Lithium Carbonate and dizziness

Swollen glands,nodules on throat,fever that comes and goes,dizziness,sweating,muscle aches

My wife was put on Lithium about 2 years ago for only about 6 months and frankly I saw no improvement or change.
We were assured that any decrease in thyroid activity would only be temporary however despite never having any thyroid problems before she was started on 25 micrograms of thyroxine to compensate for lack of thyroid activity.It is now up to 100 micrograms with no anticipation of any improvement.
Although there seems to be no evidence of it causing permenant damage I wish now that she had never been started on it.