Understanding how drugs are bought and paid for has always been a bit complicated. People used to say that pharma had two customers-physicians and patients. Only one of them used the drug, and neither of them knew the price. My, how times have changed. Now the industry has so many customers, it needs to stop and get to know them all over again. And that's at a time when drugs worth tens of billions of dollars are going off patent. To map pharma's shifting landscape, Pharm Exec convened a group of top market researchers to discuss the issues shaping an evolving industry. Topics ranged far and wide, from the advent of Medicare Part D, to the new focus on adherence, the role of international markets, even the brave new world of marketing to seniors' children.