How does Hong Kong’s poison schedule system work?

Hong Kong’s Poisons List system is established under the Pharmacy and Poisons Regulations (Cap. 138A) and is central to the classification and management of medicines. The Poisons List appears in Schedule 10 to the Regulations, defines specified chemical substances or medicinal ingredients as poisons, and divides them into 2 main parts: Part I and Part II. Part I poisons carry higher potential risks, and their sale is strictly controlled. Part I poisons are further divided into 3 subdivisions: A, B and C. Subdivision A poisons, such as potent antibiotics and psychiatric medicines, may be sold only at a registered pharmacy under the supervision of a registered pharmacist and on a doctor’s prescription. Subdivision B poisons must also be sold at a pharmacy under a pharmacist’s supervision, but in some circumstances no prescription is required. Subdivision C poisons may be sold at pharmacies or licensed medicine shops (Listed Sellers of Poisons). Part II poisons carry relatively lower risks and can generally be sold at various retail shops, such as supermarkets, without pharmacist supervision. Through detailed classification, this system ensures that high-risk medicines are used under professional guidance while making commonly used medicines accessible to the public.