As far as I know, they will not be able to do a damn thing, except to waste their magic.

[the look she shoots Sev is tired and wry] I will live. And be annoyed until it goes away, but it is not life-threatening. [her flatmates might have to live with her being ill over the course of the night, but it's certainly not as bad as the last go. This time, at least, she had her spell up]