Johnson & Johnson topped IDEA Pharma's third annual Productive Innovation Index, which seeks to rank drugmakers by their ability to launch innovative products. J&J's rank can be attributed to the commercialization of prostate cancer treatment Zytiga, or abiraterone, IDEA CEO Mike Rea said. Amgen, last year's No. 1, was second, followed by Roche. Rounding out the top 10 were Merck & Co., Sanofi, Eli Lilly & Co., Novartis, GlaxoSmithKline, Bristol-Myers Squibb and Abbott.