In recent years there has been a growing trend of allergic diseases, especially in the more economically developed and densely populated countries. In Europe, this problem affects about 50% of children – mostly food and contact allergies. So this is a serious problem not only clinically but also economical, allowing include allergic to the diseases XXI century. An important part of the therapy of allergic diseases is pharmacotherapy, often long and associated with the side effects of medications, which also generate the cost of treatment.

Key words: allergic diseases, pharmacoeconomics, paediatrics.