5 Acarbose Side Effects and How to Manage Them
Acarbose is a medication for Type 2 diabetes. It may cause diarrhea, abdominal pain, and gas in some people. Learn more about acarbose side effects at GoodRx.
acarbose
Used for Diabetes Type 2
Used for Diabetes Type 2
Acarbose is a medication that's used together with a healthy diet and exercise to help control blood sugar in adults with Type 2 diabetes. It isn't as commonly used as other diabetes medications since it can lead to some unpleasant side effects like gas and diarrhea. But acarbose is less likely to cause hypoglycemia compared to other diabetes medications when used on its own. This medication is only available as the generic name acarbose since the brand name Precose has been discontinued.
What is Acarbose?
What is Acarbose used for?
- Type 2 diabetes
How Acarbose works
Acarbose is an alpha-glucosidase inhibitor. It temporarily blocks a protein called alpha-glucosidase, which slows down the digestion of carbohydrates in your gut. As a result, your body will absorb less sugar from the foods that you eat. And this leads to lower blood sugar levels after you eat.
Drug facts
| Common Brands | Precose |
|---|---|
| Drug Class | Alpha-glucosidase inhibitor |
| Controlled Substance Classification | Not a controlled medication |
| Generic Status | Lower-cost generic available |
| Availability | Prescription only |
Side effects of Acarbose
The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Excessive gas (74%)
- Diarrhea (31%)
- Stomach pain (19%)
Less Common Side Effects
- Rash
- Skin redness
- Itching
- Swelling
More on Acarbose side effects
The following Acarbose side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor as soon as possible if any of the following side effects occur:
Rare
Yellow eyes or skin
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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Pros and cons of Acarbose
Pros
- Not likely to cause weight gain, instead it might cause weight loss
- Helps control blood sugar levels after you're eating
- Low risk of low blood sugar when used alone
- Can be used with other diabetes medications
- Available as a lower-cost generic
Cons
- Must be taken multiple times a day
- Needs to be taken with meals
- Side effects include excessive gas and diarrhea
- Not recommended for people with severe kidney problems
- Typically not considered a first-choice treatment option
Pharmacist tips for Acarbose
- Take acarbose with the first bite of each main meal so it can work properly.
- If you're taking acarbose with other medications that can cause low blood sugar (e.g., insulin, sulfonylureas), carry glucose tablets with you at all times so that you can take them if your blood sugar drops. Products with sucrose, another form of sugar, might not work well to raise your blood sugar because acarbose will delay their digestion.
- It's common to experience stomach side effects during the first few weeks of treatment with acarbose. These include stomach pain, excessive gas, and diarrhea. They should become less bothersome with time.
- Talk to your provider before taking over-the-counter (OTC) products like Beano to help with gas. Some products contain alpha-glucosidase, the protein that acarbose blocks. If you take both, acarbose might not work as well at lowering your blood sugar.
- Before making any changes to your medications, talk with your provider first. Certain medications (e.g., thiazides, corticosteroids, estrogens) have the potential to raise your blood sugar levels, and stopping them suddenly while taking acarbose could lead to low blood sugar levels.
Risks and warnings for Acarbose
Acarbose can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Low blood sugar when taken together with other diabetes medications
- Risk factors: Using insulin or sulfonylureas
When acarbose is used together with insulin or a sulfonylurea, your blood sugar can drop too low, which can be life-threatening. Signs of low blood sugar include fast heartbeat, sweating, pale skin, shakiness, confusion, and irritability. Make sure to carry glucose tablets at all times while you're on this medication, because products with sucrose (another form of sugar) won't work fast enough to raise your blood sugar.
Changes in liver labs
- Risk factors: Higher dose of medication | Women
In clinical trials, some people taking acarbose had changes in their liver labs. But these changes returned to normal after the medication was stopped. This is usually only seen when lab work is ordered. Make sure to get regular lab work done when your provider orders it. If you experience nausea, stomach pain, clay-colored stools, or yellowing of your skin or whites of your eyes, seek medical attention right away. These could be signs of liver problems.
