Roseanne Barr said she was “Ambien tweeting” when she wrote racist remarks on Twitter that compared a black former Obama administration official to an ape, a comment that led ABC to cancel her television show.

But on Wednesday the makers of Ambien, the sleep aid, were having none of it.

“People of all races, religions and nationalities work at Sanofi every day to improve the lives of people around the world,” the company, Sanofi U.S., said on Twitter. “While all pharmaceutical treatments have side effects, racism is not a known side effect of any Sanofi medication.”