Drug interactions
Hydrochlorothiazide + Metformin-sitagliptin
Severity: Minor
Hydrochlorothiazide 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
Thiazide diuretics can raise blood glucose and so reduce the effect of antidiabetic drugs. Hydrochlorothiazide may also slightly increase metformin exposure, and volume depletion may affect renal function.
What this interaction means in plain words
Hydrochlorothiazide 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.
Hydrochlorothiazide belongs to Cardiovascular; Metformin-sitagliptin belongs to Endocrine.
Why it happens
Thiazides impair glucose tolerance (via potassium loss and reduced insulin secretion and sensitivity), and may compete for renal tubular secretion of metformin.
What to do
Monitor blood glucose and renal function when starting or adjusting hydrochlorothiazide, and adjust antidiabetic therapy 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 Hydrochlorothiazide
Frequently asked questions
Can I take Hydrochlorothiazide with Metformin-sitagliptin?
MediHelp rates the interaction as minor. Hydrochlorothiazide 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. Thiazide diuretics can raise blood glucose and so reduce the effect of antidiabetic drugs. Hydrochlorothiazide may also slightly increase metformin exposure, and volume depletion may affect renal function.
How serious is the interaction between Hydrochlorothiazide 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 blood glucose and renal function when starting or adjusting hydrochlorothiazide, and adjust antidiabetic therapy 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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