In 2005, over 28 billion doses of Tylenol were taken in the U.S. alone. Tylenol (also known as acetaminophen and paracetamol) has a number of known potential side effects including nausea, vomiting and liver damage.
A study from Norway examined children born to mothers taking Tylenol/Paracetamol during pregnancy. At three years of age, “children exposed to prenatal paracetamol for more than 28 days had poorer gross motor development, communication, externalizing behavior, internalizing behavior, and higher activity levels. Children exposed prenatally to short-term use of paracetamol (1–27 days) also had poorer gross motor outcomes, but the effects were smaller than with long-term use.”
The study concluded “children exposed to long-term use of paracetamol during pregnancy had substantially adverse developmental outcomes at 3 years of age.”