Federal drug regulators believe that a contaminant detected in a crucial blood thinner that has caused 81 deaths was deliberately added.“F.D.A.’s working hypothesis is that this was intentional contamination, but this is not yet proven,” Dr. Janet Woodcock, director of the agency’s drug center, told the House Subcommittee on Oversight and Investigations in written testimony on Tuesday.
Some heparin batches made by Baxter International consisted of more than 30 percent of the contaminant, “and it does strain one’s credulity to suggest that might have been done accidentally,” Dr. Woodcock said.
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