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If you have additional questions regarding this test, please call: 415-353-1667

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Amphetamine Screen, Urine

Item Value
Approval req'd? No
Available Stat? Yes
Test code AMPU
Test group Amphetamine
Performed by Parnassus & Mission Bay Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Competitive enzyme immunoassay method (Beckman UniCel DxC 800 analyzer) using G6PDH-labeling
Container type Urine cup
Amount to Collect See preferred volume
Sample type Random urine
Preferred volume 1 mL urine
Min. Volume 0.5 mL urine
Normal range Negative

Note: a negative result indicates that this class of drugs is not present, or they are present at a concentration below the cut-off concentration of 1000 µg/L
Stability Refrigerated 1 week, frozen at -20C 2 weeks
Turn around times STAT 2 hours, Routine 4 hours
Additional information A concentration of < 1000 µg/L is considered negative by this test. A positive result is ≥ 1000 µg/L and indicates the presence of this class of drugs. This immunoassay is only a screening test and is not definitive. Results cannot be used for medico-legal purposes.

This assay detects amphetamine and methamphetamine and has some cross reactivity with MDA (methylenedioxyamphetamine) and MDMA (methylenedioxymethamphetamine; ecstasy).

Click here for List of Cross Reactive Substances

False positive results may occur due to other cross reacting substances, however, positive results are NOT routinely confirmed by a second method. If confirmation of the test result is required, it is the responsibility of the physician to separately order a specific confirmatory test for the drug identified. Contact laboratory at x 31667 to request confirmatory testing. Confirmation test code AMPQNT. Samples are held for 7 days. False negative results are also possible, for example, with use of newer designer amine compounds.

Amphetamine can be detected in urine from 24 hours up to 9 days after use. Methamphetamine can typically be detected 1.5-6 days after use. (From: Verstraete AG. Detection Times of Drugs of Abuse in Blood, Urine and Oral Fluid. Ther Drug Monit, 26(2) April 2004, 200-205).
CPT coding 80301
LOINC code 19343-3
Last Updated 1/18/2018 10:18:39 AM
Entry Number 54
Lab Procedure Link Click here for Procedure
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