Work can be hard at times. Can you find a way to get back on the drug that was helping you? I thought I was going to cry myself out of a job for a while there. So, I think it is important to do what you can to get the support that you need to continue to hold the job. I hope you find a way to make it work for you.
As for the above posting, does an employer actually do that? My co-worker wanted to have some water at the front end (ADs make your mouth dry at times). They finally allowed it after some majorly grumpling about it. I told her to get a letter from her Dr. because I thought I might feel a need for water if I started an AD.