Objective: To assess the use of prescribed antipsychotic treatments in the Spanish prison population in order to determine whether there are differences in efficacy and cost between the different long-acting antipsychotic injectables (LAIs).
Material And Method: An observational, retrospective study was carried out in twelve prisons and in two prison psychiatric hospitals. To assess efficacy, all the clinical histories of patients with some kind of LAI were reviewed and only those who were in a situation of therapeutic stability were selected, defined as those treatments that had not undergone any change in the three last months, both in doses and in the association of another antipsychotic.