Acute drug poisonings are the first cause of hospital admission among in individuals less than 30 years of age in developed countries. In order to face this problem, an analytic process, including two steps, is proposed; first, a qualitative step leads quite quickly to a medical diagnosis; second, a quantitative step, in close collaboration with the clinician, allows a well adapted reanimation. The result is that the patient receive a quicker and more efficient treatment. Both the analyst and the clinician must know the limits and the requirements of such techniques.