I've been using both for awhile. IF#1 is supposed to be taken along with IF#2. #1 will make the bowel work, you may even feel some cramping. This is normal. It is adjusted gradually, starting with one, and increasing by one each evening, until you are moving your bowels 2-3 times each day. It is flexible. My directions told me to take IF#1 at suppertime with my meal. While you are doing this, IF# 2 is to be used 5x per day, with each dose followed by extra water/juice. Taking extra water after each dose, would aid to prevent the constipation, you talked about. Later, when you have completed your bowel cleansing program, you could actually continue with IF#1 to assist with regularity.
Anyway, hang around, it is likely that you will learn allot more from 'all the others'. momo