The author and broadcaster said he indulged in "15 years of pretty chronic cocaine taking" and said it was a "wonderful drug to calm me down".
In the interview, to be broadcast on the Sky Arts programme In Confidence in June, he also admitted to being psychologically addicted to the drug.
He said: "There were 15 years of pretty chronic cocaine taking. In my most hyper frames of mind, I found it was a wonderful drug to take to calm me down.
"I tended to take it alone at home and play word games, mind spinning. I'd do very difficult crosswords, I would spend hours on these."
He added: "I found it extremely east to stop, but it took me a very long time to get to a position where I was ready to."
The broadcaster also talked about the pressures of fame, saying he found it "exhausting".
He said: "They want an appearance, a quote, a tweet, something ... They want to touch the hem of the fame, not the hem of the person.
"It's the scale of it ... so you resort to not travelling on the Tube or walking round the street any more and going in a big car with a driver.
"And people think, "Oh, he thinks he's so grand, doesn't he?' Well, no. I'd rather walk but sometimes I just can't."
Earlier this year Fry enraged feminists with a bizarre outburst in which he claimed that women are incapable of enjoying sex.
Tracey Emin, the artist, was also interviewed for the programme, and defended her artwork, claiming it took more thought than some people believed.
She said: "If I just went found vomiting all the time and s******* everywhere and saying it's art, it wouldn't be. But the fact that I actually collate, I edit, I curate, I think about it, makes it art."
http://www.telegraph.co.uk/news/celebri ... words.html
Crosswords - just say NO!
