# The Misuse of Drugs Regulations 2001, Paragraph 4


Any preparation of dextropropoxyphene, being a preparation designed for oral administration, containing not more than 135 milligrams of dextropropoxyphene (calculated as base) per dosage unit or with a total concentration of not more than 2.5% (calculated as base) in undivided preparations.

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Source: https://www.legislation.gov.uk/uksi/2001/3998/schedule/5/paragraph/4 (the official version)
Page: https://openlegislation.uk/misuse-of-drugs-regulations-2001/schedule-5/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.