Medically reviewed on March 25, 2018
(MIG li tol)
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Glyset: 25 mg, 50 mg, 100 mg
Generic: 25 mg, 50 mg, 100 mg
Brand Names: U.S.
- Antidiabetic Agent, Alpha-Glucosidase Inhibitor
In contrast to sulfonylureas, miglitol does not enhance insulin secretion; the antihyperglycemic action of miglitol results from a reversible inhibition of membrane-bound intestinal alpha-glucosidases which hydrolyze oligosaccharides and disaccharides to glucose and other monosaccharides in the brush border of the small intestine. In patients with diabetes, this enzyme inhibition results in delayed glucose absorption and lowering of postprandial hyperglycemia.
Saturable at high doses: 25 mg dose: Completely absorbed; 100 mg dose: 50% to 70% absorbed
Vd: 0.18 L/kg
Urine (as unchanged drug)
Time to Peak
Special Populations: Renal Function Impairment
Because miglitol is excreted primarily by the kidneys, accumulation is expected. However, dosage adjustment to correct the increased plasma concentrations is not feasible because miglitol acts locally.
Use: Labeled Indications
Diabetes mellitus, type 2 (noninsulin-dependent, NIDDM): Adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus
Hypersensitivity to miglitol or any of component of the formulation; diabetic ketoacidosis; inflammatory bowel disease; colonic ulceration; partial intestinal obstruction or predisposition to intestinal obstruction; chronic intestinal diseases associated with marked disorders of digestion or absorption or with conditions that may deteriorate as a result of increased gas formation in the intestine
Diabetes mellitus, type 2: Oral: Initial: 25 mg 3 times daily at the start of each meal or may consider 25 mg once daily with gradual titration to 25 mg 3 times daily to minimize GI intolerance. After 4 to 8 weeks dose should be titrated to maintenance dose of 50 mg 3 times daily and continue for ~3 months; if glycosylated hemoglobin is not satisfactory, may further increase to maximum recommended dose: 100 mg 3 times daily. As tolerated, the lowest effective dose should be maintained.
Concomitant use with insulin and/or insulin secretagogues (eg, sulfonylurea): Reduced dose of insulin and/or insulin secretagogues may be needed.
Refer to adult dosing.
Dosing: Renal Impairment
CrCl ≥25 mL/minute: No dosage adjustment necessary. Although miglitol is primarily excreted unchanged, the increased plasma levels in renal impairment are not expected to affect efficacy (clinical response is localized to the GI tract); however, the effects on adverse effects are unknown.
CrCl <25 mL/minute or SCr >2 mg/dL: Use not recommended (not adequately studied).
Dosing: Hepatic Impairment
No dosage adjustment necessary.
Administer orally at the start of each main meal.
Store at 25°C (77°F); excursions permitted to 15°C to 30°C (59°F to 86°F).
Alpha-Lipoic Acid: May enhance the hypoglycemic effect of Antidiabetic Agents. Monitor therapy
Androgens: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Exceptions: Danazol. Monitor therapy
Guanethidine: May enhance the hypoglycemic effect of Antidiabetic Agents. Monitor therapy
Hyperglycemia-Associated Agents: May diminish the therapeutic effect of Antidiabetic Agents. Monitor therapy
Hypoglycemia-Associated Agents: Antidiabetic Agents may enhance the hypoglycemic effect of Hypoglycemia-Associated Agents. Monitor therapy
Monoamine Oxidase Inhibitors: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Monitor therapy
Pegvisomant: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Monitor therapy
Prothionamide: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Monitor therapy
Quinolones: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Quinolones may diminish the therapeutic effect of Blood Glucose Lowering Agents. Specifically, if an agent is being used to treat diabetes, loss of blood sugar control may occur with quinolone use. Monitor therapy
Ritodrine: May diminish the therapeutic effect of Antidiabetic Agents. Monitor therapy
Salicylates: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Monitor therapy
Selective Serotonin Reuptake Inhibitors: May enhance the hypoglycemic effect of Blood Glucose Lowering Agents. Monitor therapy
Thiazide and Thiazide-Like Diuretics: May diminish the therapeutic effect of Antidiabetic Agents. Monitor therapy
>10%: Gastrointestinal: Flatulence (42%), diarrhea (29%), abdominal pain (12%)
1% to 10%: Dermatologic: Skin rash (4%)
<1%, postmarketing, and/or case reports: Abdominal distention, gastrointestinal pain, intestinal obstruction, nausea, paralytic ileus, pneumatosis cystoides intestinalis
Concerns related to adverse effects:
• GI symptoms: Most common reactions are gastrointestinal related; incidence of abdominal pain and diarrhea tend to diminish considerably with continued treatment.
• Hypoglycemia: Hypoglycemia is unlikely to occur with miglitol monotherapy but may occur with combination therapy (eg, sulfonylurea, insulin). In patients taking miglitol, oral glucose (dextrose) should be used instead of sucrose (cane sugar) in the treatment of mild-to-moderate hypoglycemia since the hydrolysis of sucrose to glucose and fructose is inhibited by miglitol. Correction of severe hypoglycemia may require the use of either glucagon or IV glucose.
• Renal impairment: Not recommended in severe impairment (serum creatinine >2 mg/dL or CrCl <25 mL/minute).
• Stress-related states: It may be necessary to discontinue miglitol and administer insulin if the patient is exposed to stress (ie, fever, trauma, infection, surgery).
Concurrent drug therapy issues:
• Drug-drug interactions: Potentially significant interactions may exist, requiring dose or frequency adjustment, additional monitoring, and/or selection of alternative therapy. Consult drug interactions database for more detailed information.
Monitor therapeutic response by periodic blood glucose tests; hemoglobin A1c (at least twice yearly in patients who have stable glycemic control and are meeting treatment goals; quarterly in patients not meeting treatment goals or with therapy change [ADA 2018a]).
Adverse events have not been reported in animal reproduction studies.
In women with diabetes, maternal hyperglycemia can be associated with congenital malformations as well as adverse effects in the fetus, neonate, and the mother (ACOG 2005; ADA 2018c; Metzger 2007). To prevent adverse outcomes, prior to conception and throughout pregnancy maternal blood glucose and HbA1c should be kept as close to target goals as possible but without causing significant hypoglycemia (ADA 2018c; Blumer 2013).
Agents other than miglitol are currently recommended to treat diabetes in pregnant women (ADA 2018c).
• Discuss specific use of drug and side effects with patient as it relates to treatment. (HCAHPS: During this hospital stay, were you given any medicine that you had not taken before? Before giving you any new medicine, how often did hospital staff tell you what the medicine was for? How often did hospital staff describe possible side effects in a way you could understand?)
• Patient may experience abdominal pain, flatulence, or diarrhea. Have patient report immediately to prescriber signs of low blood sugar (dizziness, headache, fatigue, feeling weak, shaking, a fast heartbeat, confusion, hunger, or sweating) (HCAHPS).
• Educate patient about signs of a significant reaction (eg, wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat). Note: This is not a comprehensive list of all side effects. Patient should consult prescriber for additional questions.
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Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about miglitol
- Miglitol Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Images
- Drug Interactions
- Support Group
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- Drug class: alpha-glucosidase inhibitors
Other brands: Glyset