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.
Xanax doesnât clear the body as quickly as many other drugs. In fact, Xanax can be detectable in urine for up to 6 weeks in heavy users. Plus, the main ingredient in Xanax (alprazolam) takes a fairly long time to absorb once itâs in the body, so even small doses can be detectable for over a week.anax is absorbed quickly in the body and reaches its peak levels in the blood within one or two hours. These plasma blood levels vary depending on the dose taken, but range from 8-37 ng/mL. The half life of Xanax in healthy adults averages 11 hours. In elderly subjects the half life of Xanax is higher, about 16 hours.