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All information on THC

At a glance

In transport, the detection of cannabis plays an important role. Here, the active substance delta-9-tetrahydrocannabinol (THC for short) is tested in a rapid test. Rapid tests are carried out by police officers with sweat or saliva samples.

If the rapid test is positive, a drug test is ordered in the laboratory.

THC is broken down within about 8 hours via the intestines, kidneys and breathing.

Further information

The urine test for THC-carboxylic acid (THC-COOH), a metabolite or metabolite of THC, is the most commonly used procedure.

In the urine, the metabolites can be detected for up to several weeks if the consumption takes place regularly.

  • The single smoking of cannabis can lead to a positive detection after 24 to 36 hours.
  • Repeated intake leads to a detection period of five to seven days.
  • chronic abuse can be detected for several weeks.

The reason for this is the good fat solubility. THC is easily deposited in fat-rich tissue and is only slowly degraded there. The feeling of intoxication may have long since disappeared, while the degradation products of THC can still be detected in the urine test for a long time.


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  • Neubauer, S. (2019): Urine test: What can be detected in urine by test strips, URL:
Status of information: 2022