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Miglitol
Pronunciation
U.S. Brand Names
Generic Available
Pharmacological Index
Use
Pregnancy Risk Factor
Contraindications
Warnings/Precautions
Adverse Reactions
Overdosage/Toxicology
Drug Interactions
Mechanism of Action
Pharmacodynamics/Kinetics
Usual Dosage
Monitoring Parameters
Reference Range
Mental Health: Effects on Mental Status
Mental Health: Effects on Psychiatric Treatment
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Dosage Forms

Pronunciation
(MIG li tol)

U.S. Brand Names
Glyset®

Generic Available

No


Pharmacological Index

Antidiabetic Agent (Miscellaneous)


Use

Noninsulin-dependent diabetes mellitus (NIDDM)

Monotherapy adjunct to diet to improve glycemic control in patients with NIDDM whose hyperglycemia cannot be managed with diet alone

Combination therapy with a sulfonylurea when diet plus either miglitol or a sulfonylurea alone do not result in adequate glycemic control. The effect of miglitol to enhance glycemic control is additive to that of sulfonylureas when used in combination.


Pregnancy Risk Factor

B


Contraindications

Diabetic ketoacidosis, inflammatory bowel disease, colonic ulceration, partial intestinal obstruction, patients predisposed 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; hypersensitivity to drug or any of its components


Warnings/Precautions

GI symptoms are the most common reactions. The incidence of abdominal pain and diarrhea tend to diminish considerably with continued treatment. Long-term clinical trials in diabetic patients with significant renal dysfunction (serum creatinine >2 mg/dL) have not been conducted. Treatment of these patients is not recommended. Because of its mechanism of action, miglitol administered alone should not cause hypoglycemia in the fasting of postprandial state. In combination with a sulfonylurea will cause a further lowering of blood glucose and may increase the hypoglycemic potential of the sulfonylurea.


Adverse Reactions

>10%: Gastrointestinal: Flatulence (41.5%), diarrhea (28.7%), abdominal pain (11.7%)

1% to 10%: Dermatologic: Rash


Overdosage/Toxicology

An overdose of miglitol will not result in hypoglycemia. An overdose may result in transient increases in flatulence, diarrhea, and abdominal discomfort. No serious systemic reactions are expected in the event of an overdose.


Drug Interactions

Decreased effect:

Digestive enzymes (amylase, pancreatin, charcoal) may reduce the effect of miglitol and should not be taken concomitantly


Mechanism of Action

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 diabetic patients, this enzyme inhibition results in delayed glucose absorption and lowering of postprandial hyperglycemia


Pharmacodynamics/Kinetics

Absorption: Saturable at high doses: 25% mg dose: Completely absorbed; 100 mg dose: 50% to 70% absorbed; Peak concentrations within 2-3 hours

Distribution: Vd: 0.18 L/kg

Protein binding: Negligible (<4%)

Metabolism: Not metabolized

Half-life, elimination: ~2 hours

Elimination: Renal as unchanged drug


Usual Dosage

Adults: Oral: 25 mg 3 times/day with the first bite of food at each meal; the dose may be increased to 50 mg 3 times/day after 4-8 weeks; maximum recommended dose: 100 mg 3 times/day

Dosing adjustment in hepatic impairment: No adjustment necessary


Monitoring Parameters

Monitor therapeutic response by periodic blood glucose tests; measurement of glycosylated hemoglobin is recommended for the monitoring of long-term glycemic control


Reference Range

Target range: Adults:

Glycosylated hemoglobin: <7%


Mental Health: Effects on Mental Status

None reported


Mental Health: Effects on Psychiatric Treatment

None reported


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

No effects or complications reported


Patient Information

Take this medication exactly as directed, with the first bite of each main meal. Do not change dosage or discontinue without first consulting prescriber. Do not take other medications with or within 2 hours of this medication unless so advised by prescriber. It is important to follow dietary and lifestyle recommendations of prescriber. You will be instructed in signs of hypo-/hyperglycemia by prescriber or diabetic educator. If combining miglitol with other diabetic medication (eg, sulfonylureas, insulin), keep source of glucose (sugar) on hand in case hypoglycemia occurs. You may experience mild side effects during first weeks of therapy (eg, bloating, flatulence, diarrhea, abdominal discomfort); these should diminish over time. Report severe or persistent side effects, fever, extended vomiting or flu, or change in color of urine or stool. Breast-feeding precautions: Consult prescriber if breast-feeding.


Dosage Forms

Tablet: 25 mg, 50 mg, 100 mg


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