from highschool to now I've almost certainly had 8-10x more tylenol than anyone else my age has had in their entire lives. I was continually in so much pain I could barely function even with the pills and often mixed painkillers in hopes of even a tiny improvement. any autistic tendencies have existed since long before I had any tylenol and my dad had always been against avoidable meds having barely avoided being a thalidomide baby, which he is still fixated on to this day.