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Doctor insights on: At Home Drug Test Vs Lab Test

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If I took an at home drug test that came out negative, will I pass the lab test?

If I took an at home drug test that came out negative, will I pass the lab test?

Not necessarily: Lab test may be more sensitive or test for more substances. ...Read more

Dr. Hirenkumar Italia
4 Doctors shared insights

Laboratory (Definition)

Is facility that provides controlled conditions in which scientific research, experiments & measurements are performed. An example is medical (clinical) lab where tests are done on clinical specimens in order to get info. About the health of a patient in terms ...Read more


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What's the time detection difference with home drug test and test from labs with specialized equipment?

What's the time detection difference with home drug test and test from labs with specialized equipment?

Depends: The elimination time for various drugs is very different. Whether one considers a test to be positive or not, also depends on the threshold for the positivity. Lab tests are more sensitive than home tests, but it is not feasible to provide a general statement of the time difference for detection by the two methods for the multiple drugs of abuse. ...Read more

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I had a random drug test today which is being sent off to a lab. 15 minutes later I picked up an at home test and passed. Is it likely I passed?

I had a random drug test today which is being sent off to a lab. 15 minutes later I picked up an at home test and passed. Is it likely I passed?

Yes: This depends on the sensitivity of the chemical assay system employed. Most commercial drug testing systems are not terribly sensitive, approximating those available in home kits. A minority are more sensitive and might be positive when the home kit is negative. ...Read more

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If I took a home drug test for cocaine and passes will that sample pass at the lab also?

If I took a home drug test for cocaine and passes will that sample pass at the lab also?

Depends on…: Whether lab uses same test or a different one that tests for Cocaine metabolites or is more sensitive than the home variety. Perhaps best to seek detox program so u don't have to worry about passing drug screen tests. Your pcp may b able to recommend some good programs. ...Read more

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Recently I was overwhelmed and took a lorazepam that wasn't (.5 mg) mine. If I passed an at home drug test would a pass a lab Corp drug screen?

Recently I was overwhelmed and took a lorazepam that wasn't (.5 mg) mine. If I passed an at home drug test would a pass a lab Corp drug screen?

It takes time: To metabolize a lorazepam which is one of the benzodiazepines that has the longest half life. So time is the only factor that determines whether the drug will be out of your system before you take the LabCorp drug test. I would not hang my hat on the home test. ...Read more

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Is an initial immunoassay screening in a lab as accurate as a home drug test?

Is an initial immunoassay screening in a lab as accurate as a home drug test?

Lab Usually more: Accurate. Lab tests are generally more accurate than home tests. Lab also has the means to get confirmatory testing on samples that test positive on screen. ...Read more

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Please tell me what does a drug test at the lab consist of?

Drug test: If you mean testing for certain drugs commonly abused, this can be done using blood, urine, or hair. If you give a urine specimen, someone will need to go to the restroom with you to make sure the sample comes directly from you without tampering. ...Read more

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If I passed the quickscreen drug test, will I pass the lab one?

If I passed the quickscreen drug test, will I pass the lab one?

It depends.: First, it likely depends on the drug being tested. There are many kits for many drugs out there. Next, these kits are likely not as sensitive as the lab test, so even if the kit tests negative for your drug, it does not mean the lab test will be. In any case, a confirmatory lab method, like gas chromatography should be done before calling someone positive or negative for any drug, etc. ...Read more

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What are the differences in a lab drug test and a strip drug test?

The strip drug test: Is an immunoassay performed in the office and may have multiple agents which can cause a false positive test. A lab drug test is either on a liquid or gas chromatograph and a mass spectrometer. This test produces the chemical signature of the drug or chemical and has virtually no false positives and is much more sensitive and specific. ...Read more

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Is the initial immunoassay in a lab as accurate as a drug test?

Sensitivity &: Specificity. Inital screening tests, usually immunoassays are set at high sensitivity and have some false positive results. Confirmatory tests have high specificity, but are not suitable as screening tests. ...Read more

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How would a person be almost certain to pass a state issued urine drug test being sent to a lab in less than 12 days?

Drug test negative?: The best way to assure a negative toxicology screen doesn't involve any "hack". The best bet, by far, is maintaining abstinence. If you are struggling with addiction or a substance use disorder, seek treatment today. ...Read more

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I smoked pot only once 70 days and have a lab drug test tomorrow. Will I pass? I weight 160 and I'm 5'11, athletic and have a high metablosim.

