The data for the tables in this resource are provided by the Health Research Board's National Drug and Alcohol Survey (NDAS). The NDAS collects information on alcohol and tobacco, and drug use among the general population in Ireland. The NDAS also surveys people’s attitudes and perceptions relating to tobacco, alcohol and other drug use and records the impact of drug use on people’s communities. The 2019/20 NDAS collected information from 5,762 people aged 15 and over across Ireland. This is the fifth such survey undertaken in Ireland, providing an opportunity to observe trends over time. Data from all five surveys are available. This survey was undertaken in the Republic of Ireland only. Through these interactive tables you can search for prevalence data on all of the substances included in the survey. The results of your analysis can be organised by year, age group, drug type, gender, and other variables.