Psychotropic drug use in a Swedish community--patterns of individual use during 2 years

Psychotropic drug use in a Swedish community with a general population of about 20,000 was studied using data from a research registry on prescriptions. Patterns of individual psychotropic drug use during 2 years, 1980 and 1981, were analyzed. Use during the second year was studied in relation to use during the first year, and individuals with continued and new use were identified. About two thirds of those who obtained psychotropics during the first year continued using such drugs during the following year. Among those with no use during the first year, 6% obtained psychotropic drugs during the second year. Both continued and new use increased with age. Psychotropic drug use was nearly twice as common among women as compared to men among new users, whereas practically no sex difference was observed in continued use among previous users of psychotropics. Despite the finding that male psychotropic drug users were almost as likely as females to continue using these drugs, the overall proportion of continuous users in the population remained considerably higher among women as compared to men. The results from this study suggest that the greater use of psychotropics among women can be explained by a greater extent of occasional use as well as continuous use among women as compared to men.