If combined, consider reducing glimepiride and intensify glucose monitoring 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.