High doses of INH are associated with metabolic acidosis, convulsions, rhabdomyolysis, lactic acidosis, coma, and even may cause death if not properly treated. The best treatment for INH intoxication-related convulsions is pyridoxine (vitamin B6) administration. Herein we present a case of a patient admitted to the emergency department after intractable seizures and metabolic acidosis with high anion caused by INH intoxication.