Thanks, all, for your input and caring. There's not much--or really anything--I can do (outside of bringing her food, helping her around the house when she's bedridden, etc), and I already know there's little to nothing in treatment options--at least within conventional medicine. My friend had a bad episode about two weeks ago and lost a week of her extremely busy life, and yesterday had a much less severe repeat episode. We, her friends, are really concerned for her. Stress can definitely trigger an attack, and from that point she has to stop whatever she's doing and get into bed. If she's been driving, it's a huge issue; she has to pull over or try her best to make it home. Not life-threatening in itself, but nonetheless a miserable thing to deal with. And my friend refuses to be hostage to it, and lives her life, but it's increasingly worrisome that these episodes are playing out longer, and possibly coming closer together--though this may be a one-time thing.
I had no idea about Kristin Chenowith. How difficult. Especially as she is a musician, and may be on her way to hearing loss. My friend, in fact, is my tango teacher, and she has maybe a few years left before she becomes completely deaf without hearing aids. Each time she has an attack, it also creates problems with her balance that seem long-lasting beyond the episode itself.
She has many friends who care deeply about her because she's a wonderful person. Thanks for acknowledging our friendship.