The 'Dogville' director told Politiken that he is now clean and regularly attends Alcoholics Anonymous meetings.
In his first major interview since a self-imposed vow of silence following his 2011 comments where he expressed empathy with Adolf Hitler, the 58-year-old director admitted that almost all his films were written under influence, reported the Guardian newspaper.
The director said he felt his drinking helped him enter a "parallel world" and feared that coming clean may deprive him of that creative freedom.
"I don't know if I can make any more films, and that worries me. There is no creative expression of artistic value that has ever been produced by ex-drunkards and ex-drug-addicts. Who the hell would bother with a Rolling Stones without booze or with a Jimi Hendrix without heroin?," he said.
Over the past year, Von Trier released two-part sex odyssey 'Nymphomaniac', the script for which he said had been written sober and taken 18 months. He said the screenplay for Dogville, meanwhile, had been completed during a 12-day drug binge.