The Misuse of Drugs Regulations 2001 No. 3998

SCHEDULE 5 U.K. CONTROLLED DRUGS EXCEPTED FROM THE PROHIBITION ON IMPORTATION, EXPORTATION AND POSSESSION AND SUBJECT TO THE REQUIREMENTS OF REGULATIONS 24 AND 26

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. U.K.