This Order adds a further group of cathinone derivatives (including Naphthylpyrovalerone, commonly known as Naphyrone) to Part 2 of Schedule 2 to the Misuse of Drugs Act 1971 which specifies drugs which are subject to control as Class B drugs under that Act. The ACMD report, “
Consideration of the naphthylpyrovalerone analogues and related compounds” ostensibly provides the rationale.