While it may be quite popular for companies to require drug tests as a requirement for employment, it's a violation of civil rights. After all, they don't pay you when you're off the clock. You should be under no obligation to follow their rules when they're not paying you.
As such, you shouldn't feel any guilt for cheating on a drug test. However, if you're going to cheat on a drug test, then you need to do it right. There's no benefit in cheating a drug test, only to be caught. Then you're going to lose your job or not get hired even if you would have passed anyway. So if you want to pass a drug test, try these things.
Using Synthetic Urine
There are products on the market that claim to be synthetic urine. These products are exactly what they sound like. It's a liquid that is chemically similar to urine, and you can turn it in instead of your own urine. Depending on the brand of synthetic urine, many tests can't tell the difference.
However, if you're going to use synthetic urine, you need to get high-quality product. Synthetic urine is not the kind of stuff you can afford to buy cheap. Even the most common brand of synthetic urine has been known to fail from time to time. Instead, go for the highest quality, even if it costs quite a bit more. If you can manage, try to find a synthetic urine that comes with a quick heating powder. The temperature of the urine can mean the difference between passing and failing.
Ultimately, the best way to pass a drug test is to simply be clean. Yet the simple fact remains that no job should have the right to fire you because you did something off the clock. So if you're trying to beat the test, make sure you're prepared.
There are a few ways to detoxify, if you know the test is coming. One of the most common ways is to simply drink water. You'll need at least two days for this to work, and it's highly dependent on your size, weight, and overall health.
However, it is cheap. For this, you'll need to drink at least 64 ounces of water each day. This works best if you drink the water slowly over time, instead of simply chugging the water in as few sittings as possible. The idea is that water will dilute your urine, and thus flush remnants of the drugs from your system. Make sure not to over do it! If your urine is too diluted to test, many companies will consider it just as good as failing.
You might instead try juices that are high in vitamins. This will help ensure that your urine has various other vitamins and nutrients in it, which in turn helps keep it from becoming too diluted. However, even this isn't certain. Again, detoxification is highly dependent on some factors, and has no chance of working if you don't have several days to work at it.