The FDA is signaling that perhaps immediate treatment with acetaminophen is less clearly needed for a low grade fever, especially in pregnancy, unless theres a stronger indication for it., Safer The parent compounds of acetaminophen (US market in 1955 in the US as Tylenol and other products) were first discovered in 1886 (acetanilide) and 1887 (phenacetin). These were the earliest synthetic fever Myth busting, Acetaminophen version. "Avoid Acetaminophen (Tylenol) because it causes glutathione depletion". Truth?? As a pediatrician and ER doctor and as moms we're often asked about this. And we understand why: Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health The Hidden Impact of Acetaminophen Well Rooted