All I can tell ya, is i tryed to drank that nasty crap once. I got the first pouch down, then i went for the second one and halfway through I puked my guts out, and ended up relying on water.
If you got until the fifth the best cheap recomendation I could give you is to eat up to 4,000mg (you dont need to eat this much, but i've been known too.) of niacin a night. Noone in thier right mind is gonna tell you to eat that much niacin except me, the maximum dose in a prescription grade niacin is 1,000mg just to let you know. But I preffer overkill rather than failure.
Many people believe Niacin does not work, thier wrong! It's just painful, red skin, burning sensation, feeling like shit, all symptoms you have taken the right amount.
It's bad for your liver, and I now have an ulcer and I cant help but think the niacin had alot to do with it, but i was drinking a couple fifths of liquor a night for a long time, that was probably the real cause.
Good luck to you, I'm starting the Niacin cleanse tonight.
(only take 4,000mg of niacin a night if you dont plan to stop smoking pot, just get really, really fuckin stoned, eat em' and go too sleep! Make sure your tired enough to crash through the burn if you want that much niacin in your system, It sucks man!)