I tried using P&B shakes a couple of months ago and found that it caused me to be constipated too. I stopped using them and started to drink lots of water, and I was able to go. If that doesnt work for you, you might want to try an enema. Constipation is nothing to joke about, if your constipated for a long time, all of the toxins will recirculate through your body and make you intoxicated. Believe me from experience, its no fun!! Good Luck!!!