Drug interactions
Chlorothiazide + Insulin aspart
Severity: Minor
Chlorothiazide and Insulin aspart: 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 can raise blood glucose and reduce the effect of insulin. Diabetes control may worsen, especially at higher doses.
What this interaction means in plain words
Chlorothiazide and Insulin aspart 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; Insulin aspart belongs to Endocrine.
Why it happens
Thiazides reduce insulin secretion and sensitivity, partly through potassium depletion, opposing insulin action.
What to do
Monitor blood glucose and potassium after starting chlorothiazide and increase insulin if needed.
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 Insulin aspart
Other interactions of Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Insulin aspart?
MediHelp rates the interaction as minor. Chlorothiazide and Insulin aspart 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 can raise blood glucose and reduce the effect of insulin. Diabetes control may worsen, especially at higher doses.
How serious is the interaction between Chlorothiazide and Insulin aspart?
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 potassium after starting chlorothiazide and increase insulin if needed.
What other medicines interact with Insulin aspart?
MediHelp also lists interactions of Insulin aspart with, for example, Alogliptin-pioglitazone, Ethanol, Glimepiride-pioglitazone. The full list is on the Insulin aspart page.
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