AMPHETAMINES BY GC/MS URINE
- AMPHETAMINES BY GC/MS URINE
- Start Date
- Expiration Date
- Amphetamine; Methamphetamine; Speed; Ice; Crank
- CPT Codes
- Reference Test
- Transport Info
- Fasting Required?
- Patient Instructions
- Reference Range
Negative (less than assay limit of detection)
Gas Chromatography/Mass Spectrometry (GC/MS)
Confirm positive screen results by an alternate, specific method; detect use.
Amphetamines and amphetamine derivatives are classified as sympathomimetic amines with CNS stimulant activity. They have been classified as a Schedule II drug in the U.S. since 1969, and currently may be prescribed to treat narcolepsy, obesity and childhood deficit attention disorders. Amphetamines can be taken orally, injected intravenously, smoked, or snorted. They are psychologically and physiologically addicting; their effects include excitement, alertness, euphoria, decreased appetite, and reduced sense of fatigue. Side effects at low doses include irritability, anxiety, insomnia, blurred vision, increased blood pressure, and heart palpitations. Chronic, high dose users may develop a psychosis that can be indistinguishable from acute schizophrenia. Amphetamines are rapidly absorbed from the gastrointestinal tract and widely distributed through the body. Approximately 70% of a dose is eliminated in urine in the first 24 hours after administration, and depending on urinary pH, about 30% of the dose is excreted unchanged and the remainder as metabolites. Amphetamines may remain detectable in urine for 3-4 days after administration. Positive result indicates exposure to drug and does not necessarily indicate impairment.