The U.S. Department of Health and Human Services is planning to release a report that will reportedly link autism and acetaminophen use in pregnancy, according to The Wall Street Journal. The department has confirmed a report is in the works, but has not revealed its conclusions.

Drug maker Kenvue, which sells acetaminophen under the brand name Tylenol, saw its shares slump following the Journal’s report, dropping more than 10% on Friday.

Health Secretary Robert F. Kennedy Jr. ihas made investigating autism a cornerstone of his efforts at the department. According to the Journal, the report will also make a link between folate deficiency and autism. But in statements to other media outlets, an HHS spokesperson said the Journal’s reporting was “speculation.”

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