Introduction: As a consequence of the discovery of numerous abnormalities in the prescription of biochemistry emergency parameters, the objective of this work was to establish an inventory of the emergency prescriptive practices within hospital departments of Ibn Rochd university hospital of Casablanca, for possible corrective actions. Material and methods: A prospective transversal descriptive study was carried out on all the biochemical assessments prescribed during the guards (nights and weekends) and done in the laboratory of biochemistry of UH-Ibn Rochd of Casablanca, from June 1st to October 31st, 2015. The statistical analysis was done on Excel. Results: During the study period, we received 9020 biochemical assessments with 73216 parameters. About 12% of these assessments were prescribed by non-emergency departments (and 88% by emergency departments). We found that non-emergency parameters were prescribed with a relative high frequency such as lipid status (triglycerides accounted for 0.48% of prescriptions (n = 352), total cholesterol 0.45% (n = 330) and LDL-cholesterol and HDL-cholesterol 0.3% (n = 220). In addition to this, 90% of the prescriptions were sent without clinical information. Discussion and conclusion: This study revealed dysfunctions concerning the prescription of emergency biochemical assessments. For this purpose, a clinical-biological collaboration is necessary to implement corrective actions such as the drafting of prescription procedures of emergency assessments.