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.
According to experts in the health field the half-life of Xanax is approximately 12 hours. Xanax is a benzodiazepine, so it can be detected during a urine drug testing. This medication is detectable in urine between 3 days and even up to 5 or 6 weeks. Xanax detection times in urine highly depend on the frequency and length of use. For example, if you are an infrequent user, Xanax will go out of your body within a few days.