What it is used for
- Type 2 diabetes (to reduce the rise in blood sugar after meals, often with other treatments)
How it works
Acarbose slows the breakdown and absorption of carbohydrates in the gut, which blunts the spike in blood sugar that normally follows a meal.
How it is taken
Available as tablets taken by mouth, usually with the first bite of a meal. Take it exactly as your doctor, pharmacist, or the label directs; it works best when taken at the start of carbohydrate-containing meals.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Wind (flatulence) and bloating
- Abdominal discomfort or cramps
- Diarrhoea
- Symptoms often ease as the body adjusts
Serious effects — get help
- Signs of liver problems (yellow skin or eyes, dark urine, persistent nausea) — see your doctor
- Severe or persistent abdominal pain or bowel symptoms
- Serious allergic reaction (uncommon)
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Other diabetes medicines and insulin (added low-blood-sugar risk)
- Some digestive enzyme supplements may reduce its effect
- Certain medicines for stomach or bowel conditions
- Check all medicines with your pharmacist
Who should take care
- If you have low blood sugar while on acarbose plus another diabetes drug, use glucose (not ordinary table sugar), as acarbose slows the breakdown of normal sugar
- Avoided in some bowel conditions such as inflammatory bowel disease or obstruction
- Use with caution in liver problems; liver checks may be advised
- Discuss pregnancy and breastfeeding with your clinician
- Introduce slowly to reduce gut side effects, as your doctor directs