This descriptive-exploratory research, analizes outputs derived from the application of an structured instrument to subjects in a trust system prison in Costa Rica. it introduces epidemiological data on drug consumption, the risk perception of the individuals toward different drug intake practices and  discusses the relation between risk behavior and family environment during childhood with drug abuse and crime behavior. Some comparisons are done with studies carried out with other populations.

consumption of drugs; perceptions of risk; private of liberty; penitentiary system; Costa Rica