A & E Services Ambulance Services Blood donors Carers Children in Hospital Clinical trials Community Health Complaints Doctors G.U.M. Clinics General Practitioners Health Care Abroad Health Information Serv. Hospitals Nurses Prescriptions Qualifications R & D Self Help Groups Waiting for treatment   Drugs are divided into three categories: General Sale List (GSL) medicines such as paracetamol (in certain size packs) which can be sold over the counter of ordinary shops. Pharmacy (P) medicines which can be sold only under the supervision of a pharmacist in a pharmacy. Prescription only medicines (POM) which can be supplied only against a doctor's prescription.     Copyright © 1998, NHS