Do you suffer from chronic or severe constipation?
Because I suffer from chronic constipation, and when I first started taking oxypowder, It took a couple of nites of upping the dosage before I noticed all pissed off the next morning, cuz I thought I got ripped off or something!
But they told me the same thing, just up the dosage slightly. From what I understand, this doesn't happen often with Oxypowder, but if you are really constipated/compacted then sometimes it takes a little more to get going.
I'm sure (or hope) you've read over the Oxypowder Website, but here is a good article about Oxypowder. I would also recommend you call their customer service if you experience any more problems. They're pretty good at talking to their customers...