That's interesting. Basically it says that the causation is inverse for ADHD: e.g. parents with ADHD are more likely to take acetaminophen long term and then pa

That's interesting. Basically it says that the causation is inverse for ADHD: e.g. parents with ADHD are more likely to take acetaminophen long term and then pass ADHD to the child genetically, which shows up as a correlation between acetaminophen use during pregnancy and ADHD in the child in an epidemiological study. If you control for it the correlation disappears. However, I don't see how liver damage could lead to paracetamol use.