Why paracetamol (Tylenol) is under scrutiny

Paracetamol — known in the US as acetaminophen and sold under the brand name Tylenol, is one of the most widely used pain relievers in the world. It has long been considered safe, even during pregnancy, when most medications are discouraged.

But in recent weeks, the drug has come under intense scrutiny in the United States after President Donald Trump suggested there could be a connection between its use in pregnancy and autism in children. His remarks, delivered at the memorial service of conservative activist Charlie Kirk, have fueled widespread speculation and concern.

What did Donald Trump say?

During his speech in Arizona, Trump told the crowd:

“I think we found an answer to autism… I think it’s going to be one of the most important news conferences I’ll ever have.”

He added that his administration “won’t let it happen anymore,” implying that new restrictions or guidelines could soon be announced. While Trump did not give details, media reports suggest health officials are preparing to advise pregnant women to limit Tylenol use early in pregnancy.

What is Tylenol used for?

• Brand name: Tylenol in the US, paracetamol in most of the world.
• Primary uses: Pain relief and fever reduction.
• During pregnancy: Sometimes prescribed when fever or pain could pose risks to both mother and child.

Because alternatives like ibuprofen are generally avoided during pregnancy, acetaminophen has been the go-to option for decades.

What is autism?

Autism spectrum disorder (ASD) is a developmental condition that affects how people communicate, interact, and behave.

• Early signs: Reduced eye contact, repetitive movements, or delayed speech.
• Diagnosis: Usually made within the first two years of life.
• Prevalence: The US Centers for Disease Control and Prevention (CDC) estimates 1 in 36 children in the US has been identified with ASD.

Why is Tylenol being linked to autism?

Several studies have looked at whether acetaminophen exposure during pregnancy could affect brain development in the womb.

• Some research: Suggests an increased risk of autism and ADHD in children whose mothers took acetaminophen frequently during pregnancy.
• Other research: Found no clear connection. A major Swedish study of over 2 million children, published in 2024, reported no evidence of higher autism risk from prenatal acetaminophen use.

This conflicting data has left the medical community divided.

What do health authorities say?

• American College of Obstetricians and Gynecologists (ACOG): Maintains there is no solid evidence linking acetaminophen use in moderation to developmental problems.
• Society for Maternal-Fetal Medicine: Reaffirms acetaminophen is safe when needed during pregnancy.
• Kenvue (Tylenol’s manufacturer): Strongly denies any link, warning that discouraging its use could put mothers at risk if untreated pain or fever goes unmanaged.

What happens next?

Reports suggest Health Secretary Robert F. Kennedy Jr. is preparing to formally announce that the government sees a potential link between Tylenol and autism. At the same time, Trump has promised an Oval Office address on autism, raising expectations of new guidelines.

Possible steps under consideration:

• Cautioning pregnant women against routine Tylenol use unless treating fever.
• Launching new studies into the drug’s safety during pregnancy.
• Exploring alternative treatments, including drugs like leucovorin, which some early studies suggest could help treat autism symptoms.

Why this matters

• Public health impact: Paracetamol is one of the most commonly used medications worldwide. Even small changes in guidelines could affect millions of pregnancies.
• Scientific uncertainty: The debate underscores the difficulty of proving causation in conditions like autism, which likely have multiple genetic and environmental factors.
• Risk of misinformation: Experts worry that overstating unproven risks could cause pregnant women to avoid treatment for fevers, which themselves can be dangerous to fetal development.

TL;DR

Donald Trump has suggested a link between Tylenol (paracetamol) use during pregnancy and autism in children, sparking debate. While some studies hint at a connection, major research and medical bodies say no solid evidence exists. US health officials are considering new guidelines, but experts caution against panic, stressing that acetaminophen remains the safest option for pregnant women needing pain or fever relief.