Analysis of a New Type Tablet Containing l (−)-methamphetamine

We report that a new type of l (−)-methamphetamine (MAMP) tablet recently found in Tochigi Prefecture is an abused drug of a new class. This tablet contains not only the stimulant l (−)-MAMP but also the stimulant caffeine and the anaesthetic ketamine. The constituent is the mixing ratio of 3.7% (approximately 13 mg) for l (−)-MAMP, 40.0% (approximately 140 mg) for caffeine and 9.1% (approximately 32 mg) for ketamine per one tablet. We are worrying about regular use of this new tablet as well as the traditional d (+)-MAMP crystal because these substances exhibit habituation and addiction, though its constituents were not detected from the urine specimens of a subject.