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Urine Amphetamine / Methamphetamine Screen
Test CodeUAMPT
Alias/See Also
Speed, AMP, Amphetamine Screen Urine
Preferred Specimen
15 mL urine (2 mL minimum)
Instructions
Freshly voided urine specimens should be used for testing. No additives or preservatives are needed. Adulteration of the urine specimen may cause erroneous results. If adulteration is suspected, obtain a fresh specimen. Deliver specimen to laboratory immediately.
Transport Container
Urine collection cup
Specimen Stability
Room temperature: 4 hours, Refrigerated: 24 hours, Freeze if storage for longer than 24 hours is required.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Do NOT use boric acid as a preservative.
Limitations
• A positive result suggests the likely presence of amphetamines but does not indicate or measure intoxication.
• The presence of amphetamines in urine is only an indication of recent exposure to or use of amphetamines.
• The psychological and physiological effects of amphetamines do not necessarily correlate with urinary concentration.
• A positive AMPH result suggests the likely presence of drug and its metabolites. The AMPH method cannot fully quantitate the concentration of individual components.
• Interpretation of results must take into account that urine concentrations vary extensively with fluid intake, and other biological variables.
• There is a possibility that other substances and/or factors not listed above may interfere with the test and cause false results, e.g., technical or procedural errors.
• The presence of amphetamines in urine is only an indication of recent exposure to or use of amphetamines.
• The psychological and physiological effects of amphetamines do not necessarily correlate with urinary concentration.
• A positive AMPH result suggests the likely presence of drug and its metabolites. The AMPH method cannot fully quantitate the concentration of individual components.
• Interpretation of results must take into account that urine concentrations vary extensively with fluid intake, and other biological variables.
• There is a possibility that other substances and/or factors not listed above may interfere with the test and cause false results, e.g., technical or procedural errors.
Reference Range
None detected
Clinical Significance
Amphetamines are central nervous system stimulants. The term “amphetamine” includes many drugs, but the most common are d-amphetamine, d-methamphetamine (the N-methyl derivative of amphetamine), and d,l-amphetamine. Measurements obtained are used in the diagnosis and treatment of amphetamines use or overdose.
