They call that 'Swapping the witch for the bitch'. Get them off the alcohol only to get them addicted to a much more dangerous substance, Ketamine. That's a good idea. NOT. "Ohh, but we regulate the Ketamine supply..." So, when 'Johnny's' supply is regulated/restricted he goes for the next most available substance, heroin. Yea, great idea, just swap the witch for the bitch.