as such does not induce Grave's disease. She must have gotten it due to the antibodies
developed against thyroid hormone receptor which stimulate more and more hormone secretion. She thought that hers hyperthyroidism
is due to this drug may be because the symptoms are more or less the same.
It is always better to be supportive to somebody in need. May be you can take her to a good psychiatrist
as well to get her rid of the addiction as well as to make sure she takes the anti-thyroid drugs timely to avoid long terms side effects of the Graves disease on her body. Take care.