In mid-March 2026, we tested a number of substances of particular health concern. In addition to the expected MDMA, two tablets submitted for analysis as ecstasy also contained Caffeine identified. In a sample submitted for analysis as cannabis, the synthetic cannabinoid ADB-BUTINACA identified. Two further cannabis samples each contained an additional one, unknown substance. The majority of samples submitted as 3-MMC or mephedrone (4-MMC) did not contain the expected cathinone, but another cathinone or a mixture of several cathinones, including 3-CMC, 4-CMC, N-Ethylpentedron and 4-BEC. Three samples submitted as cocaine also contained typical cocaine extenders such as Procaine, phenacetin, levamisole or caffeine. A substance delivered as unknown contained Fluorexetamine.

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 13 - 2026