Likely: Of all the illicit drug THC takes the longest to clear from the body. If you did not take any pot for 70 days and were not near other people smoking pot, your urine should be clear. ...Read more

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I took a pre employment hair drug test Friday. The hair sample was recieved at the lab on Monday morning. Today they are saying it's still processing?

Hair drug test: I took a pre employment hair drug test Friday. The hair sample was recieved at the lab on Monday morning. Today they are saying it's still processing? ANS: I am not certain what the question is. Do they do analysis every day. How long does it take to do it. I would ask the lab how long it takes. It will depend on which test they do. ...Read more

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Does benzyl alcohol show up on a lab drug test?

Does benzyl alcohol show up on a lab drug test?

No: It is metabolized to hippuric acid which will not show up on a urine test. ...Read more

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If I use fake urine for a drug test. And actually got a bit of cocaine in the urine sample, will it test negative in lab since there are no metaboli?

What a mess: I don't know if anyone can answer you w/ certainty. I'm usually opposed to drug testing (when it's to help you in rehab or part of probation/parole, it's good or okay) but you're doing some messy things and few get away w/ that way of living for long.
Many would say you're unconsciously making a cry for help by messing up so badly. Are you? ...Read more

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I had a sip of Tussin CF cough syrup. Will I fail a drug test (dip stick or lab) 24 hours after?

I had a sip of Tussin CF cough syrup. Will I fail a drug test (dip stick or lab) 24 hours after?

Maybe: This medication may interfere with certain medical/laboratory tests (including urine 5-HIAA/VMA levels, brain scan for Parkinson's disease), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
...Read more

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Can I possibly test positive for something? I was told I had a plus 1 on my drug test and it would be sent to the lab. I do not do any drugs besides take Claritin-D 24 hour.

Can I possibly test positive for something? I was told I had a plus 1 on my drug test and it would be sent to the lab. I do not do any drugs besides take Claritin-D 24 hour.

Once the results: Return - you can determine if the rerun test showed anything. Some things can cause false positives on drug screen panels. But you will need to see what it was positive for before you can see if that might be the cause. ...Read more

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Does clonazepam and Xanax (alprazolam) show. Up the same as a benzo on a drug test that is sent to the lab?

Does clonazepam and Xanax (alprazolam) show. Up the same as a benzo on a drug test that is sent to the lab?

We are not here...: ...to help people pass drug tests. This is an ethical site. If you are taking these medications with a legitimate prescription from your physician, there should be no problem. ...Read more

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Husband has precription for lortab but took a suboxen strip one week ago. Drug test at work pos. For opiates and sent to lab. Will the suboxen show up?

No: The Suboxone will not show up as an opiate on a drug test. Suboxone will cause a positive test result for Buprenorphine (the active ingredient in suboxone) but that is only if the lab specifically tests for it. After a week, one film strip should not cause a positive result. ...Read more

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I'm perscribed suboxone and my dr offices calims I fail a drug test for loratab. And this was sent to a lab (52 was the level) & I havent. Any idea why?

I'm perscribed suboxone and my dr offices calims I fail a drug test for loratab. And this was sent to a lab (52 was the level) & I havent. Any idea why?

Pain Manag: When you are being treated for pain management or to detox from narcotics. Drs will screen your system to make sure your taking prescribed drugs & to make sure nothing else is being taken. The test identifies the metabolites of a drug which is processed by your body which in fact stays longer in your system. Lortab is a name brand you must of had hydrocodone in your system the test is 99% correct. ...Read more

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I took a drug test for probation yesterday I have a scrip for adderall ran out and took vyvanse (lisdexamfetamine) can they tell the difference on a lab tests?

I took a drug test for probation yesterday I have a scrip for adderall ran out and took vyvanse (lisdexamfetamine) can they tell the difference on a lab tests?

No: But it is against the law to take someone else's prescrtion medication. You are still risking your parole because they can look on the state registry and find the full dates for your prescription. Be perfect with your medication. They can even ask for pill counts!! ...Read more

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Would a drug testing lab require that the door be left open during the actual urine specimen collection?

Would a drug testing lab require that the door be left open during the actual urine specimen collection?

Maybe: I haven't seen anybody leave the door open but some will require that an attendant be present during collection. Some will check the temperature of the urine to make sure that you didn't bring anything from home provided by somebody else. ...Read more

Dr. Alan Wartenberg
586 Doctors shared insights

Drug Testing (Definition)

It is the process of examining body fluids or tissue for evidence of chemicals taken or not taken. It does not diagnose addiction however this a ...Read more