Benzodiazepines are a group of major therapeutic drugs, but its abuse is associated with dependence and other adverse effects. Its great for self consumption during the decade 1980-1989, led the health authority to establish in 1993 the control of prescribing and dispensing. The aim of this study was to determine the trend of use of these drugs by the population that goes to pharmacies. To that end, we examined the prescriptions dispensed for a period for three months covering the years 2003 and 2007, private pharmacies in the center of Concepción, and supplemented with information gathered randomly using questionnaires to patients who attended these pharmacies. The variables were considered among others gender, reason for the prescription, a specialist prescribed, dispensed drugs. The results indicated that women were the most used them (72%). The reason for prescription was predominantly anxiolytic and hypnotic effects. General practitioners, psychiatrists and neurologists prescribed the drugs (45%, 23% and 12%), respectively. Data that correspond to work performed in 1988 in Concepción. Among the drugs dispensed, clonazepam, alprazolam and lorazepam. It can be concluded that benzodiazepines are a group widely used in clinical treatment, and that trend continues over time, despite the implementation of the control of the prescription.