How Long Does Xanax Stay In Your System?


Asked by francis clickenger

How Long Does Xanax Stay In Your System?

When taking a small dosage on xanax, how long will it last in your system? How will long you feel the effects?


Hi Francis,

Studies have shown that Xanax (alprazolam) immediate release tablets show peak concentrations of the drug in blood plasma after about one to two hours. The average "half-life" of Xanax, which means the time it takes the blood to eliminate half of the drug is 11.2 hours (with a range of 6.3 to 26.9 hours).

Xanax XR is an extended release version of the drug. It has a slower absorption rate, in that the body maintains a constant concentration of the drug 5 to 10 hours after you take it. However, studies are showing that elimination of the XR version is about the same as the immediate release.

You didn't say why you asked this question, but if you have taken Xanax recently and are concerned about its effects on your body I urge you to contact your doctor as soon as possible and express your concerns.


Dr. Jennifer Fee

You should know: The answer above provides general health information that is not intended to replace medical advice or treatment recommendations from a qualified healthcare professional.