Three million people reviewed: the paracetamol and autism question, answered
What happened
A study published today has taken a fresh look at one of the most frightening claims made about medicine in pregnancy. The claim is that taking paracetamol while pregnant raises a child's chance of having autism or attention deficit hyperactivity disorder, usually shortened to ADHD. It has been repeated in headlines around the world. It has worried a great many people, including people who were already pregnant when they read it. The new work appears in the journal Developmental Medicine & Child Neurology on 23 September 2026. It was led by Hoda Tayebi Hillali at the University of Santiago de Compostela in Spain. The team did not run a new trial. Instead they gathered up the big reviews that already existed and tested them against one another. Scientists call this an umbrella review, or a meta-meta-analysis. In plain English, it is a review of reviews. Seven earlier meta-analyses went into it. Between them, they covered more than three million people. When the team looked at everything together, without filtering, they did see a small link between paracetamol use in pregnancy and both autism and ADHD. But when they narrowed the pool to only the higher-quality studies, that link shrank almost to nothing. Their conclusion was direct. There is no robust evidence that paracetamol taken in pregnancy causes autism or ADHD. "Our findings show that the apparent association between prenatal paracetamol exposure and autism or ADHD weakens as methodological quality improves," the lead author said.
Why this matters
Paracetamol is not one painkiller among many in pregnancy. For most people it is the only one usually recommended. The NHS is plain about it: "If you're pregnant, paracetamol is usually the best painkiller to use. It's commonly taken during pregnancy and does not harm your baby." That is why a scary headline about it does real damage. Fear does not stay on the page. It changes what people do. Some people stop taking anything at all and put up with pain that could be treated. Some let a high temperature run its course, and a fever in pregnancy is not a harmless thing. Some quietly switch to ibuprofen or aspirin instead, which is generally not advised in pregnancy without medical advice. And many people who have already taken paracetamol, sometimes years ago, are left carrying guilt they never needed to carry. That is the practical value of a study like this one. It does not tell people to take more of anything. It tells them that the thing they were frightened of does not hold up when the evidence is examined carefully.
What the evidence actually says
It helps to know what kind of evidence this is, and what it can and cannot show. Almost all the studies underneath this review are observational. That means researchers watched what happened in the real world. They did not, and could not, randomly assign some pregnant people to take paracetamol and others not to. That would be neither possible nor ethical. Observational studies can show that two things happen together. They cannot by themselves show that one caused the other. This matters here, because people who take a lot of paracetamol in pregnancy differ from people who take none. They may have more infections, more pain, more long-term conditions, or a family history of autism or ADHD. Any of those things could explain a small link without paracetamol doing anything at all. The most telling detail in the new review is the pattern. The weaker the study, the bigger the apparent risk. The stronger the study, the smaller it got, until it sat at roughly zero. That is a well-known fingerprint of bias rather than a real effect. If something genuinely causes harm, better studies usually show it more clearly, not less. Being fair about the limits: an umbrella review can only be as good as the studies inside it, and no study can ever prove a risk is exactly zero. This is not a green light to take unlimited amounts of anything. It is good evidence that ordinary, sensible use is not the danger it was made out to be.
Qurexa perspective
Pharmacy teams are often the first people asked about this sort of story, and usually within hours of it appearing. We see it in our own work. Qurexa delivers prescriptions and supports medication routines for people across Lincolnshire, and a headline about a common medicine can prompt a wave of worried questions in a single afternoon. One thing we would gently say: a pharmacist is free to talk to, and you usually do not need an appointment. If a news story has made you anxious about something you are taking, that conversation costs you nothing and takes a few minutes. If you are pregnant and you have a repeat prescription, it is also worth telling your pharmacy team, so they can check everything on your list together rather than one item at a time.
Practical advice
If you are pregnant, or trying to be, here is what this study does and does not change. - Do not stop a medicine because of a headline. Ask first. Stopping suddenly can cause its own problems. - Paracetamol remains the painkiller the NHS usually recommends in pregnancy. - Take the lowest dose that works, for the shortest time that works. That is sound advice for any painkiller, and it has not changed. - Check the other things in your cupboard. Many cold and flu remedies already contain paracetamol, and it is easy to double up by accident. Read the box. - Do not switch to ibuprofen or aspirin in pregnancy unless a healthcare professional has told you to. - Do not ignore a fever. If you have a high temperature in pregnancy, speak to your midwife, your GP or NHS 111. - If you want detail rather than headlines, ask your midwife or pharmacist about the Best Use of Medicines in Pregnancy (BUMPS) leaflets, which are written for the public. If you already took paracetamol earlier in a pregnancy, this review is reassuring. There is nothing here that suggests you did something wrong.
What to know
A review of seven earlier reviews, covering more than three million people, found that the apparent link between paracetamol in pregnancy and autism or ADHD faded away once weaker studies were set aside. The researchers concluded that the evidence does not support a causal link. Paracetamol is still the painkiller the NHS usually recommends in pregnancy. Untreated pain and untreated fever carry risks of their own, so avoiding treatment out of fear is not a safe alternative. If you are unsure about any medicine in pregnancy, a pharmacist or midwife can talk it through with you. Sources: EurekAlert!/Wiley, "Does paracetamol/acetaminophen use in pregnancy increase the risk of neurodevelopmental disorders in children?", 23 September 2026, https://www.eurekalert.org/news-releases/1144629; Developmental Medicine & Child Neurology, "Does prenatal exposure to paracetamol increase the risk of autism and ADHD? An umbrella review and meta-meta-analysis", 23 September 2026, https://doi.org/10.1111/dmcn.70512; NHS, "Pregnancy, breastfeeding and fertility while taking paracetamol for adults", accessed 23 September 2026, https://www.nhs.uk/medicines/paracetamol-for-adults/pregnancy-breastfeeding-and-fertility-while-taking-paracetamol-for-adults/ This article is for general information and does not replace advice from a doctor, pharmacist, midwife or other qualified healthcare professional.
Related articles
Six hours, not never: the ICU filter notice the MHRA issued today
The UK's medicines and devices regulator has issued a new safety notice to hospitals, and it is about timing. On 13 October 2026 the Medicines and Healthcare p…
Eight pages to a minister: what the data guardian says trust is worth
On 12 October 2026, the government published a letter about who should be trusted with NHS patient data. It was written by Dr Nicola Byrne, the National Data G…
Update: the tests came back, and it was not plague
This is a follow-up to a story we covered on 5 October, when nearly 200 people were being monitored after the death of a laboratory worker in Siberia. There has…