Acetaminophen, sold under the brand name Tylenol, is generally considered the safest over-the-counter pain reliever and fever reducer to use during pregnancy, according to the FDA and ACOG. It has decades of use in pregnancy and is often recommended for headaches, muscle aches, and fever when used at the labeled dose, for the shortest time needed. As with any medication in pregnancy, the right approach is to use the lowest effective dose for the shortest duration and to check with your provider, especially if you need it regularly.

Why Acetaminophen Is the Preferred Option

Unlike NSAIDs (ibuprofen, naproxen, aspirin at higher doses), acetaminophen does not carry the same known risks to fetal kidney function or, in later pregnancy, to the fetal heart and ductus arteriosus. For this reason, acetaminophen has long been the first-choice pain and fever medication across all three trimesters when treatment is needed. Untreated fever in pregnancy is not risk-free either; persistent high fever, particularly in the first trimester, has been linked to complications, so treating a real fever is generally considered better than leaving it unaddressed.

What the Acetaminophen and Neurodevelopment Debate Is About

In recent years, some observational studies have raised the question of whether acetaminophen exposure in pregnancy might be associated with neurodevelopmental conditions such as autism spectrum disorder or ADHD. This became a widely discussed topic in the media in 2025, when federal health officials publicly highlighted the possible association. However, ACOG, the American Academy of Pediatrics, and independent researchers have pointed out that observational studies of this kind cannot establish cause and effect, because they cannot fully separate the effect of the medication from the effect of the illness or fever being treated, or from shared genetic and family factors. Sibling-comparison studies, which control for many of these confounders, generally have not found a causal link. The evidence as a whole remains inconclusive, and major medical organizations have not changed their guidance: acetaminophen, used appropriately and only when needed, continues to be considered an appropriate option in pregnancy. If this topic is a source of anxiety for you, it is worth discussing directly with your OB-GYN or midwife, who can weigh your individual situation.

How to Use It Safely

Follow the dose printed on the product label, and do not combine multiple products that each contain acetaminophen (many cold, flu, and sleep medications include it, which can lead to accidentally exceeding the recommended amount). Space doses as directed and avoid alcohol while taking it, since both acetaminophen and alcohol are processed by the liver. If you need it for more than a few days in a row, or if pain or fever is not improving, contact your provider rather than continuing to self-treat.

What to Ask Your Doctor

• Is acetaminophen appropriate for the specific symptom I'm treating, or is there a non-medication option to try first?
• How often and for how long is it reasonable to use it during my pregnancy?
• Are there other medications I'm taking, prescription or over-the-counter, that also contain acetaminophen?
• What symptoms would mean I should stop self-treating and be seen instead?

Medications Generally Avoided in Pregnancy

For context, some common pain relievers are generally avoided, particularly later in pregnancy. NSAIDs (ibuprofen, naproxen) are typically avoided starting around 20 weeks and are not recommended in the third trimester without specific provider guidance. Aspirin at full pain-relief doses is also generally avoided, though your provider may prescribe low-dose aspirin for specific pregnancy indications, which is a different use entirely. Never start, stop, or substitute a medication based on general information alone; your provider knows your full history.

When to Seek Medical Care

Bottom Line

Acetaminophen remains the pain and fever medication most commonly recommended in pregnancy, and current evidence does not establish that it causes harm when used as directed. Like any medication in pregnancy, the goal is thoughtful, minimal use, at the lowest dose for the shortest time, in partnership with your provider.