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Doctor insights on: What Drugs Will Show Up On A Hair Follicle Drug Test

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Could hydrocodone or other synthetic opioids show up on a hair follicle drug test?

Could hydrocodone or other synthetic opioids show up on a hair follicle drug test?

Yes: Hair follicle drug testing is very reliable in identifying chronic or past drug use, and hydrocodone and other synthetic opioids are commonly tested for. Drug testing with hair 4-6 times more likely to identify drug abusers than urine drug testing. Hair tests do not detect recent drug use but do detect use that which occurred 10 - 90 days prior to the test. ...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


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Will hydrocodone or other synthetic opioids show up on a hair follicle drug test?

Will hydrocodone or other synthetic opioids show up on a hair follicle drug test?

Yes: The test done on hair will reveal both of those. The test employed for fentanyl is more expensive but highly sensitive and accurate. ...Read more

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2a, 3a-epithio-17a-methyletioallocholanol, will it show up as anything on a hair follicle drug test?

2a, 3a-epithio-17a-methyletioallocholanol, will it show up as anything on a hair follicle drug test?

Maybe: Drug testing for pro (steroid) hormones is getting increasingly sophisticated. But the side effects of using spawn and its relatives are dire. The best advice i could give anyone using it is "don't". I hope you ask having stopped, if you have been using it. If you haven't please don't take offense at my concern. ...Read more

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I have a job interview and have to have a hair follicle drug test. Will celexa and one Xanax (alprazolam) show up?

I have a job interview and have to have a hair follicle drug test. Will celexa and one Xanax (alprazolam) show up?

Probably not: Celexa may, if they were testing for it, but they usually only test for whatever "illicit" substances they list. One Xanax (alprazolam) would not usually come up in commercially available hair tests. If you mean one Xanax (alprazolam) per day, then it would - one Xanax (alprazolam) ever would not. ...Read more

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Will focalin (dexmethylphenidate) give a positive result for meth on a hair follicle drug test?

Will focalin (dexmethylphenidate) give a positive result for meth on a hair follicle drug test?

No: Hair follicle tests are not just screening tests. They always have a full confirmation for the exact drug. ...Read more

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How sensitive is a hair follicle drug test?

Very: In comparison to a urinalysis drug test, cocaine, PCP, opiates, and methamphetamine have proven hair analysis far more effective than urine testing in identifying low-level drug use over an extended period of time since these are normally out of the bloodstream in within 3-7 days The detection of marijuana is currently less sensitive than the other drugs in identifying low level drug users, ...Read more

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How much time should I wait for a hair follicle drug test?

How much time should I wait for a hair follicle drug test?

Dont understand ?: Why would YOU be waiting for a test. Hair follicle tests are done by employers and other authorities to determine if someone has used drugs over a long period of time. Depending on the length of hair they sample, it can detect use up to 6 months back or longer. If you are due for a test, even if you stop using drugs now, it can be detected 6 months later. Get help for your drug problem please. ...Read more

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Will i pass a hair follicle drug test if i smoked almost 40 days ago?

Might get picked up: Hair testing for drugs can show positive results for up to 90 days in the past. ...Read more

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How much THC is detectable in a hair follicle drug test?

Longest window of de: Hair test offers the longest window of detection.That is 90 days in a standard test
test does not detect the amount but presence of thc.The testing method measures drug molecule embedded in the hair shaft and not hair follicle. ...Read more

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To fail a hair follicle drug test does there have to be a certain number or amount of THC present or is it any amount that will fail you?

Positive test will: Once the test is positive means you had used the drug usually within a window of 90 days. ...Read more

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I was wondering how far a hair follicle drug test goes back. Why i was asking was because of a job, someone said they go back 6 months for this job?

About right: Depends on the length of the hair, but the average size hair will go back about 6 months. There is variability in hair growth, and depending on whether someone is fair-skinned or dark, the hair may retain certain drugs differently. But in general, its about 6 months worth. The larger question is whether an employer has any right to determine what someone does during off-time not working. ...Read more

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Can secondhand smoke from marijuana cause me to fail a hair follicle drug test?

