Insulin Degludec and Acarbose: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 10, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acarbose
Insulin Degludec
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Both of these medicines lower your blood sugar, just in different ways. Insulin degludec (Tresiba) is a long-acting insulin, and acarbose (Precose) slows how fast your body absorbs sugar from food. When you take them together, their effects add up, so your blood sugar could drop too low. That is called hypoglycemia, and it can cause shakiness, sweating, dizziness, or confusion.
The good news is this is very manageable. Your care team may adjust your insulin dose and keep a closer eye on your numbers. One helpful tip: because acarbose slows sugar absorption, if you do have a low, use glucose (dextrose) tablets rather than table sugar. Keep taking both as prescribed and talk with your pharmacist or doctor.
Effect: Additive glucose-lowering, increasing hypoglycemia risk. Neither agent is a prodrug; this is a pharmacodynamic (not metabolic) interaction.
- Mechanism: Acarbose (alpha-glucosidase inhibitor) delays carbohydrate absorption while insulin degludec provides basal glycemic control; effects are additive.
- Direction/magnitude: Enhanced hypoglycemic effect; magnitude not quantified.
- Onset: Unspecified.
- Evidence: Theoretical, but severity rated major given NTI-like consequences of severe hypoglycemia.
- Management: A downward insulin dose adjustment may be needed. Monitor blood glucose more frequently. Treat any hypoglycemia with oral glucose/dextrose, not sucrose, as acarbose blunts sucrose breakdown.
What happens
An increased risk of hypoglycemia
Interaction Deep Dive
Using oral antidiabetic drugs together with insulin1 or pramlintide2 can modify glucose metabolism, potentially raising the likelihood of hypoglycemia. A reduction in the insulin dose may be required when it is given alongside oral antidiabetic agents3.
Why it happens (mechanism)
Altered glucose metabolism; additive hypoglycemia
How to manage this interaction
This combination is commonly used on purpose, but because both lower blood sugar, the two together raise the chance of a low.
- Keep taking both as prescribed unless your prescriber tells you otherwise.
- Your care team may lower your insulin dose and monitor your blood sugar more closely, individualized to you.
- Learn the signs of a low (shaky, sweaty, dizzy, confused).
- Important: if you have a low while on acarbose, treat it with glucose or dextrose tablets, not regular table sugar, since acarbose slows how sugar breaks down.
- Ask your pharmacist or doctor about a home glucose plan and how to handle lows.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Insulin Degludec and Acarbose together?
Acarbose and insulin degludec both lower blood sugar, so together they raise your risk of hypoglycemia; your team may lower the insulin dose and watch your levels, and you should treat any low with glucose tablets rather than table sugar. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Insulin Degludec and Acarbose interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Insulin Degludec and Acarbose interaction managed?
This combination is commonly used on purpose, but because both lower blood sugar, the two together raise the chance of a low. Keep taking both as prescribed unless your prescriber tells you otherwise. Your care team may lower your insulin dose and monitor your blood sugar more closely, individualized to you. Learn the signs of a low (shaky, sweaty, dizzy, confused). Important: if you have a low wh… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Insulin Degludec or Acarbose need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (3)
- Product Information: Tresiba subcutaneous injection solution, insulin degludec subcutaneous injection solution. Novo Nordisk A/S (per EMA), Bagsvaerd, Denmark, 2013. DailyMed
- Product Information: SYMLIN(R) subcutaneous injection, pramlintide acetate subcutaneous injection. AstraZeneca Pharmaceuticals LP (per manufacturer), Wilmington, DE, 2016. DailyMed
- Product Information: GLYXAMBI(R) oral tablets, empagliflozin linagliptin oral tablets. Boehringer Ingelheim Pharmaceuticals Inc (per manufacturer), Ridgefield, CT, 2019. DailyMed
Keep reading about Acarbose
Keep reading about Insulin Degludec
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
Check another combination
Our instant two-drug interaction checker is almost here.
Still have questions about this combination?
Every question gets a real answer from a licensed pharmacist — free, and usually within a day.
Ask the pharmacist