What is the effect to toddler after ingesting the whole-pad of birth control pills?

my nephew age 4 ingest the whole pad of birth control pill of her mom. The kid is doing good except one thing, my nephew displays unacceptable behavior compared to other kids with the same age. Now, his 5 and his teachers reports that he is having difficulty in social relationship with other kids and displays behavior inappropriately. I am very concerned of the after event of that pills incident. Was it the effect then, can anybody share their ideas and knowledge to make things clear. lastly, after ingesting the pills the parents did not bring the kid to the hospital for further observation and monitoring......