Over the last few years, there has been an enormous increase in the knowledge of attention deficit hyperactivity disorder-related issues. We now know much more about genetics, for instance; however, as we progress it appears that more and more complicated processes are involved. We also have effective protocols and pathways on evidence-based therapies, including protocols from the National Institute for Health and Care Excellence in the UK. Therapists can retrieve information via the internet, and in many countries, protocols and advice are available for school teachers, public health workers, GPs, paediatricians, psychiatrists, nurse practitioners and psychologists. There are also many books and websites with comprehensive advice for parents and patients.