i have had metastatic Her2 positive breast cancer for 3 years; with 2 prior diagnosis in 2006 and 2010. Every 3 weeks I receive an infusion of Herceptin (trastuzumab).
I know that statistically many Her2+ mets patients have received Herceptin continuously for more than 3 years. Information on Immune system fallout or side effects is hard
to find; possibly because it is different for everyone. In the past year; reoccurring shingles has been the biggest problem, along with increased allergies and eczema. Although these issues seem minor in the big picture; they do affect quality of life. Thank you for drawing attention to this problem!