List of products in the National Drug Code with proprietary name . Palivizumab is used in certain infants and young children to prevent serious lung infections (such as pneumonia) that are caused by a certain virus (respiratory syncytial virus-RSV). Palivizumab works by preventing the growth of the virus. This medication is not used to treat RSV infection, but should be continued even if your child gets the RSV infection to prevent a more serious infection.