2/8. The Colour-Coded Prescription. For decades scientists have told us that "race" isn't a biological reality, yet the American authorities have just licensed a heart drug to be used solely on African-Americans. It's the first racially specific medicine, and it's likely that Britain will soon be using different drugs for different races too. Kenan Malik asks what the medical and social conseguences will be if the age of colour-blind medicine is now over. Producer Ingrid Hassler