These Regulations amend the Misuse of Drugs Regulations 2001 by adding two substances to paragraph 1 of Schedule 2 (controlled drugs subject to the requirements of regulations 14, 15, 16, 18, 19, 20, 21, 23, 26 and 27) two substances to Part I of Schedule 4 (controlled drugs subject to the requirements of regulations 22, 23, 26 and 27) and four substances to Part II of Schedule 4 (controlled drugs excepted from the prohibition on possession when in the form of a medicinal product; excluded from the application of offences arising from the prohibition on importation and exportation when imported or exported in the form of a medicinal product by any person for administration to himself; and subject to the requirements of regulations 22, 23, 26 and 27).