Roseanne Barr posted in a series of tweets now deleted:
"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. I made a mistake I wish I hadn't but…don't defend it please"
After this she said she had done stranger things before while she was under the influence of the sleep drug.
Later on Roseanne redeclared it was herself to put the blame on mainly, and a little on the drugs.
Ambien itself is a famous and widespread sleeping drug brand for a drug called Zolpidem.