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There are so many answers in this thread it is baffling. Some of the answers are accurate, semi-accurate and some are just down right wrong. It all depends on what test is used. The most widely used lateral flow immunoassays are calibrated for oxazepam at 300 ng/ml of urine. If it is positive they generally send it off for GC/MS testing. As someone already clearly stated what clonazepam breaks down to it would be redundant for me to do into that. Clonazepam does not metabolize to oxazepam. However, large doses over a period of time can lead to a positive immunoassay, ususally around 781 ng/ml of Clonazepam. The amount of actual non-metabolized clonazepam released in urine is less than 1-2%.

In a chronic low-dose user (less than 3mg per day), many test negative on immunoassay. Single dose users, dependent on dose generally test negative on immunoassays. If an immunoassay is calibrated toward 7-aminoclonazepam and clonazepam (they are available) they would produce a positive.

When expensive GC/MS testing is done due to a positive BZO lateral flow, the lab needs to know to look for Clonazepam and 7-amino clonazepam.

In sum, if someone stays off clonazepam for a few days, the likelyhood of a positive test by most used lateral flow immunoassay would be very slim. So, it would techinally would be a "false-negative" because the lab could detect it if looking for it with GC/MS. There is much literature online one can review. Academic literature is more accurate than others info. Alot of what people put out there is incorrect and/or incomplete.

Answer:

The short answer is: Stop taking the drug and wait. It'll be gone in a few days.

The catch is that, like all benzodiazipam category drugs, if you've been taking it for more then a month then you'll need to taper off slowly because of withdrawals (although extremely rare, 2 deaths have been attributed2).

Answer:

Not only can a drug test detect Klonopin, it can also measure the level, or amount of drug in the body.

Answer:

Klonopin® (generic: Clonazepam) is a benzodiazapine used to treat anxiety and panic disorders. It has a half-life of anywhere from 18-50 hours, meaning that is how long it takes your body to reduce the amount of clonazepam in your system by half.

If you took three 1 mg tablets, within one to two days, 50% of its major metabolite 7-aminoclonazepam (7-ACLO) will still be in your system, and detectable by urinalysis; within three to four days, 75% of the metabolite will have cleared; within five to six days, 87.5% will have cleared, and so on.

Unfortunately, because the rate of metabolism varies from person to person, the concentration of 7-ACLO measurable in the urine doesn't necessarily decline in a direct linear fashion. You may show peak concentration, the point at which the metabolite is highest and most easily detected, anywhere from the first to the eighth day after taking the drug. Depending on the sensitivity and specificity of the test, one 3 mg. dose of clonazepam is detectable in urinalysis at 14 days; and there is a 75-80% chance of it being detectable at 21 days. It may take 28-30 days for the medication to clear your body completely.1

Most likely, a low-cost employment or other screening test won't be sensitive enough to pick up the one-time use anywhere near that long (the above data came from a forensic study). A drug detection timetable for short-term use of benzodiazapines suggests you should be able to pass a drug test after 5-7 days (the upper end of the time line). This is not a guarantee, however.

Since benzodiazepines are metabolized by the liver and excreted in the urine, drinking a lot of water may help slightly, but won't increase the speed at which your body metabolizes the drug.

This information is intended for educational purposes only and should not be considered medical advice.

1 Elimination of 7-aminoclonazepam in urine after a single dose of clonazepam

2 Source: http://journals.lww.com/amjforensicmedicine/Abstract/2009/06000/A_Fatal_Case_of_Benzodiazepine_Withdrawal.14.aspx

