In the United Kingdom the Home Office has brought in an amendment to the Misuse of Drugs Regulations 2001 which moves ketamine from Part 1 of Schedule 4 to the 2001 Regulations to Schedule 2. This change takes effect from 30th November 2015. Further details of the requirements for each of the schedules of controlled drugs can be found in the BSAVA Medicines Guide.
Information from the Home Office on other amendments to the Misuse of Drugs Regulations 2001, including the requirement to include a RCVS number on veterinary prescriptions for Schedule 2 and 3 drugs coming into force on 1 July 2015, can be accessed on the Home Office website.