In November 2025, we tested a number of substances that are particularly harmful to health using stationary drug checking. A sample submitted as GHB was found to contain GBL found. In several tablets sold as ecstasy, in addition to MDMA or instead of MDMA, Caffeine detected. The synthetic cannabinoid was found in two cannabis samples. MDMB-PINACA identified. Two samples submitted as Tusi/Tusibi contained mixtures of several psychoactive substances.

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 48 – 2025

At the end of October / beginning of November 2025, we tested a number of substances of particular health concern. In addition to some (very) high-dose ecstasy tablets, some ecstasy tablets also contained one or more other psychoactive substances, often in small quantities or traces. Two samples submitted for analysis as „speed“ contained the following instead Cathinone 2-MMC. A sample submitted as MDMA instead showed Mephedrone (4-MMC) on. In several THC cannabis samples, one CBD cannabis sample and one H4 CBD sample, various synthetic cannabinoids were detected in addition to cannabis (AB-CHMINACA, MDMB-BUTINACA, MDMB-PINACA). None of the samples submitted for analysis as 3-MMC contained 3-MMC, but all contained a different synthetic cathinone: N-Ethylpentedron, Brephedrone (4-BMC) or 2-MMC.

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 46 - 2025

At the end of October 2025, we tested a number of substances of particular health concern. In addition to several samples submitted for analysis as ecstasy tablets containing high doses of MDMA, two tablets also contained Caffeine and in a tablet instead of MDMA, Amphetamine was detected. In some samples submitted for analysis as cocaine, mixtures of cocaine, Caffeine or procaine was found. One 2C-B sample also contained a unknown substance. In a sample submitted for analysis as MDMA, in addition to MDMA also N-Ethylpentedron were found. One sample submitted for analysis as speed and one as MDMA were instead found to be Methamphetamine.

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 44 - 2025

At the end of September / beginning of October 2025, we tested a number of substances of particular health concern. One sample submitted for analysis as MDMA instead contained Mephedrone (4-MMC) detected. In addition to mephedrone, one sample submitted as mephedrone also contained 4-Bromoethcathinone (4-BEC). In a tablet dispensed as XANAX (alprazolam) only Paracetamol .

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 42 - 2025

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

At the end of September 2025, we tested a number of substances of particular health concern during inpatient drug checking. One sample submitted as CBD cannabis contained CBD and the synthetic cannabinoid MDMB-PINACA. Several tablets sold as ecstasy were found to contain very high doses of MDMA detected. Instead of the expected 2-MMC, one sample contained the active substance 4-BMC and in a sample submitted as 3-MMC only the active substance Ketamine found.

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 40 - 2025

At the beginning of September 2025, we tested a number of substances of particular health concern. Several ecstasy tablets contained a (very) high dose of MDMA. One sample submitted for analysis as MDMA also contained, in addition to MDMA Amphetamine. A cocaine sample instead contained a unknown substance. In addition to ketamine, a ketamine sample also contained Caffeine, 2-MMC and N-Ethylpentedron were found. One sample submitted as mephedrone (4-MMC) and one sample submitted as methamphetamine contained a unknown substance. In addition, one sample submitted as DMT also contained NBoc-DMT and one unknown substance found.

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 38 - 2025

At the end of August 2025, we tested a number of substances of particular health concern. Several ecstasy tablets contained a (very) high dose of MDMA. One sample submitted for analysis as MDMA turned out to be Ketamine. In addition to cocaine, several cocaine samples also contained typical extenders such as Levamisole, procaine, phenacetin or Caffeine. In a ketamine sample we were able to Deschloro-N-ethylketamine detect. In two samples delivered as mephedrone (4-MMC), instead 3-CMC, in another 4-CMC found. Two samples handed in as CBD cannabis and one as THC cannabis contained new synthetic cannabinoids such as MDMB-INACA, MDMB-PINACA, MDMB-4en-PINACA or MDMB-BUTINACA. In a 3-MMC sample, mephedrone (4-MMC) and 3-CMC detected. One sample submitted as methamphetamine proved to be 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 week 36 - 2025