you can take from 300-900mg of KI for lung problems. this would be about 20 droppersful of wilsons to deliver that much KI. i would say take it until you get results. take it in orange juice and you wont get the harsh effects of the 2%of I2 in the wilsons. thats not 20 drops, its 20X8drops. i have done that much of it before with no problems. dont do more than you have to, but do enough to get results. you will get results and not need a doctor if it is bacterial and not something exotic. its worth a try and youll know right away so you can do plan B if needed.