Hi, Michelle.Welcome to the NSDA bulletin board. Sorry you're having a rough time with your voice, job, etc., but you've found a great source of support and information!
First I'll try to address some of your questions. It is possible, albeit rare, for botox to become "denatured" during the reconstitution process (i.e., when it is mixed with saline) so that could be one reason why that vial of botox your MD gave to several SD patient didn't work. If it did, however, work for even one patient in the group, that would not be the cause for multiple failures. That being said, it sounds like it's possible that's what happened here. In that case, "blame" would not be placed on the manufacturer, but instead on the individual (your MD, one of his assistants) who prepared the vial of botox before injecting patients. But again, this is only one of several reasons why botox may not work. If all 4 injections for you have not worked, I'd re-evaluate your MD and/or your diagnosis in order to try and improve treatment results.
As for your job, generally if you resign, you have no recourse for a wrongful termination claim against anyone. But even if you were fired and blamed that on "bad botox," you'd still have no claim, unfortunately, based on that reason alone. There are no guarantees in medicine and generally only injury (versus lack of result - i.e., no effect but with no harmful physical consequence) will generate a valid claim. However, had you been fired from your job simply because of your voice, and your voice was not required to perform the essential duties of the job effectively (this may or may not be the case), then you might have a claim against your employer.
Ovearll, it is quite rare for botox to become denatured and/or to develop an immunity to it, so I'd try it again, perhaps even with another MD.
You might want to look into vocational rehab in order to get back into your field and/or pursue a similar or even different career. But it sounds like you have some prospects already. If you haven't already pursued this, you may also want to look into COBRA in order to hold onto your current health insurance, leaving no gaps in coverage, before you find a new job.
Anyway, welcome to the bulletin board. I think a lot of us can relate to your issues. I gave up my original career (social work) by choice due to SD and found another (paralegal work). While I can now see getting back into my original field since I have a very good handle on treatment and can function pretty well with SD, leaving it 6 years ago wasn't an altogether bad thing.
Good luck with everything,
Laurie (beareisam@aol.com)