When it comes to the bottom line, marketing can be every bit as important as R&D. A company may develop a great drug, but that drug could become either a blockbuster with the right advertising approach--or wither from lack of marketing support. Here's a list of the thirteen Big Pharma companies ranked by their 2007 advertising budgets. We analyzed that data, plus company financial documents and press releases, past articles and other media coverage. The result: A quick look at each of these companies' recent ad strategies--and the results they achieved. Report