How Chemotherapy Works and Why It Ultimately Fails
"Cytotoxic chemotherapy kills cancer cells by way of a certain mechanism called "First Order Kinetics." This simply means that the drug does not kill a constant number of cells, but a constant proportion of cells. So, for example, a certain drug will kill 1/2 of all the cancer cells, then 1/2 of what is left, and then 1/2 of that, and so on. So, we can see that not every cancer cell necessarily is going to be killed. This is important because chemotherapy is not going to kill every cancer cell in the body. The body has to kill the cancer cells that are left over after the chemotherapy is finished. This fact is well known by oncologists.
Now, how can cancer patients possibly fight even a few cancer cells when their immune systems have been disabled and this is yet another stress on the body, and they're bleeding because they have hardly any platelets left from the toxic effects of the chemotherapy? This is usually why, when chemotherapy is stopped, the cancer grows again and gets out of control. We have now created a vicious cycle, where doctors are trying to kill the cancer cells, and the patient is not able to fight the rest, so the doctors have to give the chemotherapy again, and then the patient can't fight the rest of the cancer cell, and then the doctors give the chemotherapy again, and so on."