The 45-year-old returned to Britain on Saturday after more than a month at the clinic in Phoenix Arizona, during which he was treated in intensive care.
And the former Newcastle Tottenham, Everton and Middlesbrough midfielder appears shaken by his latest experience.
"Three doctors didn't think I would make it," Gascoigne said. "It has got to inspire me to never let this happen again.
"I've come through that - death. I was dead. I thought I was on my way out. I looked like a corpse. I was a total wreck.
"I knew I had been in a bad way but I didn't realise it was that bad - I really didn't.
"The medics who have spent their careers treating alcoholics said my detox was the worst they had ever seen.
"I had been pumped with more drugs than any other patient."