II have been taking Lisonpril at 5, 10, 15 and 20 mg doses for th...

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??