This study was carried out to investigate the effect of chamomile flower aqueous extract on different biochemical parameters in pentylenetetrazole (PTZ) induced-convulsive chicks. Parameters included were serum total antioxidant capacity (T-AOC), serum and brain gamma-aminobutyric acid (GABA), serum cholinesterase enzyme activity (ChE), electrolytes (Na+,K+, and Cl-), total calcium (Ca2+), serum glucose and total protein concentration.The dried flowers parts of chamomile (Matricaria chamomilla L.) were subjected to aqueous extraction and given at (200, 400 and 600mg/kg orally), for its anticonvulsant effects and the effect was compared with the standard anticonvulsant drug sodium valproate (200mg/kg). A dose of 200mg/kg showed full protection against PTZ convulsions, whereas doses of 400 and 600 mg/kg reduced the latency and onset of convulsion. The results suggest that the aqueous extract of chamomile flower may produce anticonvulsant effects via biochemical changes including significant increases in serum T-AOC, serum GABA, serum ChE activity and Na+, and a significant reduction in K+ and serum glucose concentration have been observed.