David Horrobin has been called one of the UK's finest original thinkers in medicine. He runs his own drugs company, Laxdale Inc, whose first big product was evening primrose oil - a fatty-acid treatment now used to treat ailments as wide-ranging as premenstrual syndrome, multiple sclerosis and eczema. He is the author or co-author of about 800 publications in scientific literature. Describe The Madness Of Adam And Eve. Schizophrenia and manic-depression played a central role in our evolution as full human beings. These illnesses, far from being disasters, are central to our humanity. How important was the timing of the book? The book links discoveries from several different areas of medicine, psychiatry and evolution. These all had to be made before the ideas could be developed. What issue is playing on your mind at the moment? The appalling way in which we as a society treat people with mental illness. Which book has influenced you most? The Oxford Book Of English Verse. Who in history would you most like to meet? Isaac Newton, to find out just how mentally disturbed he was. Name three buzzwords you hate. Pass. What do you read for fun? Poetry. What was the last novel you read? The Constant Gardener, John le Carre. Do you believe in God? Open-minded. What would you like your epitaph to say? 'A dreamer whose dreams came true.'