You may want to try drinking more water while taking it. Or maybe just take the psyllium only, instead of the AIM colon cleanse. Psyllium does a great job at removing mucoid plaque, but you have to drink alot of water with it.
Also, one of my closest friends moved to South Africa and I've talked to her and she gets Oxy-Powder shipped to her down there with no problems. In fact, she's currently looking into setting up a small health store, where she will be selling it. It's a pretty good cleansing product, but doesn't work on the same principle that psyllium does.