In mid and late May 2025, we tested a number of substances of particular health concern. Some ecstasy tablets contained a (very) high dose of MDMA. Instead of MDMA, an ecstasy tablet contained a mixture of AMT and caffeine. In two samples submitted for analysis as MDMA, instead 2-MMC was found. A sample submitted as low-THC edible instead contained MDMB-4en-PINACA. A CBD cannabis sample also contained a unknown substance. In two other THC cannabis samples, in addition to or instead of this, also Unknown substances detected. A third THC cannabis sample contained not only cannabis but also MDMB-BUTINACA. Several cocaine samples also contained typical extenders such as Levamisole, procaine, phenacetin and/or caffeine. A sample submitted as mephedrone showed N-Ethylpentedron and a 3-MMC sample instead contained 3-CMC.

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 22 - 2025