Drug interactions
Hydrochlorothiazide + Metformin-pioglitazone
Severity: Moderate
Hydrochlorothiazide and Metformin-pioglitazone: 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
Thiazides can worsen glucose tolerance and thus oppose the effect of metformin and pioglitazone. Hydrochlorothiazide may also slightly raise metformin levels. Overall the combination is common and usually manageable.
What this interaction means in plain words
Hydrochlorothiazide and Metformin-pioglitazone 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.
Hydrochlorothiazide belongs to Cardiovascular; Metformin-pioglitazone belongs to Endocrine.
Why it happens
Thiazide-induced hypokalemia and reduced insulin sensitivity raise blood glucose, with possible minor competition for renal tubular secretion of metformin.
What to do
Monitor blood glucose and electrolytes, and adjust antidiabetic therapy if control deteriorates.
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-pioglitazone
Other interactions of Hydrochlorothiazide
Frequently asked questions
Can I take Hydrochlorothiazide with Metformin-pioglitazone?
MediHelp rates the interaction as moderate. Hydrochlorothiazide and Metformin-pioglitazone 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. Thiazides can worsen glucose tolerance and thus oppose the effect of metformin and pioglitazone. Hydrochlorothiazide may also slightly raise metformin levels. Overall the combination is common and usually manageable.
How serious is the interaction between Hydrochlorothiazide and Metformin-pioglitazone?
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, and adjust antidiabetic therapy if control deteriorates.
What other medicines interact with Metformin-pioglitazone?
MediHelp also lists interactions of Metformin-pioglitazone with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Metformin-pioglitazone page.
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