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If you haven't smoked for 30 days, you will pass.

For as long as you have been smoking Yopu be be lucky to pass a piss test You need some help

Avoid spiking or masking the urine sample. This is a method used to throw off testing equipment from seeing certain results. Commercial and OTC chemicals containing nitrats were once used to mask THC but are now commonly tested for. i.e. Mary Jane Super Clean 13 (liquid soap), Urinaid (glutaraldehyde), THC Free (acid), Klear (nitrite), Urine Luck (pyridinium chlorochromate), TestKlear, Golden Seal, Terminator Gold, Stealth, Clean-X, and Instant Clean. These products are all detectable, and will result in a failed drug screen.

Tinted toilet waterDilute the sample itself. Dilution is the process of reducing the concentration of drug or drug metabolites in the sample.This is accomplished by adding fluid to the sample. Be sure to use warm water, as the temperature of the sample is recorded. Most facilities will put you in a room with no sink, and where the toilet water is tinted.Diluting a sample will lower the specific gravity and creatinine level.(creatine is used by muscles and creates a waste product called creatinine) Drug testing laboratories all routinely test samples to detect dilution.[1]

Internal dilution or "flushing". Many people assume that drinking excessive amounts of water will accomplish a negative result,However is it dangerous (people have died from water intoxication) it is also risky because colorless urine arouses suspicion, possibly flagging the sample and causing Them to run the sample at a lower CONFIRMATION level of 15 ng/mL (15 nanograms per milliliter) instead of a STANDARD test screen level of 50 ng/mL (this example is of THC). When the UA is run before the screen it will read that the Specific Gravity is low and it will be flagged, this also will cause a lower level test to be run [2]

Bottle with temperature meterSubstitute the sample. Substitution is a method that involves substituting your urine with that of another persons or a synthetic sample. Synthetic urine comes in two basic forms, the liquid type found in smoke shops that is similar to what is used to calibrate lab equipment or vials of a powdered concentrate that can be added to a few ounces of warm water.Both are kept in a delivery devise with a temperature meter. This method works on every employment urine test,(provided some conditions are met such as controlling the temperature (92 -100)and delivering the sample in 4 minutes or less). A liquid crystal thermometer with 2 degree offset like the ones used on the collection cups is ideal and a properly sized organic warmer as a insulating source as it is the body that is the regulator.

If you stop smoking, it should'nt show up. I think that it only stays in your system for up to 3 weeks (read it in a book), so u should be safe. However, it depends on how much you smoked and if there is any lasting damage to your Body, any tell-tale signs.

Good luck..

Quit being a druggie. Ew. Seriously why would you even annonce on the inernet that you smoke pot. This is not cool. Pot will ruin your life. Dont give me the "it makes me feel good crap" Cause thats dumb. Just think next time you do drugs. Please. Next time you might not want to announce it on Yahoo Answers. That way you dont get the actual level headed people giving you the real advice you need:

DONT SMOKE WEED!

DOPE AINT DOPE!

1) Quit smoking today.

2) drink water

3) relax, if you quit today it will NOT show up..

They do make synthetic urine, you can purchase it at greenfields. tape it to your leg so you do not get caught with it.

niacin once to twice a day.

google it... best technique. you should be clean if you do it well.