Table of Contents
What does ng/mL mean on a drug test?
Nanograms per milliliter, abbreviated ng/mL, is the unit of measure most commonly used to express drug testing cut-off levels and quantitative test results in urine and oral fluid. A nanogram is 10-9 grams.
What are the levels on a drug test?
(2) Each confirmatory drug test must provide a quantitative result….§ 26.163 Cutoff levels for drugs and drug metabolites.
| Drug or metabolites | Cutoff level [nanograms (ng)/mL] |
|---|---|
| Marijuana metabolites | 50 |
| Cocaine metabolites | 300 |
| Opiate metabolites | 2000 |
| Phencyclidine (PCP) | 25 |
What does a positive dilute drug test mean?
First of all, if a test comes back as a positive dilute, that means that the client has drugs in his or her system. It means that while there was more than the usual amount of water in the sample, the presence of drugs was still there.
Can a urine drug test be inconclusive?
Inconclusive/invalid– this means that the test detected no amount of the drugs tested for. With an inconclusive result, your employer may choose to have you retake a drug test.
How much water should you drink before a urinalysis?
Before your test, make sure to drink plenty of water so you can give an adequate urine sample. However, drinking excessive amounts of water may cause inaccurate results. One or two extra glasses of fluid, which can include juice or milk if your diet allows, is all you need the day of the test.
What is the maximum amount of water you should drink a day?
Most people’s kidneys eliminate 20 to 28 liters of water per day, at a maximum of one liter per hour. They claim this is the absolute maximum amount of water you should drink each day, but the best thing to do is just listen to your body and drink when you’re thirsty.
What is cut off level?
What does “Cut-off level” mean? Essentially, it means separating the positives from the negatives. In drug and alcohol testing, a cut-off level is a level at which the concentration of a substance in your breath, urine, or saliva, indicates a safety risk.
What are Samhsa cutoff levels?
Federal or DOT Cutoff Levels
| Initial Test Analyte | Initial test cutoff | Confirmatory test cutoff concentration |
|---|---|---|
| Amphetamine | 500 ng/m | 250 ng/mL |
| Methamphetamine | 500 ng/mL | 250 ng/mL |
| MDMA/MDA | 500 ng/mL | 250 ng/mL |
| Opioids |
Can diluted UA still test positive?
Sometimes dilution is intentional, but it can happen accidentally as well. If the drug levels do not reach a certain cut-off point established by the laboratory, the specimen will not be marked positive for the drug even if it is detected.