Are take home drug tests accurate?

Many First Check® Home Drug testing products are more than 99 percent accurate in detecting specific drugs according to the designated cut-off levels. However, if a more sensitive test is administered, there is a chance of testing positive if drugs are present in urine.

Are instant drug tests accurate?

While highly accurate, rapid testing is not 100% fool-proof. There is no current lab test that is 100% fool-proof. Rapid drug tests cannot determine quantity or duration of substance abuse. Federal agencies, such as the DOT will not accept rapid testing results.

What is the most accurate way of drug testing?

Blood testing is expensive and invasive, but is the most reliable for determining if the individual is under the influence of drugs or alcohol right now. Hair testing has the longest detection window, nearly 90 days, and is the least invasive method of all, but also has the highest cost.

What causes an invalid home drug test?

Invalid: An invalid result means that the test was not able to identify whether drugs were present in the sample. Invalid results may be reported for many reasons including evidence of tampering or adulteration that occurred during the collection process.

Can at home drug tests give false negatives?

Test results may be false negatives. Teens also may try to “cheat” on a urine test. They might dilute their urine samples with tap or toilet water, or drink a lot of water before the test to flush drugs from their systems.

What the difference between a lab drug test and a home drug test?

A typical Immunoassay test. In the home drug test the reagent uses a control and detection line as a signal. In a lab performed immunoassay the signal can be a number of things. The most common is linking a chemical that changes color when the reaction takes place.

Are drug tests 100 percent accurate?

Drug testing is not 100 percent accurate. Accuracy depends on a number of factors, such as the type of test, the substance being tested for, the presence of legally prescribed medications in the body, and the length of time that has passed since last use.

What does a very faint line on a home drug test mean?

negative results
Yes, faint lines do indicate negative results. The presence of a test line, regardless of how light, indicates a negative result.