Hi Everyone, we have an appt. with the allergist in two months (annual check up) to ask this question but I was wondering if anyone had any thoughts here. My daughter started allergy shots for all of the inhaled allergens when she was 3 1/2 with excellent results (weaned her off antihistamines and she only used a nasal inhaler with no symptoms). When she turned 5 we moved 1 1/2 hours away. The allergist continued to mail the serum to us and the peditrician's office gave her her shots. We had to make a decision, however, to either drive her back every year to get her annual check up or change allergists. Well, I made the wrong decision! We switched allergists and, therefore, serums. After we switched the serums she deteriorated. She was supposed to move to once per month shots and we were back to every two weeks. Well, after a year of this I switched her back to the original allergist. She is even worse now! She is now back on antihistamines! Do you think that switching serums messes up everything? Neither allergist suggested this possibility. When we switched the first time he said that he had a few patients who switched like this but not many.