>As the 63-year-old noted, both father and son recently made a decision to get sober together. "We both decided that we were going to stop drinking, so it was a situation where you know we both went cold turkey," he shared.
Alcohol is one of the few drugs that you can't safely quit cold turkey. Opiate withdrawal, for example, will just make you sick, but stopping booze cold turkey, if you're a heavy drinker, can actually be fatal:
https://en.wikipedia.org/wiki/Alcohol_withdrawal_syndrome
I've had alcoholic family members that had to be hospitalized for unrelated stuff, and they were monitored by hospital staff for signs of dangerous withdrawal symptoms during their stay, and ended having paranoid delusions and hallucinations.