Exasperated symptoms and conditions

My mother was diagnosed with Alzheimer's last year. It has been in the mild stages until last week when she was hospitalized for diverticulitis.
Upon being discharged she was prescribed Levaquin 500mg to be taken once a day for 12 days. Because the cost of the drug was $132.00, I had them cut the rx in half.
Since taking this drug my mother has had morning sweats and worst of all it has made her combative and belligerent. I know as Alzheimer's progresses that some patient become this way but based on the fact this she did not become this way until she began taking this medication, I believe it exasperated her condition. And since taking her off of this drug, she has become more calm but it has had to work itself out of her system over the past 6 days.

II have been taking Lisonpril at 5, 10, 15 and 20 mg doses for the better part of a year. I have gotten over the cough but it does not seem to lower my BP that much and have experienced severe nervous reaction to the drug. !0mg is about all I can tolerate. My Doctor wanted me to keep increasing the dose up to 40 mg if I had to. When I reached 20 mg twice things got worse with no significant decrease in BP. I also began to experience a pain in my fingers as if I had arthritis. I take a dose in the morning and then about mid morning to Noon my ears begin to tighten up, some slight light headedness and I get nervous. Some of these nervous attacks have actually exasperated the BP problem by raising it. The Doctor prescribed some Xanex to take when this happens but do not want to get too hooked on taking it.

I also take Vitamins and Thyroxine(Synthroid) and wonder if there could be some interaction with this.

Has anyone experienced these symptoms especially the nervous reaction and light headiness??