Drug interactions
Insulin degludec / insulin aspart + Metolazone
Severity: Moderate
Insulin degludec / insulin aspart and Metolazone: 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
Metolazone can raise blood glucose and reduce insulin sensitivity, so insulin requirements may increase. Diuretic-induced hypokalemia may contribute to the hyperglycemia.
What this interaction means in plain words
Insulin degludec / insulin aspart and Metolazone 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.
Why it happens
Thiazide-like diuretics reduce insulin sensitivity and secretion, partly via potassium depletion, opposing insulin action.
What to do
Monitor blood glucose more often when metolazone is started or its dose changed, and adjust insulin dose; keep potassium in the normal range.
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 Metolazone
Frequently asked questions
Can I take Insulin degludec / insulin aspart with Metolazone?
MediHelp rates the interaction as moderate. Insulin degludec / insulin aspart and Metolazone 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. Metolazone can raise blood glucose and reduce insulin sensitivity, so insulin requirements may increase. Diuretic-induced hypokalemia may contribute to the hyperglycemia.
How serious is the interaction between Insulin degludec / insulin aspart and Metolazone?
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 more often when metolazone is started or its dose changed, and adjust insulin dose; keep potassium in the normal range.
What other medicines interact with Metolazone?
MediHelp also lists interactions of Metolazone with, for example, Amifostine, Amlodipine-hydrochlorothiazide-valsartan, Amlodipine-olmesartan-hydrochlorothiazide. The full list is on the Metolazone page.
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