My little cat has been on meds now for almost three weeks to slow down her thyroid. She's having fewer episodes of vomiting, so I guess it's reasonable to draw the conclusion that there's some link between the two. In the three weeks she's had two episodes, the latest yesterday, with about six or seven days in between. That's better than the every other day she was having before that.
Cath and I had dinner and drinks with her new vet (they're friends) Saturday night, and she's encouraged by the results so far. After a couple more weeks we'll take her back for blood work again to see how her numbers have changed, and hopefully have the cardiologist look at her heart via ultrasound. That should give us a better look at how she is overall.
She seems to have put on a little bit of weight, and from a personality standpoint she's being friendly and playful. I'm crossing my fingers that this works out for her. She's a fun cat most of the time.