Abstract: The effect of AMG- 1 6( 5-hydroxy- 2- methylpyridylamino )-9 ribofranosylpurine on mouse brain energy metabolism in complete brain ischemia induced by decapitation and on neurological deficit and histopathological changes after occlusion of the middle cerebral artery (MCAO) in rats were studied. The results indicate that AMG-1 has an effect of improving the status of energy metabolism in complete brain ischemia in mice. Lactate concentration was greatly reduced and the ATP and phosphocreatine levels were significantly elevated. Treatment with AMG-1 or nimodipine was performed before and after MCAO. The score of neurological deficit was significantly decreased as compared with the vehicle treated group. The extent of ischemic neuronal injury was determined by histopathological examination. AMG- 1 and nimodipine seemed to attenuate the MCAO-induced neuronal damage. In as much as AMG- 1 can improve the status of brain energy metabolism, neurological deficit and neuronal damage after ischemic insult, AMG- 1 may have a beneficial effect for the treatment of cerebral ischemic damage.