Davina McCall has said she was taken to hospital after overdosing on drugs at the height of her addiction.
The TV presenter, who has previously spoken about her issues with drugs in her early 20s, said she was "so full of self-loathing" at the time and that she took a mix of drugs because she did not want to feel "normal".
According to the Sun on Sunday, McCall told an International Women's Day event: "Drugs took me to a very, very, very dark place and, one night, I overdosed.
"It was very frightening as it was a very gradual overdose.
"I'd had a cocktail of drugs, because I didn't want to feel normal.
"I was constantly trying to escape myself – I was like a piece of fruit rotting from the inside."
Davina McCall poses for photographers upon arrival at the Glamour Woman of the Year Awards in London, Tuesday, June 7, 2016. (Photo by Joel Ryan/Invision/AP)
LONDON, ENGLAND - JUNE 07: Davina McCall attends the Glamour Women of the Year Awards at Berkeley Square Gardens on June 7, 2016 in London, England. (Photo by Fred Duval/FilmMagic)
Davina McCall poses for photographers upon arrival at the BAFTA Television awards in central London, Sunday, May 10, 2015. (Photo by Jonathan Short/Invision/AP)
Davina McCall at the Arqiva BAFTA Television Awards Party at The Grosvenor House Hotel in London on Sunday, May 18, 2014. (Photo by Jon Furniss/Invision /AP Images)
Davina McCall and Naomi Campbell pose for photographers in the winners room at the British Academy Television Awards at a central London venue, Sunday, May 18, 2014. (Photo by Jonathan Short/Invision/AP)
Davina McCall arrives at the BAFTA TV Awards on Sunday, May 27, 2012, in London. (Photo by Jon Furniss/Invision/AP)
LONDON, ENGLAND - FEBRUARY 21: Davina McCall attends the Colgate Total Whole Mouth Health Event at Tate Modern on February 21, 2019 in London, England. (Photo by Jeff Spicer/Getty Images for Colgate)
LONDON, ENGLAND - SEPTEMBER 18: Davina McCall attends Red Magazine's 20th birthday party and launch of Red Smart Women Week at No 11 Carlton House Terrace on September 18, 2018 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)
Television presenter Davina McCall at the Big Feastival at Alex James' farm in Kingham, Oxfordshire. (Photo by Steve Parsons/PA Images via Getty Images)
Davina McCall at the launch of a new water based Sun protection from Garnier Ambre Solaire in Finsbury, central London. (Photo by John Stillwell/PA Images via Getty Images)
LONDON, ENGLAND - APRIL 11: Davina McCall at the launch night of Soho House Television Centre on April 11, 2018 in London, England. (Photo by Mark R. Milan/GC Images)
LONDON, ENGLAND - SEPTEMBER 11: Ellie Goulding (R) representing Centrepoint and Davina McCall representing Action Medical Research (L) attend the BGC Charity Day on September 11, 2017 in Canary Wharf, London, United Kingdom. (Photo by Gareth Cattermole/Getty Images for BGC Partners )
LONDON, ENGLAND - NOVEMBER 19: Davina McCall attends the ITV Gala at London Palladium on November 19, 2015 in London, England. (Photo by Dave J Hogan/Dave J Hogan/Getty Images)
LIVERPOOL, ENGLAND - SEPTEMBER 07: Davina McCall is joined by defending Tour of Britain champion, Sir Bradley Wiggins and fellow Team Sky teammates Ben Swift and Ian Stannard at the first ever Sky Ride Big Bike event in Liverpool. The event took place ahead of the start of the Tour of Britain and saw thousands of Liverpudlians get on their bikes and enjoy a day cycling a traffic- free 8km route which also included some of the Tour of Britain circuit. Sky Ride Liverpool is part of a national campaign from Sky and British Cycling encouraging thousands of people of all ages and abilities to get on a bike and discover the benefits cycling can offer. Find a ride near you at www.goskyride.com on September 7, 2014 in Liverpool, England. (Photo by Shirlaine Forrest/Getty Images for Sky Ride)
LONDON, ENGLAND - AUGUST 29: Davina McCall introduces 'Kaine' to the judges during the live final of 2014's "Got To Dance" at Earls Court on August 29, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)
LONDON, UNITED KINGDOM - JUNE 03: Davina McCall attends the Glamour Women of the Year Awards at Berkeley Square Gardens on June 3, 2014 in London, England. (Photo by Julian Parker/UK Press via Getty Images)
Television presenter Davina McCall and her husband Matthew Robertson arriving at the world premiere of "One Night At McCool's", at the Warner West End cinema, in London's Leicester Square. *26/09/2001....Television presenter Davina McCall and her husband Matthew Robertson. Big Brother presenter Davina McCall has become a mother for the first time by giving birth to a baby girl, her spokeswoman said. The television personality and her 31-year-old husband Matthew Robertson, a presenter on Channel 4's Pet Rescue, have named the 8lb 12oz tot Holly Willow. She was born at their Chiswick home in West London at 10.05pm on Saturday and the natural birth was overseen by two midwives.
