RT Journal A1 CLARKE TA, SAUNDERS BS, FELDMAN B, Scholl ML T1 PYridoxine-dependent seizures requiring high doses of pyridoxine for control JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1979 FD September 1 VO 133 IS 9 SP 963 OP 965 DO 10.1001/archpedi.1979.02130090091021 UL http://dx.doi.org/10.1001/archpedi.1979.02130090091021 AB Pyridoxine (or vitamin B6) dependency is a rare but well-recognized cause of neonatal seizures and, if not treated early, may lead to irreversible mental retardation. The diagnosis depends on the control of clinical and electrical seizure activity by pyridoxine hydrochloride. Previous reports have shown clinical control of seizures in seconds to minutes and EEG control in minutes to days.1.2 Because of the rarity of pyridoxine dependency as a cause of neonatal seizures, the lack of a specific laboratory diagnostic test, and the inexactness of the literature concerning EEG response to therapy, the clinician may overlook this disease. We recently cared for an infant who had focal neonatal seizures that responded to unusually high doses of pyridoxine.Report of a Case.—A 3.0-kg male was lelivered at term by elective cesarean section for double-footling presentation to a 22-year-old gravida 3, para 1, abortus 1 mother. The Apgar score was