Oral fluid (saliva) drug test

A saliva test, also called an oral fluid test, uses a swab placed in the mouth to collect a sample. The whole collection happens in plain view, which makes it hard to tamper with, and it is quick and comfortable for most people. We offer oral fluid testing on request, in person, by appointment.

A shorter look back than urine

Saliva shows recent use. For many drugs, the window is measured in hours to a few days, compared with days or longer for urine. A 2019 research brief from the AAA Foundation for Traffic Safety summarized studies of how long drugs remain detectable in oral fluid. Median last detection times included:

Source: Arnold et al., AAA Foundation for Traffic Safety, 2019. Individual results vary with dose, frequency of use and the test’s cutoff. The same brief notes that the presence of a drug is not the same as impairment.

Cutoffs are lower in saliva

Drugs appear in saliva at much lower concentrations than in urine, so oral fluid tests use lower cutoffs. Federal workplace rules show the scale. Under the SAMHSA oral fluid guidelines, the initial test cutoff for THC is 4 ng/mL with a 2 ng/mL confirmatory cutoff, and for amphetamines 50 ng/mL with a 25 ng/mL confirmatory cutoff (SAMHSA, Federal Register 2019). Compare that with 50 ng/mL for marijuana on a federal urine screen (SAMHSA, Federal Register 2023). Different tests, different scales.

When saliva testing is a good fit

• When observation matters

  Every step happens in front of the collector, which suits plans where the integrity of the sample is a concern.

• When recent use is the question

  If you need to know about the last day or so, such as before a visit or a return to work, saliva targets that window.

• When urine collection is a barrier

  Some people find urine collection difficult. A swab can be easier, and we can talk through options.

For most ongoing monitoring, a 12 panel urine cup remains the better default, because its longer window catches use between appointments. Many plans use urine as the routine test and saliva when a specific question comes up.

How to prepare

1. Request saliva testing when you book. Oral fluid testing is available on request, so let us know ahead of time.
2. Avoid food, drink and gum for a short time before the test. Anything in the mouth can interfere with collection. We will tell you how long to wait.
3. Bring ID and a medication list. Some prescriptions can appear on a drug screen.
4. Collect the sample in view. The collector places or watches the swab and seals the sample.

Saliva testing happens in person at our office at 12326 Venice Blvd, Monday to Friday, 9 AM to 5 PM, at other Blackburn locations on the Westside outside office hours, or through mobile testing at your home or workplace for an additional fee.

Positive results and confirmation

Like any screen, a positive saliva result is presumptive. When a result will be acted on, we send it to a partner laboratory for confirmation, and we can provide chain of custody documentation when a court, attorney or program requires it. Results go only to the people you authorize in writing.

Saliva does not cover alcohol history

An oral fluid drug test is not a substitute for an alcohol test. If drinking is part of the picture, add an EtG test for recent days or a breath test for right now.

Need more than testing?

Monitoring is the first step, not the last. If a result or a hard week tells you more help is needed, Blackburn can connect you to it.

• Therapy and psychiatry

  Assessment, therapy and psychiatric care at Blackburn Clinical Services.

  Visit Blackburn Clinical Services

• Sober living

  Structured sober living and sober apartments on the Westside through Blackburn Recovery Services.

  Visit Blackburn Recovery Services

• Mentoring

  One-on-one mentoring for accountability and structure, at work, at home and in daily life.

  Visit Blackburn Mentoring

• Scholarship help

  Treatment scholarships for people who need care and cannot cover the cost, through The Blackburn Foundation.

  Visit The Blackburn Foundation

Your monitoring coordinator can make the introduction.