Dantrolene Sodium Injectable Suspension) may treat, side effects, dosage, drug interactions, warnings, patient labeling, ... Dantrolene is found in measurable amounts in blood and urine. Its major metabolites in body fluids are 5-hydroxy dantrolene and ... Dantrolene is present in human milk. In one case report, low dantrolene concentrations (less than 2 micrograms per milliliter) ... When prophylactic intravenous dantrolene infusion was administered, whole blood dantrolene concentrations remained at a near ...