The problem with this approach is that both normal cells and cancer cells have these same parts. So, chemotherapy can affect many cells throughout the body, including normal cells. It's not as selective about the cells it attacks.
Don’t get us wrong; chemotherapy is still an extremely important part of most cancer treatment plans as it remains highly effective at treating cancer. It’s especially important when you need to shrink or kill the cancer very fast. Unfortunately, the downside is that it can lead to more side effects than other anticancer treatment categories (like targeted therapy).