1 IN VITRO AND IN VIVO STUDY OF EFFECT OF α-ADRENERGIC AGONIST- METHYLDOPA ON THE SERUM BIOCHEMICAL LABORATORY FINDINGS SAEED S. AL-GHAMDI Department of Pharmacology and Toxicology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia. *Corresponding author: Dr. Saeed S. Al-Ghamdi Department of Pharmacology and Toxicology, Faculty of Medicine, Umm Al-Qura University Makkah 21955 Saudi Arabia P.O. Box: 7607 Fax: (+9662) 5667 874 H/P: (+966) 504789119 E-mail: dr.s.s.alghamdi@gmail.com Key words: methyldopa, serum biochemical parameters, physiological or metabolic factors.