Roseanne Barr claimed in an overnight tweet that she was using the sleeping pill Ambien when she tweeted a racially charged remark about former Obama adviser Valerie Jarrett. 

“It was 2 in the morning and I was Ambien tweeting-it was memorial day too-i went 2 far & do not want it defended-it was egregious Indefensible,” Barr said in a tweet, which is no longer available. “I made a mistake I wish I hadn’t but...don’t defend it please.”

Barr tweeted several times late Tuesday night and early Wednesday morning and retweeted dozens of fans coming to her defense. 

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"Being attacked and belittled more than other comedians who have said worse," she said in a tweet that has also since been deleted. 

"Hey guys, don't defend me, it's sweet of you 2 try, but...losing my show is 0 compared 2 being labelled a racist over one tweet-that I regret even more," she said in a separate tweet. 

She asked fans in another post not to boycott ABC. 

Barr said she would address the controversy on Joe Rogan's podcast, "The Joe Rogan Experience," on Friday. 

 

CNN "New Day" anchor John Berman dismissed Barr's Ambien claim, however, tweeting that he didn't remember racism being one of its side effects.

Barr on Tuesday referred to Jarrett as a child of the Islamist organization the Muslim Brotherhood and the movie "Planet of the Apes."

She later apologized to Jarrett and said she would be leaving Twitter. 

However, ABC Entertainment announced they would cancel "Roseanne" following the star's tweet. The rebooted classic sitcom debuted this year to huge ratings.

Jarrett responded to Barr on Tuesday, saying her comments should be used as a "teaching moment" about racism.

“I think we have to turn it into a teaching moment,” Jarrett said on MSNBC. "I’m fine. I’m worried about all the people out there who don’t have a circle of friends and followers who come right to their defense.”

— This report was updated at 7:44 a.m.