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It depends on the drug. An immunoassay for TCH, for example, may show traces for up to four weeks or longer, depending on the amounts used, weight of the user, and a couple of other factors. Others vary as well, generally below that length of time. A quantitative analysis, however, will determine how much is still in the system, and can be used to determine within certain limits how long since use occurred.

THC (Marijuana) is stored in fat, and takes a long time to be released.

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15y ago
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2w ago

The detection window for a urine drug test depends on the substance tested for. Generally, most drugs can be detected in urine up to a few days after use, but some substances, like marijuana, can be detected for several weeks.

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Q: How far back does the urine drug test detect?
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Does a DUI drug test detect fetynal?

Yes, a DUI drug test can detect fentanyl in a person's system. Fentanyl is an opioid drug that can be detected in standard drug tests, including urine, blood, and saliva tests.


Can a urine test detect how much of a drug is in your system?

A urine test can detect the presence of a drug in your system and provide a general estimate of the amount based on the concentration found in your urine sample. However, it may not always provide an exact measurement of the quantity of the drug present.


Would tap water poured into your urine cover up a drug test?

No, pouring tap water into your urine will not cover up a drug test. Drug tests are designed to detect specific substances in urine, and adding water will dilute the sample but is likely to be detected by the testing process.


Baking SODA and water to passs UA?

Baking soda and water are not reliable methods to pass a urine drug test. They can throw off the pH of your urine, but most modern drug tests can detect this and may require a retest or be flagged as tampered with. It's best to refrain from drug use if you need to pass a drug test.


How do they do drug testing for cocaine?

Drug testing for cocaine can be done through various methods like urine, blood, hair, or saliva tests. These tests can detect the presence of cocaine or its metabolites in the body depending on the timeframe and the specific test used. The most common method is a urine test, which can detect cocaine use for up to a few days after consumption.

Related questions

Do drug test detect birth control?

A drug test or a Urine test can detect just about anything that is in your system, whether it be legal or illegal. A drug test can detect whether or not you are taking birth control.


How does a urine test detect beer?

A urine test detects beer by looking for the presence of ethanol (alcohol) metabolites in the urine such as ethyl glucuronide (EtG) and ethyl sulfate (EtS). These metabolites are produced when the body breaks down alcohol consumed from beer, and can be detected in urine for up to 80 hours after consumption.


Can you cheat on a drug test?

if the drug test is on urine, then drinking lots of water will make it difficult to detect


Can they detect a detox cleanser in urine test?

Not for an employment purpose but they can for a court drug test


If you take Somatroph HGH will you test positive for drugs in a urine drug test?

No, a urine drug test has only recently been developed for HGH, any standard urine drug test will not test positive for it. This is amount of HGH in urine is miniscule, which is why it is so difficult to detect.


Urine drug test can you tell the difference between male and female urine and if so is it standard to check?

"yes you can tell if the urine is from a female or a male its a very simple process" The Urine Drug Test is usually an immunoassay for drugs, not a test to detect sex.


How far back can a urine test detect cocane?

72 hours


How long after being taken can a urine drug test detect hydrocodone?

24 to 36 hours


Why doesn't methadone show up in a urine test?

Typical illicet drug urine tests don't test for methadone since there is a specific test just for methadone to detect it.


Can synthetic urine be dectected in drug screen?

no they cannot detect synth urine in a laboratory drug test as I do it everytime.... as well, they seem to not be able to detect the presence of water as I dilute my saved urine with H2O to throw off the test and I seem to pass everyone....


How does the swab drug test work and how far back can it detect drug use?

it will only detect MAX 72 hrs


Does puff incense have THC?

No it will not show up on a conventional drug test....BUT there is a drug test (urine) that can detect the active ingredient in spice. See related link: