Good news guys! I found a sympathetic allergist in Northern California and am going in to begin testing and treatment in about 15 days. I have one question, though. Do you guys take anything to keep you from getting symptoms after O-ing in the doctor's office. I know for my test i've been told not to take any anti-histamines for 5 days prior and, if Dr. Waldinger is correct in theorizing that Niacin works because it depletes histamine stores, I imagine that I'm also not to take Niacin. Is this always going to be the case? Will I be allowed to take Niacin once I begin treatment? And, if not, what should I do so I don't get BAD POIS symptoms?