IgG-monoclonal antibody that targets leukemic cells receptors. Use for Esclerosis Multiple has been approved. Because a high molecular weight excretion into breast milk is unlikely and destruction of protein structure in infant's bowel renders intestinal absorption nil. It should be avoid in the first two post-partum weeks since pass of significant amounts of IgG to the milk can occur in the first 3 - 4 post-partum days.