Passing a drug test can be difficult if you have taken recreational narcotics near the testing period. Due to the nature of the tests, and the safeguards against avoidance, many tests will give you little to no time before you need to participate in the test.



If you have been taking recreational narcotics on the same day you are testing, passing a drug test will be virtually impossible. It takes very little time for banned prescriptions to work its way into your blood stream, which means that urine, blood and saliva tests will bare traces of those compounds. Hair tests might succeed, as it needs a certain amount of time for hair to grow.

If you have taken illegal medications, and passing a drug test is needed, you can try to drink high amounts of water to dilute your piss in hopes that the test is not accurate enough to sense the presence of the narcotics. While this might succeed on card based scans, gas tests can pick up even the smallest trace amounts of narcotics within your urine.

As many people have avoided banned prescriptions tests by bringing urine of a friend who is clean of drugs, there are now steps taken to prevent this from occurring. However, if you can sneak in someone else's urine sample into the test, passing a drug test when you otherwise will have failed is a possibility. If you are caught doing this, it will be treated as a fail with further consequences.

The only safe way to ensure passing a drug test is within your grasp is to make sure that you have not done any narcotics for at least a week prior to the narcotics screen. As most drugs have a in body life span of a week, it will take this long until the traces of the drugs are removed from your system. This will work on piss, blood and saliva screening.

In the case of hair based testing, passing a drug test after using recreational drugs is impossible unless you shave off all of the hair on your body. While some people attempt to shave their heads, this is not effective as all of the hair you produce will show your banned prescriptions use history. As the history spans for a period of six months, this can have devastating consequences for those being tested. Due to the nature of hair growth, the remnants of the drugs are never fully purged.

If passing a drug test is a large concern for you, you should research the lifespan of the drugs you take and learn out how long it takes for them to purged from your body.

If you take certain prescription medications, you will need to bring a evidence of prescription to your narcotics screening, as they can cause false-positive results on many types of banned prescriptions tests.