If i smoke like once a day for a week then take X amount of niacin can i pass a home drug test the next day?

how many niacin would i need to take?

I take it that cigarette smoking is not the type smoking that you were referring to? Answer is no. If you really want to pass a drug test after having smoked, you can drink 3 gallons of cranberry juice in a three day period before the drug test, then flush with water. I watched my ex husband do it for 2 years while on probation. Now you know why he's an ex. Not a idea life style when you're trying to raise a 6 & 8 year old. But as someone else pointed out, why not just quit? Otherwise you run the risk of screwing up your short term memory with long term usage. I can't remember how I figured that out!!!!!

Niacin wont do it - wrong B vitamin.
You wanted riboflavin.

Niacin won't do any good. You cannot pass a drug test.

No.That crap doesnt work and it shows up on some drug tests.Trust me I was on probation for a year getting tested once a week and failed numerous times.

Why not just quit smoking and pass the test? Smoking once a day, you don't have a nicotine addiction. Trust me smoking is a wast of money. Better things to do. I was hooked about 25 years and quit like turning off a light switch. I suggest a better habit, just associate with nice people.

Depends on what you're going to smoke.