Thank you for your inquiry.
I am not aware of any reference discussing the use of glass syringes versus plastic syringes for the preparation of allergy extracts and could find no such reference in the literature. In the most extensive reference we have regarding immunotherapy, our most recent Allergy parameter (1), no mention is made of this issue.
Thank you again for your inquiry and I am sorry that I could find nothing specifically dealing with the question that you posed.
1. Cox L, Nelson H, Lockey R, et al. Allergen immunotherapy: a practice parameter, third update. Journal of Allergy and Clinical Immunology, January 2011; Volume 127 (1), Supplement, page S1-S55.
Phil Lieberman, M.D.