Immunorel 5gm Injection 100ml is an immunostimulant drug in the category of immunoglobulin derivatives, containing the active ingredient Human Normal Immunoglobulin. It is used as a replacement therapy for individuals with primary immunodeficiency disorders (PIDs), where the body's immune system cannot produce sufficient antibodies to fight off infections. The medication is also used to modulate or regulate the immune system in certain autoimmune and inflammatory conditions. It can help reduce excessive inflammation and suppress abnormal immune responses.