Hello Allawi
Carter's grandmom has what is called
Shy-Drager syndrome which is is a rare, progressively degenerative disease of the autonomic nervous system. It is named after Dr Milton Shy and Dr Glenn Drager, who identified this syndrome in 1960.
It was officially deprecated as a disease entity in 1996, and existing cases were redefined as multiple system atrophy with autonomic phenomena. The name "Shy-Drager syndrome" is still used occasionally for multiple system atrophy when the primary symptoms are autonomic failure.
A notable sufferer of Shy-Drager syndome is the singer Johnny Cash.
(the medical info r taken from:
http://en.wikipedia.org/wiki/Shy-Drager_Syndrome)(
Wikipedia ROCKS! 
)
Now,
your second question, the med student has a psychiatric problem in which she causes those wounds to herself (something known as self harm, helps to relieve stress in such troubled people), this is probably because she has a history of emotional abuse by her parents and because she's under alot of stress since she's studying medicine AND law at the same time.
They injected her with haloperidol which is an antipsychotic drug to calm her down.
I hope this was helpful for u brother