Methimazole Reactions in Cats

This post is not about my kids, or even a particularly funny cat story.  I wanted to document what we went through with Zoom, my 14 year old cat, and a nasty reaction to methimazole, which was prescribed for hyperthyroidism.  Mostly I want to put this out there on the internet so the next person looking for “real life” examples of what can happen, and how it can get better, will find something