Drug interactions
Hydrochlorothiazide + Insulin lispro
Severity: Minor
Hydrochlorothiazide and Insulin lispro: 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 partly offset the glucose-lowering effect of insulin. Mealtime insulin requirements may rise, particularly with higher thiazide doses.
What this interaction means in plain words
Hydrochlorothiazide and Insulin lispro 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; Insulin lispro belongs to Endocrine.
Why it happens
Thiazide-induced hypokalemia and reduced insulin secretion and peripheral insulin sensitivity oppose the action of insulin (pharmacodynamic antagonism).
What to do
Monitor blood glucose when the hydrochlorothiazide is started, stopped or changed and adjust the insulin dose as needed. Check serum potassium periodically.
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 Hydrochlorothiazide
Other interactions of Insulin lispro
Frequently asked questions
Can I take Hydrochlorothiazide with Insulin lispro?
MediHelp rates the interaction as minor. Hydrochlorothiazide and Insulin lispro 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 partly offset the glucose-lowering effect of insulin. Mealtime insulin requirements may rise, particularly with higher thiazide doses.
How serious is the interaction between Hydrochlorothiazide and Insulin lispro?
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 when the hydrochlorothiazide is started, stopped or changed and adjust the insulin dose as needed. Check serum potassium periodically.
What other medicines interact with Hydrochlorothiazide?
MediHelp also lists interactions of Hydrochlorothiazide with, for example, Dofetilide, Amifostine, Amiodarone. The full list is on the Hydrochlorothiazide page.
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