Will she drink water in a bath or via dropper? That might be a good idea just to get some hydration in her.
If she hasn't lost any weight by next week I'd be inclined to just leave her be if shes acting like shes brumating.
She looks nice and bright, not really sickly or stressed so that's a good sign!
Well like I said, she looks bright and healthy from the outside. Let's give her a couple days and see what happens. Sometimes they honestly can just go through moods lol!
Also, some meds are harsher than others so depending on what was prescribed, she might still be feeling a bit off from that.