Because of this, I no longer have to keep going to the doctor to take anti-biotics for the throat infections which I am easily susceptible to. I usually take it until the infection clears and 3-5 more days afterwards. Oregano Oil not only kills bacteria, but fungus too! The only thing I don't like about it is the funny aftertaste, which is very minor compared to the great benefits I am getting from it. I usually take probiotics 3 hours after taking this to replenish the good bacteria and up to 3 weeks after stopping.