I have heard good things about detoxing with Niacin a couple of days before the test. Anybody have experience with Niacin?
Whoever informed you of whatever "good things" about niacin need to do some serious research on how the human body processes THC. Because if they had actually done their research, they would understand that there is no product that can rid the body of THC - and that includes niacin. Only time and fat-burning exercise can do this.

Do a Forum Search with the terms "niacin myth".


Given your smoking history and the fact that the scheduled U/A is just around the corner, your only two viable options are:

a) Substitution - Read up on the 'Substitution' "sticky" thread.

b) Dilution - Read up on the steps outlined in the 'Dilution' "sticky" thread (disregarding the "aspirin" step though)