how far back can a saliva drug test go
A saliva drug test, also known as an oral fluid test, can detect the presence of certain substances in a person’s system for a relatively short period of time compared to other types of tests, such as urine or hair tests.
The detection window for a saliva drug test varies depending on several factors, including:
1. Type of substance: Different substances have different detection windows in saliva.
2. Amount of substance used: The more substance used, the longer it can be detected in saliva.
3. Frequency of use: Frequent users may have longer detection windows than occasional users.
4. Sensitivity of the test: The sensitivity of the test can affect the detection window.
Here are some general guidelines for the detection windows of common substances in saliva:
* Marijuana (THC): 1-24 hours (occasional use), up to 72 hours (frequent use)
* Cocaine: 1-4 days
* Opiates (e.g., heroin, morphine): 1-4 days
* Amphetamines (e.g., methamphetamine): 1-4 days
* Benzodiazepines (e.g., Xanax, Valium): 1-4 days
* Barbiturates: 1-4 days
* PCP (phencyclidine): 1-4 days
* Methadone: 1-4 days
Keep in mind that these are general estimates, and the actual detection window may vary depending on individual factors. It’s also important to note that saliva tests can detect substances that have been used recently, but may not detect substances that were used several days or weeks ago.
It’s worth noting that some saliva tests can detect substances for longer periods of time, such as:
* Extended-window tests: These tests can detect substances for up to 7-10 days.
* Confirmatory tests: These tests can detect substances for up to 30 days or more.
However, these tests are typically more expensive and may require a laboratory analysis.
