The British Board of Boxing Control (BBBofC) confirmed that Tyson Fury's boxing licence has been suspended pending further investigation into "anti-doping and medical issues".
Fury vacated his WBO and WBA world heavyweight titles on Wednesday after testing positive for cocaine and admitting he is suffering from mental health issues. The British boxer also faces a UK Anti-Doping hearing next month after traces of nandrolone were allegedly found in a urine sample last year.
BBBofC general secretary Robert Smith said Fury's claim that he is suffering from depression will be considered when assessing any doping offences.
"We have to wait to see what the investigation turns up and at the moment he doesn't have a licence so can't box," Smith told ESPN on Thursday. "He's being dealt with by UKAD so we will have to see what happens there and with regard to medical documentation, we have had medical documents from him.
"We are in no hurry. His statements [on mental health] have already been considered because his licence has already been suspended. At some point we may have to have a hearing with Tyson. There are a few other things going on with regard to this matter as well."
Hennessy Sports, Fury's promoter, said in a statement that the boxer is receiving "expert medical attention".
Fury twice pulled out of a rematch with Wladimir Klitschko, who he upset on points to win the IBF, WBO and WBA belts in November.
Ukrainian Klitschko, who had reigned for over nine years, is now on the brink of signing a deal to fight Fury's fellow Briton Anthony Joshua, the IBF champion, in Manchester or Cardiff on Dec. 10.
"Whilst it's heartbreaking to see Tyson vacate the world titles that he worked so long and hard for all his life, what's paramount now is that he receives the medical treatment along with the love of his family and friends and the support of the boxing world to make a full recovery," said Fury's promoter Mick Hennessy in a statement.