A recent study conducted by researchers from the Federal University of São Paulo (Unifesp) indicates that the percentage of Brazilians who have reported experimenting with an illicit psychoactive substance at least once in their lives has increased from 10.3% to 18.8% over the last eleven years. Known as the III National Alcohol and Drug Survey (Lenad III), this research serves as one of Brazil's key epidemiological references regarding substance use. The sharp increase in drug experimentation is particularly attributed to the rising use of marijuana, reflecting a trend seen in various Western countries.

Psychologist Clarice Madruga, who coordinated the study, indicated that the increase was anticipated due to the significant gap between this survey and the last one conducted in 2012, along with changing social perceptions regarding the risks associated with marijuana. In 2012, Brazil's prevalence of marijuana use was notably lower compared to that of other countries, but this study's findings highlight a shift in societal attitudes over the past decade. This shift may suggest growing acceptance and normalization of marijuana use among the population.

Moreover, while marijuana consumption has increased, the use of cocaine and crack has stabilized. This stability could imply various underlying factors, including potential health education efforts, law enforcement strategies, or economic influences that may have mitigated further increases in these more harmful substances. The findings from the Lenad III survey are critical for shaping public health policies and intervention strategies in Brazil as the country grapples with its evolving drug landscape.