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

At the end of August 2025, we tested a number of substances of particular health concern during mobile drug checking. One tablet dispensed as ecstasy contained only one unknown substance was detected. In another tablet dispensed as ecstasy, the active ingredient 5-MeO-MIPT. In a cocaine sample only Paracetamol was found and in a sample submitted as 3-MMC the cathinone Brephedrone (4-BMC).

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 35 - 2025

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

In mid-July 2025, we tested a number of substances of particular health concern. Several ecstasy tablets contained a (very) high dose of MDMA. In addition to a high dose of MDMA, an ecstasy tablet also contained Amphetamine. In addition to cocaine, some cocaine samples also contained Extenders such as caffeine, levamisole, phenacetin, procaine or mixtures of these was found. A sample submitted as 3-MMC contained instead 2-MMC. Another contained 4-CMC. In two samples submitted for analysis as mephedrone, an additional unknown substance was found. Another mephedrone sample contained instead 2-MMC. One sample that was submitted as O-desmethyltramadol also contained, in addition to the expected active substance, a unknown substance. In addition, a pink powder sold as Tucibi / Pink Cocaine contained a Mixture from Ketamine, MDMA and caffeine proven.

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 30 - 2025