Accudiagnostics

I will do further checking of the medical journals later and repost my reply. I have been taking 4mg of Clonazepam (Klonopin) since my auto accident in 2006, when my car flipped, rolled 3 times, my airbag did not deploy, my seat-belt was on, and I had a fractured skull, vertebrae, and 5th metatarsal. I have Cerebral Palsy, which was mild until my accident. After my accident, I developed hammer toes and increased shakiness, etc. My doctor prescribed this medication and kept increasing the does until the problems that kept me from functioning and sleeping disappeared (yes, she was amazed that I tolerated the dosage without falling asleep in her office). A little less than 3 years ago, I moved to PA and found a new physician. I take 2mg of Clonazepam around 6A.M. and see my doctor in the afternoon and ALWAYS fail the urine test. I am researching to discover why (I am uncertain as to what type of urine screen they do, but was assured that it should show up in my urine). This has caused me a great deal of difficulty but one day, after my doctor's staff did not give her my messages about refilling my Rx (they were buried under papers on top of my file), I showed up at her office in withdrawal (my BP was around 160/130 something and pulse was in the 120s, and I felt awful. I can guarantee you that 8 hours after taking 2mg of Klonopin/Clonazepam that it did not show up in the urine tests. I am dealing with a new doctor at this clinic since November, and was told Wednesday (after calling about my refill Friday, Monday and Tuesday) that they would not refill my Rx, would not do any further tests and wanted to see me in 3 months. I requested a copy of my medical records, went to the ER (my BP was up again), I failed the urine test there, they gave me 2mg last night, watched me take it, checked my mouth (all at my request) and I am returning for another test this morning, which I know I will fail again.

"Insensitivity of benzodiazepine screen: only 40% for lorazepam; clonazepam (Klonopin) frequently negative on both EIA and GCMS."

Source: http://www.med.umich.edu/1info/FHP/practiceguides/pain/drugtesting.pdf

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12y ago
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11y ago

Klonopin is usually excreted out of the body within 72 hours. The half life is 35 hours so the total is 70 hours which is almost three days.

that is completely wrong. a half-life is how long it takes half of what is left in your body out. and the halflife of klonopin is anywhere from 18-50 hours. so one half life would be 50 percent, the second half life would leave 25 percent, the third 12.5 percent, and so on.

The second paragraph is correct. Half-life is strictly how long it takes for your body to 'get rid of' (to use layman's terms) half of WHAT IS LEFT IN THE BODY. This is why a graph depicting the amount of a given drug left in your system would be exponentially curved (think of a skateboard ramp) NOT a straight, diagonal line (think if you separated an X into its two lines, it would be the one that starts at the top left and slopes downward to the right).

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11y ago

the half life is 35 hours so the total is 70 hours which is almost three days\

A half of a half is a quarter.

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Q: How long does Klonopin in system?
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Related questions

How long does Klonopin 1mg stay in your system for?

That's a lie


Can you get Klonopin out of your system in 24 hours?

No you can\'t get Klonopin out of your system in 24 hours. It usually takes 48-72 hours to get Klonopin out of your system.


How long Klonopin takes to enter system?

Klonopin is usually fast acting. When used to treat panic disorders, it sometimes takes a period of days to become effective.


If you take 2mg of klonipins how long before you can pass a urine test?

Klonopin is a benzo They have a long half life. for at least a couple weeks


How long does Klonopin last?

2mg klonopin, how long does it help a panic attack


Will 1 1 mg Klonopin takin a month ago show up in a GCMS test?

No. The class of drugs that klonopin belongs to do stay in your system for up to a couple of weeks. One pill a month ago is long gone from your system.


How do you clean system of klonopin?

There is no effective way to clean Klonopin out of your system. Depending on how much you have taken, it can take up to several weeks for it to completely clear out of your body.


What are the long term urine levels of Klonopin?

2-3 days and klonopin is out of your system. My doctor just did a urine test and told my that I'm not using them and I am. Told him that I don't always use them everyday and is said " there is a 2-3 day window with klonopin so you haven't taken in at leas 2 days" Hope that helps you.


Does xanax stay in your system longer than Klonopin?

Xanax is used for anxiety disorder and Klonopin can also be used for the same thing. Xanax should be out of your system in 5 to 8 days.Klonopin can stay in your system for 24 to 48 hours.


Does sweating and drinking water help Klonopin get out of your system faster?

yaya


How long does 1 mg of Klonopin stay in your system?

Klopin's half life is 18 to 50 hours. If one takes 1 mg Klopin, 0.5 mg stays in the system for 18 to 50 hours, and the other 0.5 mg of Klopin will be out of the system in another 18 to 50 hours.


How long does Klonopin stay in urine?

3-5 days