Drug interactions
Chlorothiazide + Metformin-sitagliptin
Severity: Minor
Chlorothiazide and Metformin-sitagliptin: minor 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
Chlorothiazide may raise blood glucose and blunt the effect of glucose-lowering drugs, especially at higher doses. The effect is usually modest and manageable.
What this interaction means in plain words
Chlorothiazide and Metformin-sitagliptin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chlorothiazide belongs to Cardiovascular; Metformin-sitagliptin belongs to Endocrine.
Why it happens
Thiazide-induced hypokalemia and reduced insulin secretion and glucose utilization antagonize antidiabetic effects.
What to do
Monitor glucose and HbA1c after starting or changing the thiazide, and correct low potassium. Adjust the antidiabetic regimen if control worsens.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Metformin-sitagliptin
Other interactions of Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Metformin-sitagliptin?
MediHelp rates the interaction as minor. Chlorothiazide and Metformin-sitagliptin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Chlorothiazide may raise blood glucose and blunt the effect of glucose-lowering drugs, especially at higher doses. The effect is usually modest and manageable.
How serious is the interaction between Chlorothiazide and Metformin-sitagliptin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor glucose and HbA1c after starting or changing the thiazide, and correct low potassium. Adjust the antidiabetic regimen if control worsens.
What other medicines interact with Metformin-sitagliptin?
MediHelp also lists interactions of Metformin-sitagliptin with, for example, Clozapine, Contrast media, Diatrizoate meglumine / diatrizoate. The full list is on the Metformin-sitagliptin page.
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