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.
More top news
Jamie Harron was arrested in July over an incident in which he said he put his hand on a man's hip to avoid spilling a drink in a bar.
Merrill Lynch has been fined £34.5 million for failing to report 68.5 million transactions, the Financial Conduct Authority has said.
Most people back a change in the law to ban unpaid internships that last for more than four weeks, a new poll suggests.