The objectives of this study are to describe prescribing practices, to evaluate their appropriateness and their compliance with guidelines and to examine their influencing factors. We conducted a cross-sectional study of antibiotic prescriptions data of 105 patients in the medical and surgical Emergency Department of the Military Hospital of Instruction Mohammed V in Rabat over a period of one month. Data were collected by means of a questionnaire including demographic and anamnestic data, patient's history, allergies, specific clinical examination data, paraclinical data, detailed antibiotic prescription. Collected data were then evaluated by a referring physician, who was responsible for detecting any treatment error. Among infections requiring the prescription of antibiotics, respiratory and urinary system diseases were at the forefront, the most commonly used antibiotic families were penicillins, quinolones and cephalosporins. 74 prescriptions (70.5%) were both pertinent and compliant versus 9 prescriptions (8.6%) justified but nonpertinent and 6 prescriptions (5.7%) which were considered unjustified by the referring physician due to absence of infection. The evaluation of the existing medical practice is rarely conducted in health facilities; with this in mind, our case study aims to improve appropriate antibiotic prescribing and to optimize its compliance with guidelines.