The usual celebrity crutch is "my account was hacked" when they say something they regret later. Blaming a drug is pretty close to that as far as how dumb it is.
When the facts don't seem to square with it, yeah. Like someone said, if the typical reaction is to be incoherent, and the only thing incoherent (well, incoherent for her) was the racist comment, nah. Not buying it.