Mr Ford said he would also take leave from his campaign for re-election. One of his rivals called on the mayor to resign. Mr Ford said in statement: "I have a problem with alcohol, and the choices I have made while under the influence. I have struggled with this for some time.
"I have tried to deal with these issues by myself over the past year. I know that I need professional help and I am now 100% committed to getting myself right," he said. The Globe and Mail newspaper said it has viewed a second video of Mr Ford smoking what appears to be crack cocaine in his sister's basement.
The national newspaper said two reporters viewed the video, from a self-professed drug dealer, showing Mr Ford taking a drag from a pipe early on Saturday morning.
The video is part "of a package of three videos the dealer said was surreptitiously filmed around 1.15am and which he says he is now selling for 'at least six figures"', the paper reported.
Mr Ford did not mention the reported video in his statement.
John Tory, who is running against Mr Ford, said he is relieved the mayor is seeking help but he should resign.
"Like Torontonians across the city, I am deeply disappointed by these revelations of Mayor Ford's behaviour," Mr Tory said.