Overdosage
Because Dantrium® Intravenous must be administered at a low concentration in a large volume of fluid, acute toxicity of Dantrium® could not be assessed in animals. In 14-day (subacute) studies, the intravenous formulation of Dantrium® was relatively non-toxic to rats at doses of 10 mg/kg/day and 20 mg/kg/day. While 10 mg/kg/day in dogs for 14 days evoked little toxicity, 20 mg/kg/day for 14 days caused hepatic changes of questionable biologic significance.
Symptoms which may occur in case of overdose include, but are not limited to, muscular weakness and alterations in the state of consciousness (e.g., lethargy, coma), vomiting, diarrhea, and crystalluria.
For acute overdosage, general supportive measures should be employed.
Intravenous fluids should be administered in fairly large quantities to avert the possibility of crystalluria. An adequate airway should be maintained and artificial resuscitation equipment should be at hand. Electrocardiographic monitoring should be instituted, and the patient carefully observed.
The value of dialysis in Dantrium® overdose is not known.
For aditional information, please see Full Prescribing Information