acarbose vs miglitol
Side-by-side comparison of acarbose and miglitol Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Acarbose is a medicine that helps lower blood sugar levels in people with type 2 diabetes. It works best when used with diet and exercise.
Miglitol (Glyset) helps control blood sugar in adults with type 2 diabetes. It should be used with diet and exercise.
Acarbose is used to help control blood sugar in adults with type 2 diabetes. You should use it along with a healthy diet and regular exercise. This medicine helps to keep your blood sugar from getting too high after you eat.
Miglitol treats type 2 diabetes. It helps lower your blood sugar levels after meals. You should use it along with a healthy diet and regular exercise to manage your diabetes.
Acarbose slows down the digestion of carbohydrates (sugars and starches) in your body. It does this by blocking certain enzymes in your small intestine that break down carbs. This helps to prevent a sharp rise in blood sugar after meals.
Miglitol slows down the digestion of carbohydrates. This helps to prevent a large rise in blood sugar after you eat. It works in your gut to block certain enzymes.
- • Gas
- • Diarrhea
- • Abdominal pain
- • Gas
- • Diarrhea
- • Abdominal pain
- Low blood sugar 269
- Feeling sick to your stomach 203
- High blood sugar 200
- Feeling lightheaded 160
- Loose, watery stools 147
- Low blood sugar 67
- Abnormal liver function 46
- Reduced appetite 39
- Diarrhea 37
- Kidney problems 37
You should not take acarbose if you have diabetic ketoacidosis or cirrhosis. Also, do not take it if you have inflammatory bowel disease, colon ulcers, or any bowel obstruction. This medicine can cause liver problems in some people. Tell your doctor right away if you develop symptoms like yellowing of the skin or eyes.
There are no boxed warnings provided in the source data.
Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if acarbose will harm your unborn baby. Talk to your doctor if you are breastfeeding or plan to breastfeed. It is not known if acarbose passes into breast milk.
There is not enough information about the safety of miglitol during pregnancy or breastfeeding. Talk to your doctor if you are pregnant, plan to become pregnant, or are breastfeeding.
How to Read This acarbose vs miglitol Comparison
acarbose is classified in the Alpha-Glucosidase Inhibitor drug class, while miglitol sits within the Alpha-Glucosidase Inhibitor class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, acarbose has 979 submissions while miglitol has 226. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between acarbose and miglitol — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.