In mid-August 2026, we tested a range of substances posing a particular health risk. Several tablets submitted for analysis as ‘ecstasy’ contained a high or very high dose of MDMA. In some cocaine samples, cutting agents such as Levamisole, Procaine and/or Caffeine It was found that a tablet sold as alprazolam contained, instead, Flualprazolam. One GHB sample also contained GBL and 2 unknown substances.
In some of the samples submitted as 3-MMC and 4-MMC, it was not the expected cathinone that was found, but another cathinone, including 4-CMC, 4-MMC, N-Ethylpentedron and 4-BEC identified. A sample labelled as CBD contained an unspecified a specific semi-synthetic cannabinoid.

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 for calendar week 35 – 2026

In late July / early August 2026, we tested a number of substances of particular concern to public health as part of our mobile and stationary drug-checking services. In several tablets submitted for analysis as ‘ecstasy’, in addition to or instead of MDMA, Caffeine were found. A number of other ecstasy tablets contained a high or very high dose of MDMA. In some cocaine samples, cutting agents such as Levamisole, Procaine and/or Phenacetin was found. The majority of the samples submitted as 3-MMC and 4-MMC did not contain the expected cathinone, but rather a different cathinone, including 3-CMC, 4-CMC and N-Ethylpentedron.

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, calendar week 33 – 2026

Several tablets sold as ecstasy contained ingredients other than the expected MDMA. One tablet contained PMMAanother N-Ethylpentedron and another tablet contained, instead of MDMA, a unknown substance. In a sample submitted as cannabis, the synthetic cannabinoids MDMB-INACA, ADB-4en-PINACA, MDMB-4en-PINACA, 5F-MDMB-PINACA identified. A sample submitted as cocaine contained only Procaine. Furthermore, cathinone was detected in both a sample submitted as 3-MMC and one submitted as 4-MMC N-Ethylpentedron identified. A substance sold as ‘Tusibi – pink Cocaine’ contained, in addition to MDMA, Ketamine, Caffeine and 2C-B also 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, calendar week 31 – 2026

In early/mid-July 2026, we tested a range of substances of particular concern to public health. In a sample submitted for analysis as MDMA, the following were found alongside MDMA: 2-MMC detected; in another MDMA sample, a mixture of Ketamine and 2-MMC. The majority of samples submitted for analysis as 2-MMC, 3-MMC or 4-MMC (mephedrone) did not contain the expected cathinone, but rather one or more other cathinones, including N-Ethylpentedron and 4-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 for calendar week 29 – 2026

Between mid- and late June 2026, we tested a number of substances of particular concern to public health as part of our in-person drug-checking service. In addition to some ecstasy tablets containing extremely high doses, one tablet was found to contain a mixture of MDMA, 4-CMC, caffeine, 1-PEA and one unknown substance detected. A sample submitted as GHB contained only GBL. In a sample sold as MDMA, the active ingredients were 4-MMC (Mephedrone), 4-CMC and 4-BEC identified.

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 for calendar week 27 – 2026

In early June 2026, we tested a number of substances of particular concern to public health. In two samples submitted for analysis as mephedrone (4-MMC), the following were also found: 4-BEC or 4-MEC was detected. Furthermore, in several samples sold as 3-MMC 4-CMC and/or N-ethylpentedrone (NEP) found. One sample each, labelled as LSD and MDMA, contained instead a unknown substance. Alongside a few very high doses of MDMA In addition to the expected MDMA, several ecstasy tablets were also found to contain traces of Caffeine or instead Amphetamine, 3-CMC or a unknown substance determined.

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 for calendar week 25 – 2026