The aim of this study was to investigate the status of antioxidant glutathione peroxidase (GSH-Px) during oxidative stress in blood serum of rats subjected to oral methotrexate administration at a dose 10 mg/kg B.W and administrated antioxidant therapy (vit A and glutamine) to reduced or ameliorate such stress. A total of thirty six, male Sprague-Dawley rats weighing (250 – 300) g divided equal...