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

At the beginning of July 2025, we tested a number of substances of particular health concern. The majority of the ecstasy tablets submitted for analysis contained a (very) high dose of MDMA. In addition to the expected amphetamine, a sample submitted as speed also contained a unknown substance and DPIA. Several cocaine samples also contained known extenders such as Levamisole, procaine and/or phenacetin. One sample submitted as mescaline also contained a unknown substance. A sample submitted as mephedrone instead contained 2-MMC. Two samples submitted as 3-MMC contained instead 3-CMC. In addition, in a pink powder sold as Tuci / Pink Cocaine, a mixture of Ketamine and MDMA 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 week 28 - 2025

At the end of June 2025, we tested a number of substances of particular health concern during mobile drug checking. Almost all ecstasy tablets handed in for analysis contained a (very) high dose of MDMA. A tablet dispensed as LSD contained a unknown substance. Three samples submitted as mephedrone did not contain mephedrone, but 2-MMC or ketamine. In addition, a pink powder dispensed as Tucibi contained a Mixture of ketamine, MDMA and 3-CMC 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 week 27 - 2025

In mid-June 2025, we tested a number of substances that pose a particular health risk. In a tablet sold as ecstasy, the active ingredients Methamphetamine, 5-MAPB and 5-MeO-MIPT were detected. Other tablets labelled as ecstasy were found to contain extremely high levels of active substances. One sample declared as speed contained only DMT and N-methyltryptamine. In two cannabis products, the synthetic cannabinoids MDMB-4en-PINACA and ADB-BUTINACA 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 26 - 2025

At the end of May / beginning of June 2025, we tested a number of substances of particular health concern. One tablet submitted for analysis as ecstasy contained a mixture of MDMA, amphetamine, caffeine, ketamine and ParacetamolSome other ecstasy tablets contained a (very) high dose of MDMA. Two samples submitted as ketamine contained Cocaine with extenders (levamisole and procaine respectively) and another ketamine sample contained 2-MMC and Procaine. In two MDMA samples Mephedrone was detected - once in addition to MDMA and once exclusively. In one CBD sample HHC (hexahydrocannabinol) .

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 24 - 2025

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

At the beginning of May 2025, we tested a number of substances of particular health concern. Some ecstasy tablets contained a (very) high dose of MDMA. A tablet submitted for analysis as 2C-B also contained a high dose of MDMA. In addition to cocaine, procaine was also detected in some cocaine samples. One sample submitted as methamphetamine showed N-Ethylpentedron and a 3-MMC sample instead contained 3-CMC. One sample submitted for analysis as cannabis also contained MDMB-4en-PINACA 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 20 - 2025

In mid / late April 2025, we tested a number of substances that pose a particular health risk. In addition to some high-dose ecstasy tablets, two tablets contained MDMA and Amphetamine respectively Caffeine detected. A mephedrone sample contained cathinone in addition to mephedrone 3-CMC (3-chloromethcathinone), another mephedrone sample contained only 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 week 18 - 2025

At the beginning of April 2025, we tested a number of substances of particular health concern. In a tablet sold as ecstasy, in addition to MDMA also Caffeine was found. One sample submitted as mephedrone contained only the active substance 4-CMC. An ecstasy tablet with an extremely high dose was also tested.

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 16 - 2025