Medicines are the core of treatment in biomedicine, as in many other medical traditions. As material things, they have social as well as pharmacological lives, with people and between people. They are tokens of healing and hope, as well as valuable commodities. Each chapter of this book shows drugs in the hands of particular actors: mothers in Manila, villagers in Burkina Faso, women in the Netherlands, consumers in London, market traders in Cameroon, pharmacists in Mexico, injectionists in Uganda, doctors in Sri Lanka, industrialists in India, and policymakers in Geneva. Each example is used to explore a different problem in the study of medicines, such as social efficacy, experiences of control, skepticism and cultural politics, commodification of health, the attraction of technology and the marketing of images and values. The book shows how anthropologists deal with the sociality of medicines, through their ethnography, their theorizing, and their uses of knowledge.