At the end of July 2025, we tested a number of substances of particular health concern. Almost all of the ecstasy tablets handed out contained a (very) high dose of MDMA. In addition to a high dose of MDMA, two ecstasy tablets also contained Caffeine. A sample submitted as MDMA instead contained 2-MMC. In addition to the expected amphetamine, a speed sample also contained 3 unknown substances. In four cocaine samples, in addition to or instead of cocaine Amphetamine, caffeine or levamisole was found. A sample submitted as ketamine instead contained 4-CMC. Three samples submitted as 3-MMC contained instead 2-MMC. In a 2C-B tablet, in addition to 2C-B, a unknown substance was found. In a sample submitted for analysis as mephedrone 3-CMC and in a 2-MMC sample instead 4-CMC was detected. In addition, a sample submitted as MDA instead contained Amphetamine and Mephedrone.

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 KW 32 - 2025