In a Feb. 8, 2018, email obtained by The Epoch Times, Rachel Weinstein, director of epidemiology at Johnson & Johnson subsidiary Janssen, wrote, "The weight of evidence is starting to feel heavy to me."

Weinstein was emailing Jesse Berlin, Johnson & Johnson's global head of epidemiology, about a review that concluded that nine studies suggested that use of acetaminophen—the active ingredient in Tylenol—by pregnant women was linked to autism and other neurodevelopmental issues in the women's children.

Weinstein said that Janssen had been discussing with a neurologist about how acetaminophen could be beneficial.

"But now we've added the studies in prenatal exposure and neurodev [sic] outcome," she said.

Berlin wrote that he read the review and that "there appears to be some specificity of the association." While he took issue with how some papers did not analyze other drugs, "at least one study looked separately at specific indications and the association didn't go away," he said.