Should you avoid Tylenol in pregnancy?

Aviva RommMD · family physician (NPPES taxonomy 207Q00000X, MA licence 253326 and NY licence 9040902; Yale MD awarded 1 Sep 2009, verified in Yale's own thesis repository; stated board certification not confirmed against ABFM) · midwife, apprenticeship-trained, approx. 25 years, current standing not established · herbalist, past president of the American Herbalists Guild and former Medical Director of the American Herbal Pharmacopoeia, both confirmed by the organisations themselves

Use it sparingly and only when needed. Do not avoid it at all costs, and do not blame yourself for having used it.

What it rests onShe walks the literature in order and reports what each design can and cannot show: 2018 cohort data raising the alarm, a 2021 Nature Reviews Endocrinology consensus statement supported by 91 researchers recommending avoidance unless prescribed, a 2024 JAMA sibling analysis of nearly 2.5 million Swedish children finding no association and no dose-response once siblings were controlled, and an August 2025 BMC Environmental Health Navigation Guide review of 46 studies in which 27 found associations and the higher-quality studies were more likely to. Against that she sets the risk of the untreated condition, citing an association between untreated high maternal fever and neurodevelopmental disorders, and notes ibuprofen is not recommended in pregnancy. She quotes the FDA Commissioner that the choice belongs with parents and that use remains reasonable in certain scenarios.

Paul Gregory SaladinoMD · physician and animal-based nutrition creator

Acetaminophen should be avoided in pregnancy, labour and the first three years, and doing so could cut autism rates.

What it rests onA metabolic argument plus a reading of the same evidence. His mechanism: acetaminophen clears safely by glucuronidation and sulfation, newborn livers have virtually no glucuronidation capacity in the first weeks, so exposure is shunted to the cytochrome P450 route that produces NAPQI, depletes glutathione and damages mitochondria, including in the developing brain. His reading of the sibling study is that its design excludes the vulnerable: 'all this proves is that among families with NO genetic susceptibility to acetaminophen toxicity, the drug doesn't cause autism.' He cites the same 2025 46-study review Romm cites, for the proposition that stronger designs found stronger associations. He labels his conclusion a hypothesis and calls it very controversial.