Demi Lovato has been taken to a Los Angeles hospital after suffering an apparent overdose, according to a report from TMZ.

Law enforcement sources tell TMZ the singer and actress was treated at her home in Hollywood with Narcan, used to treat narcotics overdoses, then rushed to the hospital before noon on Tuesday. According to People and Variety sources, she is now in "stable" condition after initially being found unconscious at home.

A source later told TMZ that Lovato had not overdosed on heroin, as was previously reported. Despite saying that it wasn't heroin, the source did not mention another drug. 

“Demi is awake and with her family who want to express thanks to everyone for the love, prayers, and support,” Lovato’s rep told Variety in a statement. “Some of the information being reported is incorrect and they respectfully ask for privacy and not speculation as her health and recovery is the most important thing right now.”

Lovato has long been open about her struggle with substance abuse. In June, the 25-year-old released a single called "Sober" in which she revealed she had relapsed after six years of sobriety. "Mama, I’m so sorry I’m not sober anymore/And daddy please forgive me for the drinks spilled on the floor," she sings over somber piano. "And I’m sorry for the fans I lost who watched me fall again/I wanna be a role model, but I’m only human." Lovato finished the song by pledging to get help: "I’m sorry that I’m here again/I promise I’ll get help/It wasn’t my intention/I’m sorry to myself."

Struggling with addiction since she was a teenager, Lovato previously checked herself into a treatment center in 2010 to deal with an eating disorder, mental health, and substance abuse. She has admitted to using alcohol, cocaine, and OxyContin as self-medication.

"Every day is a battle," Lovato said in 2017 about her mission to stay sober. "You just have to take it one day at a time, some days are easier than others and some days you forget about drinking and using, but for me, I work on my physical health, which is important, but my mental health as well."

Kehlani, who made headlines for kissing Lovato onstage during the final stop of the Tell Me You Love Me Tour in April, wrote on Twitter that Lovato will "beat this as you did before." In a second tweet, she added, "Addiction isn’t one of those things you can put yourself in the shoes of. You had to have fought the fight yourself or had it rip your family apart your entire life... even then, the latter is still not the same thing. This isn’t the time for the picking apart or making light of."

In the wake of this incident, two of her shows scheduled for this week have been canceled. 

Fox has also pulled an episode of their game show Beat Shazam, which featured a guest appearance by Lovato. The show was set to air Tuesday night. "In light of recent reports, we have decided to replace the episode of Beat Shazam with another all-new episode," the network said in a statement. "Our thoughts go out to Demi and her family."

This story will be updated.