[Contribution of the laboratory to identification of drug addicts in psychiatric practice].

The AA. describe a thin-layer chromatographic method in which two elution systems are used in order to identify some drugs of addiction previously extracted from urines belonging to patients suspected to be addicts. They also studied the possible interferences due to drugs, particularly to psychotropic drugs, in psychiatric patients. The AA. noticed enough validity in identifying such drugs of addiction and a frequent possibility to exclude doubts derived from interfering substances. Some interferences seem to indicate the necessity of further careful studies.