Sorted By Test Name - Mayo Medical Laboratories

BARBU
80372
BGRS
82785
2 0.70-3.49 Positive
3 3.50-17.4 Positive
4 17.5-49.9 Strongly positive
5 50.0-99.9 Strongly positive
6 > or =100 Strongly positive Reference values
apply to all ages.
Clinical References: Homburger HA: Allergic diseases. In Clinical Diagnosis and Management by
Laboratory Methods. 21st edition. Edited by McPherson RA, Pincus MR. WB Saunders, Publ, New York,
Chapter 53, Part VI, pp. 961-971, 2007
Barbiturate Confirmation, Urine
Clinical Information: Barbiturates represent a class of drugs that were originally introduced as sleep
inducers. Butalbital is also used to control severe headaches. Mephobarbital and phenobarbital are
frequently used to control major motor (grand mal) seizures. These drugs are commonly abused as
"downers" to induce sleep after an amphetamine- or cocaine-induced "high."
Useful For: Detecting drug abuse involving barbiturates such as amobarbital, butalbital, pentobarbital,
phenobarbital, and secobarbital
Interpretation: The presence of a barbiturate in urine at >200 ng/mL indicates use of 1 of these drugs.
Most of the barbiturates are fast acting; their presence indicates use within the past 3 days. Phenobarbital,
commonly used to control epilepsy, has a very long half-life. The presence of phenobarbital in urine
indicates that the patient has used the drug sometime within the past 30 days.
Reference Values:
Negative
Positives are reported with a quantitative GC-MS result.
Cutoff concentrations:
IMMUNOASSAY SCREEN