Drug Name Urine Detection
Saliva Detection
All detection window timeframes are approximate.
Amphetamine 1-5 days 1-3 days
Barbiturates 1-7 days 1-3 days
Benzodiazepine 1-10 days 1-3 days
Buprenorphine 1-10 days 1-3 days
Cocaine 1-5 days 1-3 days
EDDP 1-3 days 1-3 days
Fentanyl 1-2 days 1-2 days
Hydrocodone 1-6 days 1-2 days
Hydromorphone 1-3 days 1-2 days
K2 Spice 1-3 days 1-2 days
Ketamine 1-3 days 1-2 days
LSD 1-5 days 1-5 days
Marijuana - THC 1-30 days 1-2 days
MDMA - Ecstasy 1-5 days 1-3 days
Methadone 1-12 days 1-7 days
Methamphetamine 1-5 days 1-3 days
Opiates 1-5 days 1-2 days
Oxycodone 1-5 days 1-2 days
Phencyclidine PCP 1-7 days 1-3 days
Propoxyphene PPX 1-10 days 1-5 days
Tricyclic Anti-Depressants 1-7 days 1-5 days

There are too many factors that can affect how long a drug stays detectable and these timeframes are only guidelines for the length of time after using a drug that a particular testing method will indicatte a positive result. The above detection timeframes have been developed by the scientific community to help identify a approximate time frame as to how long the drug stays in the system.

Drug testing normally involves establishing the concentration of a drug above a certain level rather than just detecitng the presence of the drug. A “cut-off” is the lower detectable limit of the amount of a drug present in a specimen.

Cut-offs are set for a number of reasons:

  • Exclude defenses based upon passive inhalation or environmental exposure.
  • Will not detect low dosage use of over-the-counter medications; e.g. Codeine.
  • Standardization of laboratory testing.
  • To ensure that testing is being performed at the same level within an industry; e.g. workplace testing.