This paper presents data on mortality by drug dependence among Puerto Rican residents aged 15-44 of New York City. While men show death rates for drug dependence several times those of women, when deaths by drug dependence are calculated as a proportion of all deaths, the ratios are nearly the same for both sexes. Factors relevant to analyzing mortality statistics on drug dependence in this population are an undercount of Puerto Rican males and competing causes of death, particularly homicide among men. Factors influencing deaths by drugs are gender roles as they influence patterns of drug use and types of chronic use: regular and intermittent.