Kaletra® contains two ingredients - lopinavir and ritonavir. These are both antiretroviral medicines prescribed for human immunodeficiency virus (HIV) infection. Lopinavir is the main active ingredient and ritonavir helps to boost the amount of lopinavir which gets into your bloodstream. Kaletra® slows the progress of HIV infection, but it is not a cure. HIV destroys cells in the body, called CD4 T cells. These cells are a type of white blood cell and are important because they are involved in protecting your body from infection. If left untreated, the HIV infection weakens your immune system so that your body cannot defend itself against bacteria, viruses and other germs. Kaletra® slows down the progress of HIV infection by reducing the amount of virus in your body. It does this by stopping the production of a protein that the virus needs to copy (replicate) itself.
This is a companion discussion topic for the original article at https://patient.info/medicine/lopinavir-with-ritonavir-for-hiv-kaletra