Depends on the drug. Usually it's about the same as a urine screen though. Pot- approx. 30 days; Opiates- approx. 3-4 days; Methamphetamine- 4-7 days; Alcohol- 24-72 hours; Cocaine- 7-9 days;...
3 days
Depending on the type of test used. Strip, spectro, gas. The sensitivity and accuracy ot the test will vary greatly. Strip test ( used by probation, parole, and some Methadone clincs) are by...