Eh, thats why you get "flush free" niacin... The 500mg capsules I get have 400mg of niacin and 100 mg of inositol which is supposed to make you not get the red shitty itching feeling.
Anyone that needs to pass a drug test, go and get XXtra Clean detox drink.
http://www.drug-test-facts.com/drug-...y/xxtra-clean/
This is the directions the guy at my local headshop gave me.
1.) Dont smoke for 4 days prior(i've seen reviews where people smoke the day before and still pass)
2.) Drink lots of water, excersize, and DRINK CRANBERRY JUICE (NOT JUICE COCKTAIL OR CONCENTRATE). The cranberry juice is critical because your body breaks it down over a 24-48 hour period into creatinine, which a lab will test for to make sure your not diluting.
2a.) XXtra Clean contains 625% of your DV for B6 and 25% for B12, I would avoid taking more B-vitamins because it will make your piss a neon color.
3.) Dont eat the day of the test!!! Also dont drink shitloads of water the day of the test, drink what is recommended or you will get a dilute result.
4.) Maybe a little more than an hour before the test, drink the bottle of XXtra Clean.
5.) Wait 5-10 minutes, then fill the bottle back up twice with water.
6.) Urinate a 2-3 times, you should have a 5 hour window once it kicks in.
7.) Give the lab your 3rd or 4th piss and you should be good to go!