Okay, idk if this is the right place for this post but here we go. I am a regular smoker smoking pretty much everyday. I have discovered I have an upcoming physical appointment for school and I am flipping! I asdume a urine test will have to be taken and this is my reason for the concern. Today is saturday an I have been taking niacin to detox early. I am 233lbs and about 5'7 or 5'8. The test is Thursday and I'm looking for suggestions to help me pass this test. Help me out please! *I have the 500mg no flush niacin.