The RX Factor by J. Thomas Shaw certainly qualifies. There is certainly enough suspense and enough murders and assassinations to qualify it as a thriller. In addition there is a lot of corporate and government malfeasance.
Dr Ryan Mathews discovered a cure for ovarian cancer. His company did not have the resources to do the human testing so he sold out to a large pharmaceutical company. Human testing commenced and the results were not good - it didn't work. Ryan's wife came down with ovarian cancer and she was part of the human testing. When the testing was canceled Ryan stole the last two doses his wife required. He was caught and fired from the large pharmaceutical. All of the tests indicated his wife was going to die within months so the decision was made to move to the Bahamas for the last few months of her life. His wife and children were killed in a plane crash on the way to the Bahamas and Ryan spent the next few years drinking in paradise. One day Ryan met another medical researcher there to spend some time with her aunt and uncle. When her relatives ship was blown up Ryan partnered with her to find out what was going on and the adventure began. Many murders and attempted murders in addition to many surprises. It came to Ryan's attention that his drug had worked and the results had been tampered with. But why - the big pharmaceuticals don't want to cure people. People who are well don't buy drugs. More adventures and murders along the way and an ending that unearths an even more sinister plot.
A really great read that I had trouble putting down and the ending was a shocker.
Cross Posted At The Moderate Voice
I received a review copy of this book from the publisher.