Drug interactions
Insulin aspart-insulin aspart protamine + Metformin
Severity: Moderate
Insulin aspart-insulin aspart protamine and Metformin: 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
Metformin and insulin are frequently combined and have complementary effects, but together they can cause hypoglycemia. Insulin doses may need reduction when metformin is added.
What this interaction means in plain words
Insulin aspart-insulin aspart protamine and Metformin 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.
Insulin aspart-insulin aspart protamine belongs to Endocrine; Metformin belongs to Endocrine.
Why it happens
Additive glucose lowering: metformin reduces hepatic glucose output and improves insulin sensitivity while insulin directly promotes glucose disposal.
What to do
Monitor blood glucose when starting or stopping metformin. Reduce the insulin dose if hypoglycemia occurs.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Insulin aspart-insulin aspart protamine and Metformin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Insulin aspart-insulin aspart protamine
- Ethanol + Insulin aspart-insulin aspart protamine Major
- Insulin aspart-insulin aspart protamine + Pentamidine Major
- Insulin aspart-insulin aspart protamine + Pioglitazone Major
- Insulin aspart-insulin aspart protamine + Rosiglitazone Major
- Acarbose + Insulin aspart-insulin aspart protamine Moderate
- Albiglutide + Insulin aspart-insulin aspart protamine Moderate
Other interactions of Metformin
Frequently asked questions
Can I take Insulin aspart-insulin aspart protamine with Metformin?
MediHelp rates the interaction as moderate. Insulin aspart-insulin aspart protamine and Metformin 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. Metformin and insulin are frequently combined and have complementary effects, but together they can cause hypoglycemia. Insulin doses may need reduction when metformin is added.
How serious is the interaction between Insulin aspart-insulin aspart protamine and Metformin?
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 when starting or stopping metformin. Reduce the insulin dose if hypoglycemia occurs.
What other medicines interact with Insulin aspart-insulin aspart protamine?
MediHelp also lists interactions of Insulin aspart-insulin aspart protamine with, for example, Ethanol, Pentamidine, Pioglitazone. The full list is on the Insulin aspart-insulin aspart protamine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
