Aims: This article aimed to study the effect of different caffeine concentrations on behaviour and motor activity of mice. Place and Duration of Study: This study took place in Faculty of Pharmacy, University of Tripoli, and was conducted between 2017 to 2018. Methodology: The experiment was carried out using 24 male mice (25-30 gm). Plus maze was used for screening antianxiety effect of caffeine. While swimming maze was used to test the antidepressant effect. Descriptive statistics was performed using SPSS (version 22), followed by one sample Kolmogorov-Simirnov test. One-Way ANOVA was applied to compare between groups and Post Hoc test (LSD). Results: At a dose of 100 mg/kg, caffeine produce significant decrease in the duration of immobility using forced swimming maze; while the lower (25 mg/kg) and the higher (200 mg/kg) doses did not produce any changes compared to the control. In plus maze, Caffeine decreases the anxiety measure at the dose used of 100 mg/kg; but did not change the anxiety measure when lower (25 mg/kg) or higher (200 mg/kg) doses used compared to the control. The spontaneous motor activity was decreased significantly after administration of the higher dose of 200 mg/kg; the lower dose (25 mg/kg) showed insignificant increase, while the dose of 100 mg/kg produce insignificant decrease in the spontaneous motor activity. Conclusion: Caffeine has dose dependent effect, in a dose 100 mg/kg it produce anxiolytic and antidepressant like action, while lower (25 mg/kg) and higher (200 mg/kg) doses did not show any changes. Caffeine also produce dose dependent decrease in the spontaneous motor activity, this indicate that caffeine produce CNS depression with higher doses. arabic 12 English 73
Sakina S. Saadawi, Khairi A. Alennabi, Sumaya Baayo, Amera Fares, Najwa Alosta, Suher M. Aburawi(3-2020)

Caffeine has dose-dependent effects on mood, attention, and physiology. Behavioral effects of caffeine in humans have also been well documented. This article aimed to study the effect of different caffeine concentrations on behavior and motor activity of mice. The experiments was carried out using 24 male mice (25-30gm). Plus maze was used for screening of antianxiety effect of caffeine. While swimming maze was used to test antidepressant effect. Statistical analysis were performed using computer program SPSS (version 22). At dose of 100 mg/kg, caffeine acted as anxiolytic compound. Caffeine increased motor activity at dose of 25mg/kg and decreased motor activity at dose of 200mg/kg. At dose of 100mg/kg, caffeine acted as antidepressant. In conclusion, caffeine can act as stimulant, while in over dose it acts as depressant. Caffeine showed to have anxiolytic effect in certain doses. arabic 14 English 91
Sakina Salem Mohammed Saadawi, ٍSuhera Mehemed Abdulsalam Aburawi, SUMAYA ESEDEEG ABDALLAH BAAIO(4-2018)