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.
1 Intravenous immunoglobulin (IVIg), usually given at a dosage of 400 mg/kg/day for 5 days or in higher doses for 3 days. 2  The procedure may need to be repeated every 4 weeks for several cycles.3  It is very expensive. 4  The use of IVIg for the treatment of skin diseases has recently been reviewed. Pulse therapy with mega doses of intravenous methylprednisolone, given at a dosage of 1 g/day for 5 days. ( 2 The TNF-a inhibitors such especially Rituximab are currently being investigated for efficacy in the treatment of Pemphigus Vulgaris).