My doctor worked me up on my doses of Metamucil (sp?) every 2 weeks...I think that's kind of their standard rule, so you might want to wait a few more days. Obviously if you are wanting to do it sooner you should call your doctor.I'm sure you've already heard this, but as with any fiber bulking agent, drink a ton of water. I've been told this over and over again, and I always shake my head "yes, I will", but it's often hard to do.