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Ciprofloxacin (CPX) is a fluoroquinolone antibiotic used for treating respiratory, urinary tract, gastrointestinal and abdominal infections. There are only a limited number of studies related to neurological adverse effects of this drug in therapeutic doses. Therefore, in the present study, we aimed to investigate the influence of CPX, when administered at pharmacological doses, on behavioral parameters of rats and the probable underlying mechanisms. CPX was administered in single oral daily doses of 20 and 50 mg/kg for 14 days in rats. CPX-induced depression and anxiety were evaluated by modified forced swimming test and elevated plus maze test, respectively. Also, spontaneous locomotor activity and motor coordination were assessed by activity cage and Rota-rod apparatus. Effects of CPX administration on brain serotonin, dopamine, γ-amino-butyric acid (GABA), glutamate, adrenaline and noradrenaline …