Microgram: The Johnson County Sheriff's Office Criminalistics Laboratory (Mission, Kansas) recently received a multi-exhibit submission consisting of: [...] two and one half white, round tablets with a stylized 'X' (cross or crossbones) logo, suspected MDMA [...]. The exhibits were seized by the Mission Police Department pursuant to a DUI traffic stop in Mission. The 'X' tablets were approximately 8 millimeters in diameter by 4 millimeters in thickness, and were rather crudely manufactured (average weight not determined, but typical of Ecstasy tablets). Analysis by GC/MS confirmed primarily MDMA, but also a small amount of 3,4-methylenedioxydimethylamphetamine (MDDMA) and caffeine, in an approximate 100 : 3 : 1 ratio based on the TIC. MDDMA is a structural isomer of 3,4-methylenedioxyethylamphetamine (MDEA); therefore, the identification was confirmed via comparison with an authentic standard provided by the DEA. The MDMA was not formally quantitated, but the loading appeared to be typical of Ecstasy tablets. These were the first confirmed tablets containing MDDMA, and also the first tablets with the stylized 'X' logo, submitted to the laboratory.