Can I Pass a Drug Test Fast?

Can I pass a drug test on the same day that I use drugs? This is a common question asked by people who are worried about being tested for drug use. The short answer is yes, you can pass a drug test on the same day that you use drugs. However, there are a few things to keep in mind.

How To Pass a Drug Test on Short Notice

The first thing you should know if you need to pass a drug test on short notice is that testing technology has advanced to the point where classic methods of faking a test, such as adding salt to your urine sample or using fake pee, are now mostly detectable. The ideal strategy is to prepare your body as far ahead of time as feasible by quitting drug use the second you learn you will have to take a test. If you don’t have enough time to wash away traces of drugs from your system, there are other techniques that you can try to resist the procedure. Read on to learn how to deal with a drug test on short notice, as well as the must-do’s for the morning or night before your drug test.

How To Prepare For a Drug Test

Give yourself as much time as you can. The closer you get to the test date, the better your chances of passing it become, since each test is only effective for a short period after drug use has stopped.  If you’re tested for drugs by your employer, you’ll probably be notified ahead of time. If you’re being investigated because you’ve been put on probation, your tests will most likely be done at a specific time. The typical amounts of time a drug stays in your system to trigger a positive drug test are as follows:

  • Marijuana: 1-7 days
  • Crack (Cocaine): 2-3 days
  • Heroin (Opiates) or Methadone: 1-3 days
  • Speed/Uppers (Amphetamine, meth): 2-3 days
  • Angel Dust/PCP: 7-14 days
  • Ecstacy: 2-4 days
  • Benzodiazepine: 1-4 days
  • Barbiturates: 1-3 weeks
  • Tricyclic Antidepressants: 2-7 days
  • Oxycodone: 1-2 days

Find out what sort of test you’ll be taking. Urine, blood, saliva and hair tests are the four forms of drug testing. The 5-panel test measures amphetamines, cannabinoids (marijuana, hash), cocaine (coke, crack), opiates (heroin, morphine, opium, codeine), and phencyclidine (PCP). It’s more difficult to fake tests than it was in the past, but knowing the distinctions between them might be beneficial in your unique situation. Here’s our breakdown:

  • The most frequent test type given by businesses is urine tests. The pregnancy tests are the most vulnerable since you have a short amount of time in which to provide a urine sample (unless you’re being watched) – and they’re the simplest to track.
  • If you’re stopped by the police and drug intoxication is suspected, they may do blood tests. If you’ve recently used drugs, this test is difficult to pass because it’s highly effective in determining how much is present in your body. However, if it’s been more than a week since you’ve used it, the test is more likely to come back negative than a urine test.
  • Saliva testing may be used in place of urine or blood tests since they are less invasive. They are less responsive than blood tests.
  • Hair tests are extremely difficult to fake. A laboratory examines up to 120 strands of hair for traces of illicit drugs. Because it takes between 2 and 4 weeks for a section of hair to grow long enough to test, a hair test can’t tell whether you used drugs in the previous two weeks. However, traces of drugs may remain in your hair for up to 90 days. This is an effective method to determine whether or not you’re a regular user since drug residues can stay in your hair for up to 90 days.

Try to figure out how much of the drug you’ve taken. You can pass a drug test the same day or the next if you use less than 500 milligrams of THC. The approach you take to pass a drug test is determined in part by how much of the drug you believe is still present in your body. If you’re just a casual marijuana user, it’s possible that the drug will be undetectable after a few days. However, even after 15 to 30 days of heavy marijuana usage, cocaine use, certain barbiturates, and other drugs may be detected.

  • The test you take will almost certainly read as positive if you’re a heavy or “chronic” marijuana user. However, if you’ve only used it a few times, there’s a good possibility that you’ll be able to flush your system and get a reading that shows no signs of pollution.
  • Remember that anything you’ve used in the previous 90 days (with the exception of the most recent two weeks) will show up if you’re subjected to a hair test.
  • If you took the drug no more than 2 hours before your test, you might be able to pass a same-day drug test (with the exception of marijuana and oxycodone, both of which will signal a positive test within 1 hour of use). Despite this, your best option is to avoid using drugs until after you’ve taken the test.


Passing a same-day drug test can be tricky, but you’re not completely out of luck. Companies like TestClear offer solutions such as dehydrated urine to help those in need of surprise tests.