Okay, it's a little vague, but I guess you mean, why aren't IV antibiotics on the protocol?
A pill can be controlled and another pill can be delayed or not taken at all. An IV will give you a certain amount of abx directly into your bloodstream and, if one should have a more difficult reaction to abx, there's no way to undo what you've put into your system. In other words, instead of doing things 'gently', as this protocol was designed for, you kill so MUCH bacteria at once, you deal with tremendous die-off reactions and you might harm yourself or at least set your treatment back, not to mention being horrifically uncomfortable.
The difference between what we do and what we are capable of doing would suffice to solve most of the world’s problems. Mohandas Gandhi