March 27, 2000: VIGOR Study Results Announced
Merck issues a press release announcing the results of the VIGOR study (see March 2000) and saying that the study showed patients taking Vioxx experienced fewer gastrointestinal problems than patients on naproxen. Merck also says that “significantly fewer thromboembolic events were observed in patients taking naproxen.” Merck asserts that this was due to “naproxen’s ability to block platelet aggregation,” [Merck, 3/27/2000] a theory for which there is no conclusive evidence. [New York Times, 5/22/2001]