[Naltrexone use in the treatment of alcoholism in Spain]. / Utilización de naltrexona en el tratamiento del alcoholismo en España.

To analyse the causes that prompted health care professionals to select naltrexone to treat alcoholism. One-year multicentric, prospective study conducted with 221 doctors specialized in alcoholism treatment and analysis of data derived from 1,396 patients attended. Naltrexone was not prescribed to 446 patients. The medical barriers to the prescription of naltrexone included the mode of understanding alcoholism by doctors (20 % of doctors), patients reluctance to take naltrexone (26.9 % of patients), the presence of a concomitant condition (27.6 %) and barriers associated with health care system (6 % of patients). The logistic regression model explained why doctors tended not to prescribe naltrexone when patients had a long course of their disease or had previously received acamprosate.