A clinical tool with heroin addicts: the urine stall

Detection of illicit drug use by means of urine analysis has become a standard procedure in the treatment of drug addicts. Withholding urine is a way in which an addict can compromise the effectiveness of urine analysis. This behavior can be a form of acting out and should not be interpreted in a superficial manner. An attempt should be made to explore the latent psychological material it may represent.