So it turns out the tizanidine is not a miracle cure. And for the last few days we have either had this
And very little inbetween.
Went to the GP today to rule out anything obvious and her ears are clear, her chest is sounding beautiful, and there's nothing hard where things ought to be soft. I suppose it's a good thing she doesn't have an ear infection, but it would have been nice to know this had a temporary and fixable with antibiotics kind of a cause.