An 11-month-old boy was brought to the pediatric emergency department
for evaluation of acute onset of irritability and involuntary side-to-
side turning of the head. Neurologic examination revealed cortical bli
ndness, Toxicologic studies of blood and urine were positive for metha
mphetamine, The infant's vision and activity returned to normal within
12 hours, The possible mechanisms of this unusual form of amphetamine
toxicity are discussed.