https://www.selleckchem.com/products/Y-27632.html 1% (95% CI 64.3-75.4%). Female students self-medicated more often than male students odds ratio = 1.45 (95% CI% 1.17-1.79). The prevalence of self-medication in medical students (97.2%) was higher than in non-medical students (44.7%). The I test indicated high, statistically significant heterogeneity. The sensitivity analysis showed that the results were stable. The prevalence of self-medication among students worldwide is high. Programmes on the risks of self-medication and increasing control and monitoring of the sale of drugs are recommended. Facilitating students' access to doctors and health centres could reduce self-medication in students. The prevalence of self-medication among students worldwide is high. Programmes on the risks of self-medication and increasing control and monitoring of the sale of drugs are recommended. Facilitating students' access to doctors and health centres could reduce self-medication in students. The worldwide prevalence estimates for attention deficit hyperactive disorder (ADHD) are extremely heterogeneous. Diagnosis in children demands symptoms be present in at least 2 different settings, mainly school and home. The proportion of children estimated to have ADHD can vary based on whether the symptoms are evaluated by parents or teachers. This study determined whether ADHD and its subtypes are better recognized by parents or teachers. Our study included 1326 schoolchildren (boys = 712, girls = 614; age range 6-12 years). We prepared 2 questionnaires for each student enrolled in the study; one was completed by the student's parents and the other by the teacher. We included students who attended 3 selected schools in the cities of Amman and Karak in Jordan during the first term of 2017. The Arabic version of the Diagnostic and statistical manual of mental disorders, 4th edition, was used for the diagnosis and classification of ADHD. Of the 1326 students included in this study, 254 (19.2