Using Acetaminophen during pregnancy tied to ADHD risk
February 26, 2014, 12:45 am TWN
WASHINGTON--Acetaminophen, a common pain reliever considered safe for pregnant women, has been linked for the first time to an increased risk of attention deficit and hyperactivity disorder in children, said a study Monday.
More studies are needed to confirm the findings, but experts said the research points to a new potential cause for the worldwide rise in cases of ADHD, a neuro-behavioral condition which has no known cause and affects as many as five percent of U.S. children.
Women who took acetaminophen, also known as paracetamol, while pregnant had a 37-percent higher risk of having a child who would be later given a hospital diagnosis of hyperkinetic disorder, a particularly severe form of ADHD, said the study in Feb. 24 edition of the Journal of the American Medical Association (JAMA) Pediatrics.
Compared to women who did not take acetaminophen while pregnant, women who did also had a 29-percent higher chance of having children who were later prescribed medications for attention deficit hyperactivity disorder, and a 13 percent higher chance of exhibiting ADHD-like behaviors by age seven.
Previous research has suggested that acetaminophen can interfere with normal hormone function and may affect the developing fetal brain. The painkiller has also been linked to a slightly increased risk in boys of cryptorchidism, a condition in which the testicles do not descend.
The latest research was based on survey data on more than 64,000 Danish women from 1996 to 2002.
More than half said they took acetaminophen at least once during pregnancy.
Outside experts cautioned that the observational findings do not prove that taking Tylenol-like pain relievers causes ADHD, only that a preliminary link between the two has appeared and would need to be confirmed by further research.