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How Long Does Xanax Stay In Your Blood?

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Anonymous Profile
Anonymous answered

Xanax is a medicine that is used to help ease tenseness, anxiety and nervousness, and is prescribed by many doctors for individuals suffering with anxiety and depression. The drug is addictive, and works by slowing down the central nervous system. By slowing down the central nervous system and the part of the brain that controls emotions, an individual will feel less anxious and be affected less by the anxiety that might be a side-effect of several medical complaints.

Studies have proven that the immediate release tablets, Xanax, are able to show peak concentrations within the blood plasma between just one or two hours. The known average half-life of Xanax is 11 hours and 12 minutes. This time it takes the blood to eliminate half of the drug. 

Since only half the drug is metabolized every 11 hours and 12 minutes, the actual amount of time it takes for xanax to be undetectable in your bloodstream is dependent upon many factors, primarily the amount of xanax you take and the detection limits of the lab.  In 22 hours and 24 minutes (two half-lives), your body will have metabolized 75% of the xanax in your system. In summary, the more xanax you take, the longer it will remain in your bloodstream.

If you take Xanax XR, then it’s still about the same. This is an extended release kind of Xanax that has a slower absorption rate, but again, studies have shown time and time again that the drug takes about the same amount of time as normal Xanax to leave the body altogether.

Yooti Bhansali Profile
Yooti Bhansali answered
Xanax belongs to a category of drugs known as benzodiazepines. This family includes antidepressants like Valium and Librium. This category of drugs usually gives good results if taken at a correct dosage. The dosage depends from person to person, but if there is no sedation it would not usually be regarded as excessive.

Xanax is an addictive drug if used in a high dosage over a long period of time, and has the side effects of sedation and decreased agitation. It also causes withdrawal symptoms if stopped, and can even be the cause of seizures if stopped suddenly. One should consult the doctor and decrease the dosage gradually and then stop if one feels the need.

Xanax generally stays in the blood for around 24 to 36 hours, it can be detected in urine test for up to a week or so.
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Dave Cowles
Dave Cowles commented
Also note that there is a time released version of Xanax out (so they could quash the generics) and it would be called Xanax XR or the like. Now that would stay in even longer. Xanax though is not good for general anxiety IMO except in extreme cases since it's spike off effectiveness is sharp. Note the chart below and know that a Half-life is the time it takes a drug to go to 1/2 it's peak concentration, what is left then again falls to 1/2 in another half life. But in the chart Xanax is relatively short acting so the decreased anxiety can rebound on you and you'll possibly feel worse,...
============equ-dose=peak====1/2 life=
Alprazolam .5 XANAX 1 - 2 9 - 20
Bromazepam 3.0 .5 - 4 8 - 30
Chlordiazepoxide 25 1 - 4 24 - 100
Clonazepam 0.25 1 - 4 19 - 60
Diazepam 5 1 - 2 30 - 200 *
Estazolam 1 .5 - .6 8 - 24
Flurazepam 15 .5 - 1 40 - 250 *
Halazepam 40 1 - 3 30 - 96 *
Ketazolam 7.5 3.2 30 - 200
Lorazepam 1 2 4 8 - 24
Nitrazepam 2.5 .5 - 7 15 - 48
Oxazepam 15 2 - 3 3 - 25
Prazepam 10 2.5 - 6 30 - 100
Quazepam 7.5 1.5 39 - 120 *
Temazepam 10 Zestril 2.5 3 - 25
Triazolam .25 1 - 2 1.5 - 5
NOTE: Temazepam is short ie used for sleeping pills
Anonymous
Anonymous commented
Xanax is not an antidepressant, it is classified as anti-anxiety drug (anxiolytic).
Anonymous
Anonymous commented
I have been a psychiatric nurse for twenty years and just wanted to say that benzodiazapines are not antidepressants. Valium and librium are tranquillizers and are now mainly given for detox from alcohol[eoth].
Check your facts since you have taken upon yourself to "teach " others. It can mean life and death at times.
Anonymous Profile
Anonymous answered
Just to clarify, Xanax-the brand name, also known as Alprazolam-the generic name. Is indeed a Anxiolytic. It is not an Anti-depressant. It is sometimes used in conjunction with anti-depressants due to the high number of people that have anxiety with their depression. The time that it will remain in the system really depends on how much and how long you have taken it. If there is any serious question about how long it is in your system, maybe you should re-evaluate your use of the medication.

When posting these comments please be careful about the information that you give, because some people will believe anything that they read. This can be very important because one should have the proper education before replying in regard to medication, dose, use and side-effect.

