Many children are being forced to live in dirty and even dangerous surroundings and lack many essentials including having enough to eat and clean clothes to wear because the household money is frittered away on booze, the charity warned.
My dad has been drinking and taking drugs a lot recently - it's ruining our family.
He gets angry when he has been drinking so he says nasty things to us like we are stupid and worthless. I'm finding it difficult to deal with because underneath it all I know he's a really good dad.
The emotional trauma of their parents' substance abuse combined with their chaotic home lives is driving many children to depression, self harm and even suicidal thoughts, the NSPCC said.