Knowing some basic principles about medicines would help patients to understand drug therapy and to help and encourage them to use it well. These principles relate to the categories and names of drugs, their different uses, how they reach the site of action (absorption, distribution, fate), how they produce their effects, both beneficial and harmful, the time courses of drug actions, how the pattern and intensity of the effects of a drug depend on dose and timing, drug interactions, how drug effects are demonstrated and investigated and sources of information and their trustworthiness.
These basic principles are an essential part of health literacy and understanding them would enable individuals to comprehend better the information that they are likely to receive about medicines that they will take. Different populations need different types of education. For schoolchildren, the principles could fit into biology and domestic science teaching, starting in the later years of primary school or early in secondary school. A teaching package would also be needed for their teachers. For adults, web-based learning seems the most practical option. Web-based programmes could be supported by the NHS and professional bodies and through public libraries and local community health services. Specific groups for targeting could include young mothers and carers of chronically ill people. For retired people, one could envisage special programmes, perhaps in collaboration with the University of the Third Age. Conversations between patients and professionals would then become more effective and help shared decision making.