I took Belladonna in to see the old curmudgeon.
Belladonna was not diagnosed with Amyotrophic Lateral Sclerosis. That is why you go to a family doctor and not a student in a nursing program for medical advice. The family doctor has all of your records and history.
Her symptoms are consistent with titer-up/titer-down side effects of a medication she is taking. That is, she is likely to get neurological symptoms if she gets sloppy about taking her med and misses a few days here and a few days there. Well, "Da!" she is sixteen.
The plan is for her to religiously take her med and record it in her phone. Then, if the symptoms do not abate she can look at her phone to see if she missed taking the med. If it proves impossible for us to reliably deliver the med, there are other choices that are less sensitive to titer-up/titer-down issues.
As far as I am concerned, that was a happy ending.