Roseanne Barr has slammed her co-stars for ''throwing'' her ''under the bus'' amid the cancellation of her sitcom.

The 65-year-old TV star had her eponymously titled sitcom 'Roseanne' cancelled this week after she took to Twitter to make racist comments toward former White House aide Valarie Jarret, whom she likened to an ape and accused her of supporting the Muslim Brotherhood political party.

And after her co-stars also took to social media to hit out at the star for her behaviour after their show was cancelled, she has now fired back with comments of her own.

In response to Sara Gilbert's tweet - in which she labelled Roseanne's comments as ''abhorrent'' - she simply wrote: ''Wow! Unreal.''

Roseanne also took aim at Michael Fishman after he posted a lengthy statement to Twitter explaining how ''intolerable'' Roseanne's comments were.

Part of his statement read: ''I believe our show strived to embrace different backgrounds and opinions, through open dialogue. While I am going to miss being part of the ABC family, I believe that to sit back, or remain silent in an attempt to distance myself from the actions/statements of others would unintentionally endorse or placate those statements which I find truly offensive. My character was designed to represent the inclusive nature of my views. To represent portions of society often marginalized. In this moment it is important to be clear. We must stand-up against; bias, hatred, bigotry and ignorance to make society a better place for all. (sic)''

And Roseanne replied: ''i created the platform for that inclusivity and you know it.ME. You throw me under the bus. nice! (sic)''

Michael then responded to Roseanne agreeing that she had tried to be inclusive on her show, but noting that it made her comments ''so out of character'' and shocking.

He tweeted: ''You fought, built, and designed 'Roseanne' for inclusiveness. That is why yesterday was so out of character with the last 30 years. It was in your hands from the beginning to the end. No one can deny that.''

The star has since deleted the tweet in question and posted an apology in which she defended her comments as ''a bad joke''.

She wrote: ''I apologize. I am now leaving Twitter.

''I apologize to Valerie Jarrett and to all Americans. I am truly sorry for making a bad joke about her politics and her looks. I should have known better. Forgive me-my joke was in bad taste. (sic)''

Roseanne also claimed that her comments were influenced by her use of the prescription sleeping drug Ambien.

She said: ''I think Joe Rogan is right about Ambien.

''Not giving excuses for what I did(tweeted) but I've done weird stuff while on ambien-cracked eggs on the wall at 2am etc. [sic]''