Losing control of blood sugar
- Risk factors: Stress such as fever, trauma, infection, or surgery
Over time, acarbose might stop lowering your blood sugar. Sometimes this happens when your body is under stress. If this happens, you might need to stop acarbose and switch to insulin. Talk to your provider about how often you should check your blood sugar levels, and make sure to attend all of your follow-up appointments.
Acarbose dosage
The average cost for 90 tablets of 50mg of Acarbose is $25.17 with a free GoodRx coupon. This is 54.92% off the average retail price of $55.83. 
Tablet
Tablet| Dosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
| 25mg | 90 tablets | $23.85 | $0.27 |
| 50mg | 90 tablets | $25.17 | $0.28 |
| 100mg | 90 tablets | $34.13 | $0.38 |
Typical dosage for Acarbose
-
Starting dose: The typical starting dose is 25 mg three times daily by mouth taken with the first bite with each main meal.
-
Maintenance dose: The typical maintenance dose is 50 mg to 100 mg three times daily by mouth taken with the first bite with each main meal.
Your provider will adjust your dose based on whether you're having side effects and how well the medication is working to control your blood sugar levels.
Interactions between Acarbose and other drugs
Acarbose may interact with certain medications or supplements. Always let your doctor and pharmacist know about any other medications or supplements (including prescribed and over-the-counter medications, vitamins, and dietary or herbal supplements) that you are currently taking. The list below does not include all possible drug interactions with Acarbose. Please note that only the generic name of each medication is listed below.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Acetohexamide
- Aspirin
- Balofloxacin
- Besifloxacin
- Chloroquine
- Chlorpropamide
- Ciprofloxacin
- Digoxin
- Enoxacin
- Fleroxacin
- Flumequine
- Gatifloxacin
- Gemifloxacin
- Gliclazide
- Glipizide
- Glyburide
- Hydroxychloroquine
- Lanreotide
- Levofloxacin
- Lomefloxacin
- Moxifloxacin
- Nadifloxacin
- Norfloxacin
- Octreotide
- Ofloxacin
- Pasireotide
- Pazufloxacin
- Pefloxacin
- Pioglitazone
- Prulifloxacin
- Rufloxacin
- Sitagliptin
- Sparfloxacin
- Thioctic Acid
- Tolazamide
- Tolbutamide
- Tosufloxacin
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Acebutolol
- Atenolol
- Betaxolol
- Bisoprolol
- Bitter Melon
- Carteolol
- Carvedilol
- Celiprolol
- Esmolol
- Fenugreek
- Furazolidone
- Glucomannan
- Guar Gum
- Iproniazid
- Isocarboxazid
- Labetalol
- Levobunolol
- Linezolid
- Methylene Blue
- Metipranolol
- Metoprolol
- Moclobemide
- Nadolol
- Nebivolol
- Nialamide
- Oxprenolol
- Penbutolol
- Phenelzine
- Pindolol
- Practolol
- Procarbazine
- Propranolol
- Psyllium
- Rasagiline
- Safinamide
- Selegiline
- Sotalol
- Timolol
- Tranylcypromine
- Warfarin
How much does Acarbose cost?
To access savings, use a GoodRx coupon and pay just a fraction of the retail price.
Acarbose contraindications
Contraindications are specific health conditions or situations in which a person should not take a medication due to safety concerns. If you have any of the following conditions or if any of the following apply to you, let your healthcare provider know because Acarbose will not be safe for you to take.
- Diabetic ketoacidosis
- Cirrhosis (liver damage)
- Inflammatory bowel disease
- Ulcers in the colon
- Blockage in your gut
- Gut problems associated with digestion or absorption issues
- Conditions that worsen due to excessive gas in the gut
What are alternatives to Acarbose?
There are a number of medications that your doctor can prescribe in place of Acarbose. Compare a few possible alternatives below.
News about Acarbose
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