Tylenol and Autism Study: Is Tylenol Linked to Autism? [2025 Study]

What Is Autism Spectrum Disorder (ASD)?

Autism spectrum disorder is a term used to describe a range of complex neurodevelopmental conditions that share similar features related to challenges in social interaction, communication difficulties, and restricted or repetitive behaviors.

Autism spectrum disorder got its name because it encompasses a broad spectrum of symptoms and severity levels.

Some individuals with autism spectrum disorder may have exceptional skills in certain areas, such as music, math, or art, while facing challenges in other aspects of daily life.

The signs and symptoms of autism spectrum disorder typically appear during early childhood and can vary widely among individuals. They may include:

• Impairments in social interaction: Difficulty with eye contact, limited understanding of nonverbal cues, challenges in developing and maintaining relationships, and a lack of social reciprocity.
• Communication difficulties: Delayed or impaired language development, repetitive language patterns, difficulty initiating or sustaining conversations, and a tendency to take language literally.
• Restricted interests and repetitive behaviors: Preoccupation with specific topics, inflexible adherence to routines, repetitive movements (e.g., hand flapping, rocking), sensory sensitivities, and resistance to change.

The exact causes of ASD remain unknown, but research suggests a combination of genetic and environmental factors.

Genetic predisposition may play a significant role, as specific genes have been associated with increased susceptibility to ASD.

However, genetic factors alone do not account for all cases, indicating that environmental influences may also contribute to the development of ASD.

How Does Tylenol (Acetaminophen) Exposure Cause Autism?

Tylenol (acetaminophen) is an analgesic (pain reliever) and antipyretic (fever reducer).

It works by inhibiting the production of prostaglandins, which are involved in inflammation and pain perception.

However, it is still a medical mystery how acetaminophen relieves pain and fever.

Previous studies suggested that the use of acetaminophen was safe for everyone, even pregnant women.

Unfortunately, there has been discussion about a potential link between prenatal acetaminophen exposure and an increased risk of autism in recent years.

Several observational studies reported that using acetaminophen during pregnancy can severely impact fetal development and interfere with neurodevelopmental processes, particularly social interactions.

These studies suggest that acetaminophen may cause children to develop autism spectrum disorder (ASD), attention deficit hyperactivity disorder (ADHD), or other neurodevelopmental disorders.

Specifically, the results of these studies suggest that prenatal exposure to acetaminophen can disrupt neurotransmitter and hormonal systems in the developing fetus, leading to an increased risk of developmental delays, autism, or ADHD.

New Studies Link Tylenol to Autism Spectrum Disorder (ASD), Prompting Tylenol Autism Lawsuits

New studies have led to a surge in Tylenol autism cases.

Families affected by the complex developmental disorder have filed acetaminophen lawsuits against Johnson & Johnson, the pharmaceutical company that produces Tylenol.

Generic acetaminophen makers of generic acetaminophen products will also likely face similar legal claims.

These Tylenol lawsuits allege that the company failed to adequately warn pregnant women about the potential risks of Tylenol use during pregnancy.

Tylenol plaintiffs claim that if they had been made aware of the potential link between Tylenol and ASD, they would have made different decisions regarding pain relief during pregnancy.

The lawsuits seek compensation for the financial burdens, emotional distress, and lifelong care requirements of raising a child with autism.

Here are some studies with scientific evidence linking Tylenol and autism.

American Journal of Epidemiology Study (2018)

A 2018 study entitled “Prenatal Exposure to Acetaminophen and Risk for Attention Deficit Hyperactivity Disorder and Autistic Spectrum Disorder: A Systematic Review, Meta-Analysis, and Meta-Regression Analysis of Cohort Studies” examined the accumulating evidence of acetaminophen’s neuro-disruptive properties.

Researchers analyzed data from 132,738 pairs of mothers and children over 3 to 11 years.

They concluded that prenatal acetaminophen exposure was associated with an increased risk for autism spectrum disorder and attention deficit hyperactivity disorder.

While the results were statistically significant and concerning, researchers noted that further prospective studies are needed to confirm the findings and reduce bias.

Johns Hopkins University Study (2019)

In a 2019 Johns Hopkins University study, researchers sought an association between cord plasma biomarkers of in-utero acetaminophen exposure and the risk of childhood autism spectrum disorder and attention deficit hyperactivity disorder.

They studied 996 mother and infant pairs from the Boston Birth Cohort, where umbilical cord blood samples were collected at birth.

The researchers found the following results:

• 257 (25.8%) children had ADHD.
• 66 (6.6%) children had ASD.
• 42 (4.2%) children have had ADHD and ASD.
• 304 (30.5%) children had other developmental delays.
• 327 (32.8%) children were neurotypical.

Their study supported the hypothesis that prenatal acetaminophen exposure increases the risk of childhood ASD, ADHD, and other neurodevelopmental disorders.

European Birth Cohort Study in the National Libraries of Medicine (2021)

A 2021 collaborative study of six European population-based birth cohorts examined 73,881 mother and child pairs, assessing prenatal and postnatal acetaminophen exposure using maternal questionnaires and interviews.

The study found adverse neurodevelopmental outcomes for children with prenatal exposure to acetaminophen.

