She is now awake and responsive in hospital, with her family beside her in hospital.
"Sources closes to Demi Lovato have told us that they are actually anxious for her now because this may not be her rock bottom, as they say", she told Inside Edition.
The statement did not provide any details on what led to the singer's hospitalization.
Two sources tell ET that the "Skyscraper" singer spent Monday night at Saddle Ranch Chop House in West Hollywood, California, at a birthday party with friends, where she appeared to be in good spirits.
She was reportedly given Narcon, an emergency treatment which blocks the effects of opioids in overdoses.
During the call, an operator tells the caller a couple of times that help will be arriving with lights and sirens, and to please send someone out to wave down the driver.
Demi Lovato attends 103.5 KISS FM's Jingle Ball 2017 at Allstate Arena, Dec. 13, 2017, in Rosemont, Illinois. "Love you. Not only for your incredible voice, for your incredible music, but for what you stand for and everything you do". "She pushed away everyone that tried to call her out or help her including sober coaches, friends and management", the source said. "This was going on for a few weeks and the warning signs were there".
Last month Demi said she was "not sober anymore" on her new single. Her decision was allegedly sparked by an incident in 2010 when she punched a backup dancer in the face while on tour with the Jonas Brothers. A song released in June titled "Sober" raised questions on the artist's sobriety. In the song she sings, "I'm sorry for the fans I lost who watched me fall again". "He felt like she was always making excuses for herself, her bad behaviour and not telling him the truth about what she was up to".