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

At the end of March 2025, we tested a number of substances of particular health concern. In addition to high-dose ecstasy tablets, several cocaine samples also contained mixtures of known extenders such as Procaine, levamisole and caffeine. A sample submitted for analysis as MDMA instead contained 2-MMC. One sample submitted as 4-MMC and one as 3-MMC both contained instead 2-MMC, Another sample contained instead of 3-MMC Dimethylpentylone. In a 3-CMC sample, an additional Ketamine was found. In a sample submitted as Ritalin, a unknown substance was detected. One sample, which was delivered as N-ethylhexedrone, contained 4-Methylpentedrone.

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 14 - 2025

At the beginning and middle of March 2025, we tested a number of substances that pose a particular health risk. In addition to high-dose ecstasy tablets, a cocaine sample was tested instead of cocaine, Clindamycin was found. Five further cocaine samples also contained mixtures of known extenders such as Procaine, levamisole and caffeine. In addition to cannabis, three samples submitted as cannabis also contained Unknown substances was detected. In two tablets dispensed as XANAX (alprazolam) Flualprazolam was found. Two samples submitted as 3-MMC contained instead 2-MMC. In a further mephedrone sample, in addition to 4-MMC, a 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 KW 12 - 2025

At the end of February 2025, we tested a number of substances that pose a particular health risk. In addition to high-dose ecstasy tablets, a high dose of LSD was also detected on an LSD trip. A sample delivered as mephedrone contained cathinone instead of the expected 4-MMC 2-MMC and 3-CMC in traces. In another mephedrone sample N-Ethylpentedron was detected. In one sample submitted as CBD-P and one CBD-Edible Unknown substances found. A sample submitted as speed did not contain amphetamine, but Pregabalin.

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 10 - 2025

In mid-February 2025, we tested a number of substances of particular health concern. In all three samples submitted as 3-MMC, only the active substance 3-CMC was found. Also in two samples submitted as speed only 3-CMC detected. In two samples submitted as GHB, the active substance GBL 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 8 - 2025

In mid-January and early February 2025, we tested a number of substances of particular health concern during both stationary and mobile drug checking. In addition to a large number of high-dose ecstasy tablets, two tablets contained MDMA in addition to or instead of MDMA, Amphetamine and Caffeineanother 5-MeO-MiPT. In another MDMA sample 3-CMC and a cocaine sample was found to contain cocaine instead of Mephedrone and one unknown substance was detected. Several samples submitted as cocaine also contained combinations of the typical extenders Levamisole, procaine or Caffeine. In addition to amphetamine, two speed samples also contained MDMA or Cocaine. Another speed sample contained the following instead of amphetamine Methamphetamine, another Ketamine and another sample Cocaine. A sample submitted for analysis as ketamine contained 2-MMC. In addition to two high-dose 2C-B tablets, two others contained 2C-B several Unknown substances. Two LSD samples contained, in addition to or instead of the expected LSD, a unknown substance. In a sample passed off as cannabis MDMB-4en-PINACA was detected. Three samples submitted as mephedrone contained 4-MMC instead of the expected 4-MMC, 2-MMC. In three further 3-MMC samples 2-MMC or 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 KW 6 - 2025