Unfortunately, we cannot give you a definite answer. Your immunology team will help ensure long-term patients are kept for as long as possible on a particular product. However, there are factors beyond their control that might come into play. These include problems of supply of your particular product e.g. any unforeseen batch contamination issues or production problems, the brand being withdrawn by the company or healthcare commissioners deciding that they are only willing to procure cheaper alternatives. Please see our leaflet on switching immunoglobulin products.