B. H. Wells, Pharmacist PhD
Anonymous Profile
Anonymous answered
I work in a forensic toxicology lab. One thing you have to keep in mind is the immunoassay they do first in urine screens test for a broad amount of stuff but it's just giving a yes or no. So they test benzodiazepines in general. Since a positive is met by reaching a certain threshold of it in your system, it'll go by the amount of drug taken milligram-wise. People who take Valium often test positive simply because they have to take 20mg to equal 1mg of Xanax. Xanax users, especially people taking 1 mg or less a day will often not show up on this test simply because they set the same threshold on all benzos regardless of the normal dosage. If a person comes up negative on this test, they'll never do a quantitative test to pinpoint the exact drug in your system.
Anonymous Profile
Anonymous answered
I am pregnant and last wk I took a piece of a 3mg xr on wed. And thursday. I could go into labor at anytime... I took a in home urine test yesterday and it was negative. But the line was very light. When I go to deliver they take blood... Is it out of my system if I've been drinking' a lot of water
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Anonymous
Anonymous commented
They wont test the baby unless there is a drug abuse issue, no worries if you not a junky!
Anonymous Profile
Anonymous answered
Ive always heard 3 days but was recently tested after last time use was about 25 days ago and I still came up dirty for it I weigh about 185  5'8 and was taking about 3 -6 a day for about 14 days... Hope this helps some people to not break probation like did
Anonymous Profile
Anonymous answered
Xanax contains alprazolam which is benzodiazepine. If you are taking xanax as prescription drug then positive test will not harm you. Because drug test can differentiate between therapeutic use and drug abuse. Single dose of xanax can be tested in blood for 6-48 hours and in urine, 3 days for therapeutic use and 4-6 weeks for chronic use.
Anonymous Profile
Anonymous answered
I took like 4 xanax like about a month or so ago and I'm joining the military and I been Woking out hardcore and lost 17 lbs should I be good
Anonymous Profile
Anonymous answered
A rough guide to how long something stays in your system is to multiply the half-life by 7. Only a few substances will vary according to the amount or length of time you use, and the ones that do are typically ones that are stored in fatty tissue (like marijuana). No amount of water or green tea or hot showers or exercise whatever will lessen the amount of time it stays in your system.
dave russo Profile
dave russo answered
How could xanax be a benzo if its an antidepressant? Its a benzo, that's it. Xanax is a benzo with a very short half life. It could be out of your system in 2-3 days with a half life of 6-12 hours. It is actually bettter than other benzos in terms of half life. For example, the half life of valium is 20-100 hours and if you take it regularly, can accumulate in your system and be detectable for up to 2 weeks or more.
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Anonymous
Anonymous commented
Back in like 1984 shortly after Xanax became the first TriazaloBenzodiazepine to be approved in the US by the FDA, Abbott Pharmaceuticals, the company that invented, it thought that TriazaloBenzodiazepines versus the traditional 1,4-Benzos might have some antidepressant efficacy. They even off label promoted this unproven hypothesis to Psychiatrists. I know a person who was given Xanax while having severe anxiety issues concurrent with "atypical" depression in a clinical study that went on to prove that it did not work as an antidepressant in virtually all depressions.
That is the origin of the myth, as far as we can tell, 30 years plus later, that Xanax can have antidepressant efficacy.
There remain differences though between TriazaloBenzodiazepines and traditional 1,4 Benzos that indicate the TriazaloBenzodiazepines are not as likely to cause an underlying or concurrent depression to grow worse.
Just like some SSRIs are used for certain anxieties by their actions on serotonin, some Benzos and other gabaneric acting drugs can perhaps help with depression.
A 2004 study at The Univ. of Pennsylvania demonstrated that pregabalin at higher doses was an anxiolytic.
Also it is no tip uncommon in the US for MDs to augment therapy for anxiety with Gabapentin. In The EU pregabalin, Lyrica is approved for use against anxiety.
Pregabalin, much like Xanax, is a drug that acts of the GABA receptor complex .
Anonymous
Anonymous commented
I meant GABAnergic drugs working on anxiety not depression
Anonymous
Anonymous commented
For the uninformed, Benzos are GABAnerically acting drugs.
Anonymous Profile
Anonymous answered
I'm was using 6 x 2mg a night to go to sleep it was not working any more I quit in 1day . So lets see the site effects now
Anonymous Profile
Anonymous answered
In my experience of recreational use  it will leave your system in 2-3 days ...ill take xanax for up to three days before a test and be fine if I stop three days before...but remember I'm not talking about binging I'm talking about maybe one or two days of use
Kira Smart Profile
Kira Smart answered

Info from Google:

Since Xanax has a half-life of around 12 hours, most users will have the drug out of their systems after 4 days. Urine tests can detect Xanax for up to 5-7 days after the last use. Saliva tests can detect Xanax for up to 2.5 days after the last use.

More info on Canada Drugs Direct

Anonymous Profile
Anonymous answered
Normally it stays in your system at least 7-10 days, depending on how much water you drink and how much fat tissue you have.

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