In mid to late May 2026, we tested a number of substances of particular health concern. In most of the cathinones submitted for analysis, one or more other cathinones were detected than expected, including in particular 4-CMC (4-chloromethcathinone). Furthermore, in a sample submitted for analysis as fentanyl, in addition to two previously unidentified opioids[1] which is many times more effective Carfentanil detected. A tablet submitted for analysis as ecstasy showed a unknown substance .

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 23 - 2026

In early to mid-May 2026, we tested a number of substances of particular health concern during stationary and mobile drug checking. In addition to MDMA, one sample submitted as MDMA contained the active ingredient 4-CMC was found. In two tablets dispensed as 2C-B, in addition to the expected active substance, one unknown substance detected. One cocaine sample contained only Procaine.

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 21 - 2026

At the end of April 2026, we tested a number of substances of particular health concern. In a fragment submitted for analysis as ecstasy, instead of the expected MDMA, a mixture of MDMA and Caffeine identified. In a sample submitted for analysis as HHC, the synthetic cannabinoid MDMB-PINACA and a unknown substance and in a hashish sample the synthetic cannabinoids ADMB-5en-HINACA and ADB-HEXINACA identified. 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 4-CMC, N-Ethylpentedron 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 KW 19 - 2026

In mid-April 2026, we tested a number of substances of particular health concern. In four tablets submitted for analysis as ecstasy, instead of the expected MDMA, a mixture of Amphetamine and Caffeine identified. In a sample submitted for analysis as cannabis, the synthetic cannabinoid ADMB-5en-HINACA identified. Four 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 2-MMC, 3-CMC, 4-CMC, N-Ethylpentedron and 4-BEC. Three samples submitted as cocaine also contained typical cocaine extenders such as Levamisole or procaine.

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 17 - 2026

At the end of March to the beginning of April 2026, we tested a number of substances of particular health concern during stationary and mobile drug checking. In one sample submitted as DMT instead 2C-B found; in a sample submitted as speed only the active substance DMT. In a tablet dispensed as the research benzodiazepine pyrazolam Bromazepam and an unknown substance was detected.

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 15 - 2026

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

At the end of February / beginning of March 2026, we tested a number of substances of particular health concern. In four tablets submitted for analysis as ecstasy, other ingredients were identified instead of the expected MDMA: two tablets contained a mixture of MDMA and caffeine, one tablet contained Amphetamine and caffeine and another the new psychoactive substance 3-FEA (3-fluoroethamphetamine). In four samples submitted for analysis as cannabis, synthetic cannabinoids (MDMB-PINACA or ADB-4en-PINACA) were identified. 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 LSD, including two tablets and one liquid, did not contain the expected substance, but one unknown substance.

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 11 - 2026