Drug interactions
Chlorthalidone + Metformin-repaglinide
Severity: Moderate
Chlorthalidone and Metformin-repaglinide: 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-type diuretics can raise blood glucose, mainly through potassium loss and reduced insulin secretion, and may reduce the effect of antidiabetic drugs. Chlorthalidone may therefore blunt glycemic control in patients on metformin and repaglinide.
What this interaction means in plain words
Chlorthalidone and Metformin-repaglinide 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.
Chlorthalidone belongs to Cardiovascular; Metformin-repaglinide belongs to Endocrine.
Why it happens
Pharmacodynamic antagonism through thiazide-induced hypokalemia, reduced insulin release and decreased insulin sensitivity.
What to do
Monitor blood glucose and electrolytes, especially potassium, after starting or changing the dose of chlorthalidone. Adjust antidiabetic therapy if control worsens.
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 Metformin-repaglinide
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Metformin-repaglinide?
MediHelp rates the interaction as moderate. Chlorthalidone and Metformin-repaglinide 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-type diuretics can raise blood glucose, mainly through potassium loss and reduced insulin secretion, and may reduce the effect of antidiabetic drugs. Chlorthalidone may therefore blunt glycemic control in patients on metformin and repaglinide.
How serious is the interaction between Chlorthalidone and Metformin-repaglinide?
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 electrolytes, especially potassium, after starting or changing the dose of chlorthalidone. Adjust antidiabetic therapy if control worsens.
What other medicines interact with Metformin-repaglinide?
MediHelp also lists interactions of Metformin-repaglinide with, for example, Gemfibrozil, Apalutamide, Clarithromycin. The full list is on the Metformin-repaglinide page.
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