I too started 5 mcg of Byetta on July 23,2012. Initially,I had jitteriness similiar to too much caffeine and a constant "tight head" like my skin was stretched tight on my scalp. I immediately noticed improved #'s. My morning highs have plummeted from 160-180's to 100-110 after three weeks. I can still spike to 200 when I'm bad,but a walk brings it down imediately. I do have a full feeling most of the time and my hunger is down along with my weight. I've lost 4# in three weeks.
For me,this is a wonder drug. I'm blessed to have a generous prescription plan.