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.
Like most drugs, Xanax has a limited duration once it is ingested. Normally, Xanax stays in a personâs system for approximately 6 hours. Depending on the personâs weight, that period can extend to 10 hours. If the person is morbidly obese or has liver problems Xanax can linger on in their system for about 40 hours.