How Long Does Xanax Stay In Your Blood?

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

Xanax is not an antidepressant, it is classified as anti-anxiety drug (anxiolytic).

Thanks for the advice cuz me and my dad have a blood test 2marrow to see whos taking alprozolam(xanax) and i kno i have been taking them and im not sure about my dad but when he said i had to take a blood test i just started guzziling green tea and water and i urinated alot and did it again and 5 hours just passed so i hope i dnt get caught cuz this will ruin everything for me... But ive been lowering my dosage because im REALLY trying to quit THANK YOU GUYS!!!!!!!!!!!!!!!!

Xanax is strictly a BENZO!!! It is only called an Anti-Depressant because some people suffer depression only because their anxiety disorder is so troublesome. Therefore when they take Xanax, it relieves the anxiety causing the depression to lift. Also, its half-life is NOT short at all. It's mean half life is 11.2 hours with a range of 6-26 hours.

Xanax is strictly a BENZO!!! It is only called an Anti-Depressant cause some people suffer depression only because there anxiety disorder is so troublesome. Therefore when they take Xanax, it relieves the anxiety causing the depression to lift. Also, it's half-life is NOT short at all. It's mean half life is 11.2 hours with a range of 6-26 hours.

I have known people to test positive for xanax for 2-4 weeks after taking last one, but they took a lot and were saturated. I have known people to take not very many and test positive for 1-2 weeks. I go to a methadone clinic and xanax is the big thing every drug tests dirty for up there so I have seen people take a lot and people take hardly any and the time limits they have tested dirty for the amount they have taken so I am not 100% or scientifically accurate but I do have a fairly good idea just from experience.