The United Kingdom Misuse of Drugs Act 1971 aimed to control the possession and supply of numerous listed drugs and drug-like substances as a controlled substance. The act allowed and regulated the use of some Controlled Drugs (designated CD) by various classes of persons (e.g. doctors) acting in their professional capacity. In clinical practice, this mostly applies to the use of strong opiates for pain management and some amphetamine-like stimulants used for Attention-deficit hyperactivity disorder; both of which are regulated under Schedule 2. The Royal Pharmaceutical Society maintains a live database of the legal classification of medicines. Schedules Special responsibilities are placed upon pharmaceutical wholesalers, pharmacies and doctors in the stocking, distribution, issuing of prescriptions, supply and disposal of items listed under the first three of the schedules. The regulations have been further tightened since Dr. Harold Shipman used diamorphine to murder hundreds of his patients during the late 20th century. Schedule 1 - CD Lic Drugs which are not used medically, and thus their possession and supply is prohibited; e.g. DMT and LSD except when licensed by the Home Office to carry out research. Schedule 2 - CD Substances subject to the full controlled drug requirements; e.g. Cannabis, diamorphine (heroin), pethidine, cocaine, methadone, methylphenidate, dextroamphetamine, fentanyl and oxycodone. Under the Act, a prescription for these drugs need to show full details including the form and strength of the preparation, with the total quantity written out in both words and figures. It is an offence for a doctor to issue an incomplete prescription or for a pharmacist to dispense a controlled drug unless all the required details are given. It is the prescriber's responsibility to minimize the risk of dependence or misuse by ensuring that such drugs are not started for a particular patient without good cause, that the dose is not increased to the point where dependency is more likely, and to avoid being an unwitting source of supply for addicts. The quantities of controlled drugs prescribed should match the likely needs of the patients until the next clinical review and prescription forms should be secured against theft. Requirements for safe custody in pharmacies apply to all Sch 2 Controlled Drugs except quinalbarbitone. The safe custody requirements ensures that pharmacists and doctors holding stock of controlled drugs must store them in securely fixed double-locked steel safety cabinets and maintain a written register, which must be bound and contain separate