One of my Mother’s relatives did that too - laudanum every night at bedtime so they’d sleep. I wonder why they had drug problems when they grew up???
Mexicans are smarter. They boil head lettuce in big pot of water and pour it cooled over baby as last rinse in bedtime bath. No it is not the bath. I have seen it work myself.
I grew up with a boy whose parents gave him laudanum not only at bedtime. He did become a drug addict and the most obnoxious person ever. When he was in his late twenties, he killed his mom and set the apartment on fire. Soon after he was released from jail, he died of a drug overdose. The world is a much safer place now.