Ben Godacre's book Bad Pharma is pretty good. He points out that a large % of this R&D cost is actually marketing. A lot of R&D is also spent on taking existi

Ben Godacre's book Bad Pharma is pretty good. He points out that a large % of this R&D cost is actually marketing. A lot of R&D is also spent on taking existing drugs and subtly changing them so that a non-generic one can be launched. So it's not as cut and dried as it seems.