any member of the subphylum Crustacea (phylum Arthropoda), a group of invertebrate animals consisting of some 45,000 species distributed worldwide. Crabs, lobsters, shrimps, and wood lice are among the best-known crustaceans, but the group also includes an enormous variety of other forms without popular names.
It is thought that infrequent, low-dose users may test positive for Xanax within urine for up to 4 days post-ingestion. Frequent, high-dose users of the drug may test positive for Xanax after a full week post-ingestion via a urinalysis. Results from a urinalysis can be confirmed with technology such as GC/MS.
For most people, Xanax peaks in the body within one to two hours of taking the drug. For Xanax XR, there is a slower absorbtion rate of five to 10 hours. However, both versions of the drug tend to remain in the body for the same amount of time.here is some debate as to how long Xanax stays in your system. First of all, it's important to note that with any drug, this answer will vary. However, there some things that can be taken into consideration.