From the viewpoint of a constructivist perspective, social problems emerge not due to tensions in social structure but because people define a given situation as problematic. Such an approach is employed in this article, which presents the relation between the changing ways of defining the problem of drug-addiction and the strategies of counteracting it. This is exemplified using the case of Monar-Poland's biggest organization providing help and assistance to drug-addicts. During the 30 years of Monar's activity, the ways of perceiving the problem were changing. Continuity was marked in consistent implementation of drug-addict assistance programmes. The change, on the other hand, consisted mainly in seeking methods suiting particular needs and situations. The effect of such activities was divergence from the universal and restrictive model of addict therapy, employed initially, towards a diversified and more liberal offer of help.