An interdisciplinary research team from the Allergology and Veterinary Medicine Divisions at the Paul-Ehrlich-Institut (PEI) has developed a novel laboratory test that enables the determination of adjuvanted allergoids in finished medicinal products. Content analyses of finished medicinal products were not possible in the past due to the complex structure of this medicinal product group, which contains both adjuvants and allergoids (chemically modified allergens) and therefore had to be performed on an intermediary production step.