How effective is this treatment? For how long does it works and how long the positive result will last?
Many conditions should be taken into consideration while assessing the prospects, effectiveness and treatment results duration. If traumatic factor is no longer topical(e.g. complicated childbirth or a car accident), effectiveness of headache or backache treatment(or other kinds of pain) is about 70% and a positive effect will last for infinite period of time (before the new accident happens).

If this approach is so good, why other doctors do not use it?
I do not have an exact answer to this question, but I have several guesses that can form one answer.
Perhaps, no research work has been conducted concerning reticular formation stimulation theory. Or at least I have no information about similar researchers and their results. That is the reason why I decided to share my observations. It happened in 1998 when for the first time I got a positive effect while using this approach. Severe headache lasting over a month disappeared after Papaverine injection 0,2 ml in the trapezius muscle.