for misuse and therapeutic effectiveness. CD1: cannabis, lysergamide, coca leaf, etc. Use is prohibited except in limited circumstances where a license has been granted. CD2: amphetamine, methadone, morphine, fentanyl, oxycodone, tapentadol, etc. Prescriptions must be handwritten and are only valid for 14 days. Repeat prescriptions are not permitted. Drugs must comply with safe custody and destruction of unsold/unused medication must be witnessed. Must be registered in a Controlled Drugs register. CD3: temazepam, flunitrazepam, etc. As CD2, except witnessed destruction and CD register are not required. CD4: benzodiazepines, e.g. diazepam, nitrazepam, low dose (methyl)phenobarbitone CD5: low-dose codeine, etc. Myanmar (Burma) The regulation of drugs in Burma is governed by the Food and Drug Administration (Burma) and Food and Drug Board of Authority. Norway Medicines in Norway are divided into five groups: Class A Narcotics, sedative-hypnotics, and amphetamines in this class require a special prescription form: morphine and its immediate family, heroin, desomorphine, nicomorphine; codeine and its immediate family, dihydrocodeine, ethylmorphine, nicocodeine; morphine relatives: hydromorphone and oxymorphone; codeine relatives: hydrocodone and oxycodone; synthetic opioids: pethidine, methadone, fentanyl, and levorphanol; various sedative-hypnotics: temazepam, methaqualone, pentobarbital, and secobarbital; various stimulants: amphetamines and methylphenidate; flunitrazepam (moved from class B) Class B Restricted substances which easily lead to addiction like: co-codamol tramadol diazepam nitrazepam all other benzodiazepines (with the exception of temazepam and flunitrazepam) phentermine Class C - All prescription-only substances Class F - Substances and package-sizes not requiring a prescription Unclassifieds - Brands and packages not actively marketed in Norway Philippines The Food and Drug Administration regulates drugs and medical devices in the Philippines. Sri Lanka Prohibited. Brands and packages not actively marketed in Sri Lanka. Switzerland Medicines in Switzerland are regulated by Swissmedic. The country is not part of the European Union, and is regarded by many as one of the easiest places to conduct clinical trials on new drug compounds. There are five categories from A to E to cover different types of delivery category: A: Supply once with a prescription from a doctor or veterinarian B: Supply with a prescription from a doctor or veterinarian C: Supply on technical advice from medical staff D: Supply on technical advice E: Supply without technical advice United Kingdom Medicines for Human Use in the United Kingdom are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA). The availability of drugs is regulated by classification by the MHRA as part of marketing authorisation of a