Both licit and illicit psychotropic substances (PSs) affect the air.

Heroin and amphetamines are less and less frequent than cocaine and cannabinoids.

High concentrations of ketamine and amphetamines affect sites of consumption/handling.

螖⁹-tetrahydrocannabinol easily decomposes, producing cannabinol.

The PS concentrations at the life places exceed those detected at local network stations.