My son is 20 and has Crohn’s disease… The health plan insisted that he switch product brand, because of their insurance contract with said company. His immunologists from both coasts argued in writing and on the phone that since he has no antibodies to the antigens in that brand, it would surely cause an allergic reaction/hospital admission. This arguing lasted about 3 days - 3 more days of delaying carefully timed treatment that is helping him to stay in a sort-of remission state, by the skin of his teeth...It isn't wise and it isn't fair to add this burden to patients and their families, because living with and managing chronic illness is already fraught with many barriers. I am so exhausted.