Paul Clarke, with hostess Davina McCall , leaving the Channel Four Big Brother house in Bow, east London, after being evicted. Clarke became the seventh contestant to be evicted from the reality TV house. *26/08/01.. Paul Clarke, leaving the Big Brother house. It was announced, Sunday August 26, 2001, that Clarke is jetting off to the sunshine isle of Ibiza after signing up as a guest presenter with Channel 5 programme Exclusive. He will ditch girlfriend Helen Adams for a week to take up with blonde beauty Tess Daly to bring back the hot gossip from the Balearic island.
Celebrity Big Brother 2002 host Davina McCall (far right) with housemates (from left) Les Dennis, Anne Diamond, Melinda Messenger, Sue Perkins and winner Mark Owen at Elstree Studios in Hertfordshire.
TV presenter Davina McCall and her husband Matthew Robertson at The Brit Awards 2002, at London's Earls Court.
Davina McCall and husband Matthew Robertson arrive for the annual National Television Awards at the Royal Albert Hall in central London.
Justine (left) being led away from the Big Brother house at Elstree Studios in Hertfordshire by the show's host Davina McCall after becoming the second person to be evicted from Big Brother 2003.
TV Presenter Davina McCall arrives for the 10th Anniversary National Television Awards 2004, held at the Royal Albert Hall in London.
Nadia Almada (left) with host Davina McCall, poses for photographers after leaving the house as this year's winner during Big Brother 5's grand finale show, at Elstree Studios.
EDITORIAL USE ONLY. NO MERCHANDISING Undated handout picture released today Friday 23 April 2004 of Rebecca Loos (left), and host Davina McCall, appearing on ITV1 dating show 'Love On A Saturday Night to be screened tomorrow night at 7.05pm. Rebecca has gone from allegedly bedding David Beckham to dating 6ft 7in fireman Chad Eagle. The former PA, who claimed to have had a fling with the England football captain, picked out the firefighter on the primetime ITV matchmaking programme. See PA Story SHOWBIZ Loos PA Photo handout/ITV/Ken McKay
Davina McCall arrives for the '2005 TV Moments' show, at the BBC TV Centre, west London, Tuesday 29 November 2005. PRESS ASSOCIATION Photo. Photo credit should read: Ian West/PA
Davina McCall and husband Matthew Robertson arriving at the BAFTA Television Awards 2005, The Theatre Royal, Drury Lane, London.
(L-R) Nikki Grahame, Pete Bennett, Davina McCall and Dermot O'Leary with award for Most Popular Reality Programme at the National Television Awards 2006 at the Royal Albert Hall in west London.
EMBARGOED UNTIL 00.01 HOURS ON 28/12/2007 Davina McCall on The Friday Night Project for the recording of the New Year show at the London Studios, South Bank, London.
Davina McCall (left) and Chantelle Houghton arrive for the British Academy Television Awards, held at the London Palladium, central London. PRESS ASSOCIATION Photo. Picture date: Sunday 20 May 2007. Photo credit should read: Yui Mok/PA Wire
Amanda Holden and Davina McCall at the National Television Awards 2008, the Royal Albert Hall, Kensington, London.
Davina McCall arrives at the Britain's Best 2008 awards at London Television Studios.
Davina McCall at the the Big Brother 10 House during final night, Elstree Studios, Borehamwood, Hertfordshire.
Alex Reid is interviewed on stage by Davina McCall after winning the Celebrity Big Brother Final, at Elstree Studios, Borehamwood, Hertfordshire
Davina McCall and Matthew Robertson arriving at the Glamour Women of the Year Awards 2011, Berkeley Square, London.
Davina McCall at the launch of the Fearne Cotton SS13 Collection for Very.co.uk at Claridges Hotel, London.
Davina McCall attends 'The Masked Singer' TV show photocall at the Mayfair Hotel in London. (Photo by Keith Mayhew / SOPA Images/Sipa USA)
Davina McCall during the National Television Awards at London's O2 Arena.
Davina McCall arrives at a Halloween party hosted by Jonathan Ross at his house in north London.
Davina McCall arriving for the ITV Palooza held at the Royal Festival Hall, Southbank Centre, London.
Davina McCall in the press room during the Pride of Britain Awards held at the The Grosvenor House Hotel, London.
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McCall added: "So then I thought 'Well, I'll just take a Valium', and the next thing I knew I woke up in hospital.
"At my lowest point, when I was filled with self-hatred, it was literally a case of 'get clean, or die'."
McCall said she was the person that "people who have crossed the street to avoid", and that she started taking cannabis before becoming a heroin addict.
"It ended up taking me to the darkest, darkest place," she said.
McCall, 52, whose TV career started on MTV in the 1990s before she landed a job as the host as Channel 4's dating show Streetmate, said she "empowered" herself to change her situation and that she made a decision to change herself.
She added: "And because I got clean I got the job I'd dreamed of and that changed my life forever.
"I hated myself so much. I was so full of self-loathing. I was telling myself constantly that I wasn't worth anything."
Following the drug overdose, McCall became clean within around a year with the help of Narcotics Anonymous meetings.
She became a household name in the early 2000s as the presenter of Big Brother, which started in 2000.
She remained on the show until 2010, and has also fronted programmes including game show The Million Pound Drop, winter sports reality show The Jump, ITV celebrity talent show The Masked Singer and ITV's Long Lost Family.