A coroner concluded The Vivienne, whose real name is James Lee Williams, died by “misadventure”.
Williams, who won the first series of RuPaul’s Drag Race UK in 2019 and was found dead at the age of 32 at their home in Cheshire on 5 January this year.
In March, the star’s family revealed the performer had died “from the effects of ketamine use causing a cardiac arrest”, saying they wanted to raise awareness about the dangers of the drug.
The opening of an inquest into the death of Williams at Cheshire Coroner’s Court in Warrington in February heard they were found dead in the bathroom of their home in Chorlton-by-Backford, near Chester.
Police attended and confirmed there were no suspicious circumstances.
Williams’s funeral in Bodelwyddan, Denbighshire, North Wales, was attended by RuPaul’s Drag Race UK contestants Tia Kofi and Baga Chipz, along with Steps singer Ian “H” Watkins, TV personality Kim Woodburn and Coronation Street actress Claire Sweeney.
During their time on the show, under their drag name, Williams admitted having been a drug addict for four years.
“It was party, drugs, but I couldn’t leave the drugs at the party, it was constant for me,” they said.
They added that their addiction was a “habit that caught on a bit too quick and a bit too hard”.
The TV personality, who grew up in Colwyn Bay, North Wales, before moving to Liverpool, came third in the 2023 edition of Dancing On Ice.
The star performed as the Wicked Witch of the West in a UK and Ireland tour of The Wizard Of Oz musical and reprised the role in the West End at the Gillian Lynne Theatre last year.
They were due back on stage in March as the Childcatcher in a tour of Chitty Chitty Bang Bang, a role they first played last year.
The government is seeking expert advice after illegal use of ketamine surged to record levels.
In the year ending March 2023, an estimated 299,000 people aged 16 to 59 had reported use of the substance, which is controlled as class B, according to the Home Office.