You got it pretty much, Mild shaking, sweating, looking tired, in the extreme they may apear to be drunk, but that would prob be too overboard for the stage.
I would have them be weak, dizzy, need to sit down, but calm about it, while the others around her over reacting to it, " OMG gwhat do we do?!?!, get her some sugar, get her a candy bar" etc.. I dont know the scene, haven't seen the play and not sure where you want to go with it.
I could go on but then I used to direct plays also, old directors never die we just need a new script! LOL
Sigmoid Colostomy / Crohns / Type 1 Diabetic / Ostioarthritus / Asthma / High Blood Pressure / High Colesterol / Migraines. Ain't life a joy?
* I think it may be time for a colorful metaphor*