Drug interactions
Glimepiride + Methyclothiazide
Severity: Moderate
Glimepiride and Methyclothiazide: 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
Thiazide diuretics can raise blood glucose and reduce glycemic control in patients treated with sulfonylureas. The effect is usually modest at low diuretic doses but may require adjustment of antidiabetic therapy.
What this interaction means in plain words
Glimepiride and Methyclothiazide 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
Thiazides cause potassium depletion and reduced insulin secretion and may increase insulin resistance, opposing the glucose-lowering effect of glimepiride.
What to do
Monitor blood glucose and HbA1c when starting, stopping or changing the thiazide dose. Increase the glimepiride dose if needed and correct hypokalemia.
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
Frequently asked questions
Can I take Glimepiride with Methyclothiazide?
MediHelp rates the interaction as moderate. Glimepiride and Methyclothiazide 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. Thiazide diuretics can raise blood glucose and reduce glycemic control in patients treated with sulfonylureas. The effect is usually modest at low diuretic doses but may require adjustment of antidiabetic therapy.
How serious is the interaction between Glimepiride and Methyclothiazide?
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 and HbA1c when starting, stopping or changing the thiazide dose. Increase the glimepiride dose if needed and correct hypokalemia.
What other medicines interact with Glimepiride?
MediHelp also lists interactions of Glimepiride with, for example, Fluconazole, Insulin degludec-liraglutide, Insulin glargine-lixisenatide. The full list is on the Glimepiride page.
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