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.
The half-life of Xanax is short, but it can be detected in your system through urine, blood, and hair testing. 1  In the case of repeated use, urine tests can detect Xanax for up to 5-7 days after the last time it was taken. 2  Blood tests can detect Xanax for up to 1-6 days after the last time it was taken.