These children are 19% and 21% more likely to develop borderline or clinical autism spectrum conditions and ADHD, respectively. Additionally, boys were more likely to be affected than girls.

Meanwhile, postnatal exposure to acetaminophen had no significant effect on the children studied.

This study supported previous studies, and the researchers supported pregnant women and their partners in being aware of the potential and long-term risk factors associated with prenatal exposure to acetaminophen.

Nature Reviews Endocrinology Study (2021)

In 2021, 91 scientists, clinicians, and other public health professionals worldwide published a consensus statement in the Nature Reviews Endocrinology medical journal.

They outlined several experimental and epidemiological studies that link prenatal exposure to acetaminophen or paracetamol and the increased risk of neurodevelopmental, reproductive, and urogenital disorders.

These medical experts warn pregnant women and other healthcare professionals about the potential hazards of acetaminophen to child development, urging them to consider alternatives.

They suggest pregnant women avoid taking acetaminophen or use the lowest effective dose for the shortest necessary time.

Systematic Review of European and Canadian Birth Cohorts (2022)

In a 2022 review, researchers looked into 16 high-quality papers from observational studies examining various cohorts, including the following:

• Boston Birth Cohort
• Spanish Birth Cohort
• Danish National Birth Cohort
• Ontario Birth Study
• Nurses’ Health Study II Cohort

All studies found a link between acetaminophen use and adverse neurodevelopmental outcomes, such as:

• Autism spectrum disorder (ASD)
• Intelligent quotient (IQ)
• Attention deficit hyperactivity disorder (ADHD)
• Isolated language, attention, and executive function
• Communication, behavior, and psychomotor development

The review also found a stronger association between neurodevelopmental disorders and the increased dosage, frequency, and long-term use of acetaminophen.

How Do I File a Tylenol Autism Lawsuit?

Tylenol autism lawsuits are still in their early stages.

Pending and new Tylenol autism cases are consolidated into a Tylenol Autism multidistrict litigation (MDL).

Tylenol autism MDL judge Denise L. Cote oversees the proceedings.

If you or your partner used Tylenol or acetaminophen products significantly during pregnancy and your child has an ASD or ADHD diagnosis, you may be entitled to financial compensation.

Experienced Tylenol Autism Lawyers can help assess your specific case and guide you through the legal process.

Gathering Evidence For A Tylenol Autism Lawsuit

Gathering evidence that verifies your case for prenatal Acetaminophen exposure is crucial.

It must be proven that Tylenol or a generic equivalent was taken during pregnancy, and that your child was subsequently diagnosed with a neurological disorder related to documentary and scientific evidence.

Evidence for a Tylenol Lawsuit may include:

• Medical records on Tylenol usage during pregnancy (if available)
• Receipts for purchase of Acetaminophen
• Medical records indicating that your child was diagnosed with neurodevelopmental disorders related to Acetaminophen exposure
• Records from your child’s therapist or psychiatrist if necessary
• Any notes from doctors or healthcare professionals about Tylenol use during pregnancy

What Damages Can You Recover in Acetaminophen Autism Lawsuits?

Assessing Damages means collecting information and calculating any and all losses associated with your case, economic and non-economic.

Various damages may be available to injured parties in a Tylenol autism lawsuit, depending on the jurisdiction and the facts of your Tylenol lawsuit.

Generally, these damages may include:

• Past and future medical expenses
• Lost wages or earning capacity for parents and caregivers
• Pain and suffering
• Mental anguish
• Punitive damages (in some cases)

It is essential to understand that you may be entitled to compensation if acetaminophen exposure was a factor in your child’s ASD or ADHD diagnosis. Qualified Tylenol attorneys can help ensure that you are fully compensated.

How Can a Lawyer Help With Your Case?

Our team of experienced Tylenol Autism Lawyers are reviewing Tylenol Autism Lawsuits daily and verifying potential claimants’ eligibility to join the litigation.

Our Tylenol Lawyers can analyze your case, gather evidence, evaluate your damages, negotiate with the other party and insurance companies, and ensure you receive fair compensation for any harm caused by acetaminophen exposure during pregnancy.

They can also represent you in court and guide you through the legal process.

Additionally, they can provide legal advice to help you determine the best course of action for your case and represent your interests during negotiations.

A qualified attorney will also ensure that any settlement you receive is fair and just. Their knowledge and expertise can make a significant difference in the outcome of your case.

TorHoerman Law: Your Tylenol Autism Lawyers

TorHoerman Law has achieved more than $4 billion in verdicts and negotiated settlements for a variety of personal injury cases.

Our past results afford us recognition as some of the best attorneys in the country.

THL lawyers have put in the work to get justice for people around the country injured by dangerous drugs and defective medical devices.

We are focused solely on competent legal representation, relationship building, and full financial recovery for your serious injuries.

Our law firm offers free, no-obligation case consultations for all potential clients.

If you or a loved one used Tylenol or Acetaminophen products during pregnancy, and your child was subsequently diagnosed with Autism Spectrum Disorder (ASD), you may be eligible to file a Tylenol Autism Lawsuit.

Contact TorHoerman Law today to learn more about your legal options, or use the chatbot on this page to see if you qualify for a Tylenol Autism Lawsuit instantly.

TorHoerman Law: Your Tylenol Autism Lawyers