It is looking like Tylenol may be the cause in the spikes in Autism. In animals Tylenol is neurotic. We know it crosses the placental barrier and that unborn babies livers are not fully developed. So it MAY not be safe in pregnancy. That is bad because Tylenol is recommended to pregnant women for pain. More information is about to be released. If you have a loved one that is pregnant tell them to avoid Tylenol for the time being at least.