Former EastEnders star Elaine Lordan will not be returning to ITV1 reality show I'm A Celebrity... Get Me Out Of Here!, producers have confirmed.
Lordan played Lynne Hobbs in EastEnders until July 2004
The actress has spent the past two days in hospital after twice collapsing in the Australian jungle where the top-rating show is made.
Doctors have said she is in good health but producers have decided it is too risky to allow her back into the show.
The programme sees 10 personalities try to survive life in the jungle.
"Knowing what challenges lie ahead in the show, ITV has decided to err on the side of caution and Elaine has reluctantly agreed to withdraw," an ITV spokesman said.
The 39-year-old actress passed out on her first day in camp during a jungle trek with fellow contestants Carol Thatcher - the daughter of former prime minister Margaret Thatcher - and Emmerdale actress Sheree Murphy.
Lordan was revived but collapsed a second time the following day.
The actress left her role as Lynne Hobbs in EastEnders in July 2004.
I'm A Celebrity... is now in its fifth series and its first episode on Sunday drew 9.4 million viewers.
Fellow ex-EastEnders actor Sid Owen, ex-Atomic Kitten singer Jenny Frost, TV antiques expert David Dickinson and former child star Jimmy Osmond are also taking part.