More use of ketamine and crack cocaine, but slightly less of cannabis and crystal meth: these are the results of analyses of wastewater conducted by researchers at the Swiss Federal Institute of Aquatic Science and Technology (Eawag). + Get the most important news from Switzerland in your inbox New figures taken from samples from the first half of 2025 appeared on the substance monitoring portal Dromedario on Thursday. Eawag experts examined trends in the use of certain substances for which uncertain sales figures or none at all are available, the institute said on Thursday. Based on the idea that "wastewater doesn't lie", the experts used wastewater analyses to draw conclusions about patterns, increases and decreases in drug consumption among the Swiss population. More ketamine at the weekend They found a significant increase in ketamine in the wastewater, an indication that ketamine use is on the rise in Switzerland. Ketamine is an anaesthetic used in medical procedures. However ...
