Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Levocetirizine is used to treat symptoms of year-round (perennial) allergies in adults and children who are at least 6 months old. It is also used to treat symptoms of seasonal allergies in adults and children who are at least 2 years old.
Intravenous Immunoglobulin (IVIG) is a plasma product used in the treatment of certain conditions related to the immune system.VIG therapy is done by administering medication directly into the bloodstream to help treat autoimmune diseases, immune deficiencies, and certain kinds of infections.
They may be recommended if a second dose of IVIG isn't effective. If your child is found to have a high risk of heart problems, they may be treated with corticosteroids as part of the first treatment. Research is currently looking at the benefits of using corticosteroids to treat Kawasaki disease. The results have been inconsistent, but one review found they can reduce the need to be treated again with IVIG but don't reduce the risk of heart problems.