At the beginning of October 2025, we tested a number of substances of particular health concern during mobile drug checking. In addition to some (very) high-dose ecstasy tablets was also presented in a LSD-tablet was found to contain a high dose. A sample delivered as mephedrone (4-MMC) instead contained 2-MMC and one sample declared as 4-CMC showed a mixture of different cathinones: 4-CMC, mephedrone (4-MMC) and 4-BEC.

Under the following link, all samples that have been analysed by checkit! since the last warnings and classified as high-dose, unexpected or of particular health concern are presented in detail: Current warnings week 41 - 2025