i have a son that takes percocet,s and xanax and i want to drug test him so i need to no how long it stays in him
28 Sep 2012
48 hours for the Percocet and about 10 hours for the Xanax. His age and activity level are also a factor. I weigh 210 lbs. and am not very active, but in a recent drug test I did not test positive for either drug because I had used all my Percocet 2 days earlier and had taken Xanax before I had gone to bed the night before. I hope this is helpful.
30 Apr 2012
In an obese group of subjects the half-life of Xanax (alprazolam) ranged between 9.9 and 40.4 hours (mean=21.8 hours, n=12) as compared to between 6.3 and 15.8 hours (mean=10.6 hours, n=12) in healthy subjects. The half-life of alprazolam is approximately 25% higher in Asians compared to Caucasians.
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