There is a medical facility here run by doctors, PA's and nurses that do the infusion. They take a full history and examine you then after discussing your condition they concoct what they recommend. I have had great results. I do it b4 travel, when exposed to something, when I feel I might be catching something and when I am trying to get over something stubborn.
I put in a reverse osmosis water filtration system...well worth the money but I still use distilled to mix the NeilMed but use the filtered water for drinking, cooking and washing my device pieces and all fruits and veggies. I am not a netti pot girl but it's a personal choice. Both achieve the same thing. Hope that helps!