Well, the thing about Wolfsbane is that it lets you keep your mind when you transform. It's not that she's lost hers, not the way a transformed werewolf does. She's clearly Luna, just very agitated and stressed.

She looks a little like someone who did a lot of Dark Magic and is now feeling completely beside themselves, like sometimes you do. Except turned up to eleven.

Anyway, we think that the Wolfsbane wouldn't help. (Also, it's not that it makes them go to sleep, it's more that it lets them keep their minds so they can do what they'd normally do at night, which is sleep.) A sleeping potion might be something to try, actually, especially a really strong one, although werewolves metabolise potions differently... anyway.