A) MANAGEMENT OF MILD TO MODERATE TOXICITY
1) Treatment is symptomatic and supportive. Miglitol alone does not cause hypoglycemia; however, concomitant administration of miglitol and other antidiabetic agents (eg, insulin, sulfonylureas) may increase the risk of hypoglycemia. Monitor blood glucose frequently in these patients.
B) MANAGEMENT OF SEVERE TOXICITY
1) Treatment is symptomatic and supportive. Severe toxicity is not expected after overdose of miglitol. Correct any significant fluid and/or electrolyte abnormalities in patients with severe diarrhea. Miglitol alone does not cause hypoglycemia; however, concomitant administration of miglitol and other antidiabetic agents (eg, insulin, sulfonylureas) may increase the risk of hypoglycemia. Monitor blood glucose frequently in these patients. Refer to "SULFONYLUREA AND RELATED AGENTS" for specific treatment information.
C) DECONTAMINATION
1) PREHOSPITAL: Severe toxicity is not expected, GI decontamination is generally not indicated unless other more toxic co-ingestants are involved.
2) HOSPITAL: Severe toxicity is not expected, GI decontamination is generally not indicated unless other more toxic co-ingestants are involved.
D) AIRWAY MANAGEMENTS
1) Should not be required in these cases. COMBINATION OVERDOSE: The airway may need to be protected in patients with coma that persists after serum glucose correction.
E) ANTIDOTE
1) None.
F) HYPOGLYCEMIA
1) Miglitol alone does not cause hypoglycemia; however, concomitant administration of miglitol and other antidiabetic agents (eg, insulin, sulfonylureas) may increase the risk of hypoglycemia. Monitor blood glucose frequently in these patients. Intravenous dextrose will initially reverse hypoglycemia (if symptomatic or BS less 60 mg/dL; 50 mL of 50% dextrose in adults; in children 0.5 to 1 g/kg of 25% dextrose in water (D25W 2 to 4 mL/kg/dose)). Refer to "SULFONYLUREA AND RELATED AGENTS" for specific treatment information.
G) ENHANCED ELIMINATION
1) Severe toxicity is not expected therefore hemodialysis is not indicated. Miglitol has a protein binding of less than 4% and a volume of distribution of 0.18 L/kg (consistent with distribution primarily into the extracellular fluid). Theoretically, hemodialysis would be effective at clearing miglitol.
H) PATIENT DISPOSITION
1) HOME CRITERIA: A patient with an inadvertent exposure, that remains asymptomatic can be managed at home.
2) OBSERVATION CRITERIA: Patients with a deliberate overdose, and those who are symptomatic, need to be monitored for several hours to assess electrolyte and fluid balance and gastrointestinal function. Patients that remain asymptomatic can be discharged.
3) ADMISSION CRITERIA: Patients should be admitted for severe vomiting, profuse diarrhea, severe abdominal pain, dehydration, and electrolyte abnormalities.
4) CONSULT CRITERIA: Consult a poison center or medical toxicologist for assistance in managing patients with severe toxicity or in whom the diagnosis is not clear.
I) PITFALLS
1) When managing a suspected miglitol overdose, the possibility of a coingestant(s) should be considered. Clinical manifestations of hypoglycemia can easily be mistaken for intoxication with ethanol or other substances of abuse.
J) PHARMACOKINETICS
1) Miglitol absorption is saturable at high doses (25 mg is completely absorbed whereas a dose of 100 mg is only 50 to 70% absorbed). Protein binding: Minimal (less than 4%). Vd: 0.18 L/kg (consistent with distribution primarily into the extracellular fluid). In studies with humans and animals, miglitol was not metabolized. Elimination half-life: approximately 2 hours. Excretion: 95% of the dose was recovered in the urine within 24 hours following a 25-mg dose.
K) DIFFERENTIAL DIAGNOSIS
1) In cases of combination overdose, consider any condition that can cause hypoglycemia including sulfonylurea overdose, starvation, alcoholism, insulinoma, or sepsis.