Consumption patterns and motivations are constantly changing with the complex developments in society as a whole. In the present study recent trends in the consumption of tobacco and alcohol are analysed. Data from surveys measuring use and non- use of tobacco and alcohol in Norway in 1979 and 1981 are used for describing changes in the patterns of consumption. Through bi- and multivariate analyses relationships between a set of demographic variables and use of the stimulants are assessed. An evaluation of the changes in the demographic structure of users and non-users is used for analysing possible future trends in the consumption.