I have been looking at ADA laws lately and it says that a psychiatric disorder or chemical dependency problem in an employee's PAST cannot be used to discriminate in hiring.
I have also worked with several bipolar nurses who did fine on their meds and worked critical care. A note from their doctor sufficed. Also know many nurses on Prozac, etc for chemical imbalance/depression. Again, they do FINE on their meds.
I guess it comes down to if you are willing to fight for this or not. I know, sometimes it's not worth the energy put out to fight 'the system'...easier to go somewhere else for work...
If you're in a feisty frame of mind, why not contact an attorney and ask a few pointed questions? You could ask if there has been a violation of confidentiality too while you're at it. Usually the first visit is complimentary and you could get some free advice.
Nurse attornies (JD RN's) are specially helpful because they understand the health care end.
I've been researching the ADA because in order to get any nursing job in the future I may need to use it too...as an injured nurse with spinal arthritis and chronic pain I'm seen as a risky hire even for desk jobs.
So I know how hospitals are too...
...good luck and let us know how it turns out, OK?