Drug interactions
Glimepiride-pioglitazone + Sulfadiazine
Severity: Moderate
Glimepiride-pioglitazone and Sulfadiazine: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Sulfonamide antibiotics can potentiate the glucose-lowering action of sulfonylureas such as glimepiride, leading to hypoglycemia. The effect is most relevant in older patients and in those with renal or hepatic impairment.
What this interaction means in plain words
Glimepiride-pioglitazone and Sulfadiazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Sulfadiazine may displace glimepiride from plasma proteins and inhibit CYP2C9-mediated metabolism, raising free glimepiride exposure.
What to do
Monitor blood glucose closely when starting or stopping sulfadiazine and counsel the patient on hypoglycemia symptoms. Reduce the glimepiride dose if hypoglycemia occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Glimepiride-pioglitazone
Frequently asked questions
Can I take Glimepiride-pioglitazone with Sulfadiazine?
MediHelp rates the interaction as moderate. Glimepiride-pioglitazone and Sulfadiazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Sulfonamide antibiotics can potentiate the glucose-lowering action of sulfonylureas such as glimepiride, leading to hypoglycemia. The effect is most relevant in older patients and in those with renal or hepatic impairment.
How serious is the interaction between Glimepiride-pioglitazone and Sulfadiazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose closely when starting or stopping sulfadiazine and counsel the patient on hypoglycemia symptoms. Reduce the glimepiride dose if hypoglycemia occurs.
What other medicines interact with Glimepiride-pioglitazone?
MediHelp also lists interactions of Glimepiride-pioglitazone with, for example, Fluconazole, Gemfibrozil, Insulin aspart. The full list is on the Glimepiride-pioglitazone page.
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