How Far Back Can a Mouth Swab Drug Test Go Back?

Answer

A mouth swab drug test can go back about forty eight to seventy two hours. This type of drug test is often done in doctor's offices. It is a reliable test.
Q&A Related to "How Far Back Can a Mouth Swab Drug Test Go Back..."
A drug test can detect drugs that you took 4 days ago. ChaCha!
http://www.chacha.com/question/how-far-back-will-a...
Not Medical Advice: Traces of drugs will show in the saliva up to 24 hours after use. Saliva tests check for alcohol, phencyclidine drugs, opiates, coc@ine, mariju@na, and methamphetamine
http://www.kgbanswers.com/how-far-back-does-a-mout...
Two days.
http://wiki.answers.com/Q/How_far_back_does_the_mo...
for a regular user, about 30 days.
http://answers.yahoo.com/question/index?qid=201208...
1 Additional Answer
Mouth swab drug tests are considered to be a reliable method of drug detection. It is said that most drugs disappear from saliva between 12 and 24 hours. They can however last up to 72 hours.
Explore this Topic
The max amount of time that a oral swab drug test can detect drugs is seventy-two hours. Some tests go back a month or so depending on the amount of drugs that ...
A drug test using saliva goes back about 12-24 hours. After this amount of time the drugs usually disappear. This type of test is usually only helpful where recent ...
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