The prevention policy aimed at users of illegal drugs is not concerned with use itself only but, among other things, with the consequences of that use when it is not discontinued. In this perspective, various facets of a DrHr policy have been set up in France over something short of twenty years now. The study discussed in part herein was concerned, firstly, with the actors implementing that policy, and especially those working with the most marginal users, and secondly, with their work. Using the tools developed by sociologist E. Hughes, we have reflected on the definition of the « license » (I) and the mandate (II) of these professionals, thus shedding new light on the stakes presently involved in this government policy.
