Home > Patients & Visitors > Health Library > Alpha-Glucosidase Inhibitors for Type 2 Diabetes
and miglitol help keep blood sugar levels within a
target range by slowing the digestion of complex carbohydrates, also called starches. Complex carbohydrates include foods like bread, cereal, grain, pasta, rice, flour, beans, and vegetables like potatoes and corn. These medicines do not change the effect that simple sugars have on blood sugar. Simple sugars include foods like fruit, juice, milk, honey, desserts, and candy.
The medicine is taken with the first bite of food. These medicines do not cause the
pancreas to produce more insulin. They will not cause
low blood sugar (hypoglycemia) unless they are used with other
oral medicines for diabetes or with
Alpha-glucosidase inhibitors help people with
type 2 diabetes whose blood sugar is highest after eating complex carbohydrates.
The medicine may be used alone, with another medicine for diabetes,
or with insulin.
Type 2 diabetes is a disease that can get worse over time, so medicines may need to change. Diabetes medicines work best for people who are being active and eating healthy foods.
When taken with the first bite of food, these medicines have been found
to lower blood sugar levels
in people who have high blood sugar after eating (postprandial hyperglycemia). Studies have suggested that alpha-glucosidase inhibitors lower hemoglobin A1c by 0.5% to 0.8%.footnote 1
All medicines have side effects. But many people don't feel the side effects, or they are able to deal with them. Ask your pharmacist about the side effects of each medicine you take. Side effects are also listed in the information that comes with your medicine.
Here are some important things to think about:
Call 911 or other emergency services right away if you have:
Call your doctor if you have:
Common side effects of this medicine include:
See Drug Reference for
a full list of side effects. (Drug Reference is not available in all
These medicines do not cause
low blood sugar or weight gain, but you might have low blood sugar if you don't eat or if you exercise, drink alcohol, or use another medicine that causes low blood sugar. When taking this medicine, low blood sugar can be treated with quick-sugar foods except table sugar or regular soda pop, which will not work.
If you pass a lot of gas while taking this medicine, your doctor may suggest a lower dose and then increase the dose slowly. Eating a lower-carbohydrate diet can also help. If you have problems with your digestive system, you might not be able to take this medicine.
Medicine is one of the many tools your doctor has to treat a health problem. Taking medicine as your doctor suggests will improve your health and may prevent future problems. If you don't take your medicines properly, you may be putting your health (and perhaps your life) at risk.
There are many reasons why people have trouble taking their medicine. But in most cases, there is something you can do. For suggestions on how to work around common problems, see the topic Taking Medicines as Prescribed.
If you are pregnant, breastfeeding, or planning to get pregnant, do not use any medicines unless your doctor tells you to. Some medicines can harm your baby. This includes prescription and over-the-counter medicines, vitamins, herbs, and supplements. And make sure that all your doctors know that you are pregnant, breastfeeding, or planning to get pregnant.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Complete the new medication information form (PDF)(What is a PDF document?) to help you understand this medication.
Inzucchi SE, et al. (2012). Management of hyperglycemia in type 2 diabetes: A patient-centered approach. Diabetes Care, 35(6): 1364–1379.
ByHealthwise StaffPrimary Medical ReviewerE. Gregory Thompson, MD - Internal MedicineSpecialist Medical ReviewerDavid C.W. Lau, MD, PhD, FRCPC - Endocrinology
Current as ofMay 23, 2016
Current as of:
May 23, 2016
E. Gregory Thompson, MD - Internal Medicine & David C.W. Lau, MD, PhD, FRCPC - Endocrinology
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