Drug interactions
Chlorthalidone + Pioglitazone
Severity: Moderate
Chlorthalidone and 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
Chlorthalidone can raise blood glucose and so reduce the effect of pioglitazone. Glycemic control may worsen in diabetic patients.
What this interaction means in plain words
Chlorthalidone and 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.
Chlorthalidone belongs to Cardiovascular; Pioglitazone belongs to Endocrine.
Why it happens
Thiazide-induced hypokalemia and impaired glucose tolerance oppose the insulin-sensitizing effect.
What to do
Monitor blood glucose and HbA1c after starting or changing chlorthalidone and adjust therapy as needed.
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 Chlorthalidone
Other interactions of Pioglitazone
Frequently asked questions
Can I take Chlorthalidone with Pioglitazone?
MediHelp rates the interaction as moderate. Chlorthalidone and 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. Chlorthalidone can raise blood glucose and so reduce the effect of pioglitazone. Glycemic control may worsen in diabetic patients.
How serious is the interaction between Chlorthalidone and 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 HbA1c after starting or changing chlorthalidone and adjust therapy as needed.
What other medicines interact with Chlorthalidone?
MediHelp also lists interactions of Chlorthalidone with, for example, Amifostine, Atenolol-chlorthalidone, Candesartan-hydrochlorothiazide. The full list is on the Chlorthalidone page.
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