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April 28, 2000: Merck Advises Sales Reps on How to Deal with Questions about VIGOR Study

Merck sends all of its sales representatives a “Cardiovascular Card,” a tri-fold pamphlet on the safety of Vioxx, so they “are well prepared to respond to questions about the cardiovascular effects of Vioxx.” Since the announcement (see March 27, 2000) of the VIGOR study results, physicians have been asking the representatives whether Vioxx causes heart problems. The pamphlet contains a table of data appearing to indicate that patients on Vioxx are 11 times less likely to die than patients on standard anti-inflammatory drugs, and 8 times less likely to die from heart attacks and strokes. Another section displays data showing that Vioxx patients are half as likely to suffer heart attacks as patients who receive a placebo. The risk for patients on other anti-inflammatory drugs appears to be identical. [Merck, 4/28/2000 pdf file] But the pamphlet is based on the combined data of several disparate studies, conducted before the drug’s approval. None of the studies were designed to test the cardiovascular safety of the drug. An FDA medical reviewer later tells the staff of a congressional committee that the relevance of those studies to the question of Vioxx’s effects on the heart is “nonexistent.” Furthermore, the reviewer says it would be “ridiculous” and “scientifically inappropriate” to use the pamphlet as evidence of the drug’s safety. [Office of Representative Henry A. Waxman, 5/5/2005, pp. 16-19 pdf file]

Entity Tags: Merck, VIGOR

Timeline Tags: US Health Care

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