Can secondhand smoke from marijuana cause me to fail a hair follicle drug test?

Probably not: This isn't the place to debate the wisdom of the cannabis laws. In the very unlikely event that this turns up positive, get a good lawyer and tell them what happened. ...Read more

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Should i be worried about taking a hair follicle drug test? I have some prescribed drugs for my acne.

Should i be worried about taking a hair follicle drug test? I have some prescribed drugs for my acne.

Don't worry: Drug tests look for particular drugs of abuse like narcotics and sleeping pills along with illegal drugs. Acne medications would not cause a positive test, but for any prescription drugs that are being taken properly there will never be a problem with a drug test. ...Read more

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I took 4 hits off a joint and I have a hair follicle drug test in a week, will i pass?

No you won't: Pot remains in the hair for 90 days. Your only hope would be that the amount in your hair is below the detectable limit in the test, but i would not count on it. Best wishes and please don't use at all. ...Read more

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A friend ask me how to pass a hair follicle drug test i said don't do drugs you fool is there a way mr or mrs doctor x?

A friend ask me how to pass a hair follicle drug test i said don't do drugs you fool is there a way mr or mrs doctor x?

Hair follicles: You gave your friend the right answer in saying "don't do drugs" -- that's the only reliable way to pass a drug test of any kind. Hair follicles will remain positive for varying periods depending on the drug in question. Cutting hair will also not completely get rid of the follicles, which are down into the scalp. Thc, for instance, would still remain in the follicles for at least 90 days. ...Read more

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Hi, i just took a hair follicle drug test for pre-employment it came up positive for both amphetimine and meth 1053 pgmg but ive been clean for a year?

Do you have very: long hair? While hair follicle tests enjoy a mixed reputation, when they do work accurately, its hard to refute to a potential employer. Most people take other tests that are shorter-acting (urine, blood), which is what you might ask your pre-employer to accept as proof that you are clear. ...Read more

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I dont ever smoke marijuana. But i took one hit from a joint 2 weeks ago. I have to take a hair follicle drug test in 4 days. will i pass it ?

I dont ever smoke marijuana. But i took one hit from a joint 2 weeks ago. I have to take a hair follicle drug test in 4 days. will i pass it ?

Hard to say: Hair testing is very powerful (1pg/mg) and reflects drug use over the past 90 days (depending on the length of hair available). A shaved head or razor cut might remove evidence of activity from 2 weeks ago. One hit may be too little to worry about, but I can't say I know. If it's very important - you might want to tell them the truth. This sounds like an unintended outcome if you're being honest. ...Read more

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I have been taking prescribed Adderall (dextroamphetamine and racemic amphetamine) 30mg XR for the past 6 years and have a hair follicle drug test tomorrow for a dream job. How will i test?

I have been taking prescribed Adderall (dextroamphetamine and racemic amphetamine) 30mg XR for the past 6 years and have a hair follicle drug test tomorrow for a dream job. How will i test?

Positive: Your test will undoubtedly be positive. You can take your prescription or a note from the doctor stating that you're taking this medication and depending on the job i don't really foresee it as being any sort of a liability. You must be honest with any employer however when filling out a job application. ...Read more

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What are the chances of passing hair follicle drug test?

That depends: On what drug you used and if it was a brief exposure (for some drugs). Some drugs may be detected from follicle for 90 days. ...Read more

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I have 3 to 4 weeks to pass hair follicle drug test, is that enough time?

Possibly not: Depending on the drug you took and the last time you took it, 3-4 weeks would not be long enough to clear it from your hair follicles. Most drugs are detectable in hair follicles for at least 90 days -- sometimes longer. ...Read more

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Have hair follicle drug test ever been wrong and is there honestly anyway you can beat one?

BE CONCERNED: With doing the right thing not with how to beat tests. Why would a doctor tell you how to "beat" a test? Honesty has nothing to do with your question. ...Read more

Follicle (Definition)

An ovarian follicle contains a hollow ball of cells with an immature egg in the center. It is a structure within the ovary containing the egg that ...Read more