1 Clozapine Inhibits Development and Expression of Nicotine-Induced Locomotor Sensitization in Rats HAKAN KAYIR 1 , GOKHAN GOKTALAY 1,2 , MURAT YILDIRIM 1 and TAYFUN I. UZBAY 1* 1 Department of Medical Pharmacology, Psychopharmacology Research Unit, Gulhane Military Medical Academy, Ankara, Turkey 2 Department of Pharmacology and Clinical Pharmacology, Uludag University, Faculty of Medicine, Bursa, Turkey RUNNING TITLE: CLOZAPINE AND NICOTINE-INDUCED SENSITIZATION * Address for correspondence Tayfun I Uzbay, Ph.D. Gulhane Military Medical Academy Faculty of Medicine Department of Medical Pharmacology Psychopharmacology Research Unit Etlik 06018 Ankara - Turkey Tel: 90 (312) 304 4764 Fax: 90 (312) 304 2010 E-mail: tuzbay@gata.edu.tr uzbayt@yahoo.com