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Drug Screening

2C-B testing: which drug tests do and do not look for 2C-B

According to the Trimbos Institute, the trip drug 2C-B causes physical effects such as dilated pupils, dizziness and a slight rise in heart rate, and is often sold as a pill. According to the Trimbos Institute, the effects of 2C-B start 20 to 40 minutes after taking it and are strongly felt for about 4 to 6 hours, after which a user is not yet sober.

According to the Trimbos Institute, 2C-B can give a bad trip, in which someone is overwhelmed by the experience, with fear and confusion, and in people who are susceptible to it may trigger or worsen a psychosis. According to the Trimbos Institute, almost no self-tests look for 2C-B, while a urine or blood test in a laboratory can probably find 2C-B.

Star-SHL, Unilabs, Certe and Diagnostiek voor U publish no reference value or unit for 2C-B, and Unilabs names 2-CB among the substances in its urine screen for new psychoactive substances, using the LC-HR-MS method.

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According to the Trimbos Institute, 2C-B is a trip drug on list 1 of the Opium Act. According to the Trimbos Institute, a laboratory can probably find 2C-B in blood or urine.

  • Star-SHL, Unilabs, Certe and Diagnostiek voor U publish no reference value or unit for 2C-B.
  • According to the Trimbos Institute, it is not clear how long 2C-B can be detected after use.
  • According to the NVKC, a positive drug test result, including one for 2C-B, must be confirmed with another analytical method.

2C-B: what this test measures

A 2C-B determination looks for 2C-B in a body sample; Certe names 2-CB as one of the components of its qualitative drug screen of more than 200 components, in blood or in urine.

2C-B: why this value matters

According to the Trimbos Institute, 2C-B is a new psychoactive substance (NPS) on which very little research has been done, and according to the Trimbos Institute some unpleasant effects may not be known yet. According to the Trimbos Institute, someone who has taken 2C-B cannot yet drive a car safely after 4 to 6 hours.

2C-B: how the blood test works

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2C-B: when is testing worthwhile?

According to the NVKC, a drug test such as a 2C-B test can be requested, among other things, in clinical care when drug use is suspected, in workplace testing and in testing athletes. According to the Trimbos Institute, there are almost no self-tests for 2C-B, while a urine test in a laboratory can probably find 2C-B.

2C-B: symptoms of a high or low value

Low Levels

A result without 2C-B does not rule out earlier use, because according to the Trimbos Institute it is not clear how long someone tests positive for 2C-B after use. According to the NVKC, urine collected within 1 hour of drug use may not show anything yet.

High Levels

According to the NVKC, a positive result for 2C-B must be confirmed with another analytical method, because a positive drug test result can have far-reaching consequences. Unilabs and Certe name 2-CB in screens that also look for other designer drugs, such as 3-MMC and 4-MMC.

2C-B: causes of a low or high value

What lowers the value

  • Tested too soon after use

    When urine is collected within 1 hour of drug use, it can happen that nothing can be detected yet.

  • A test that does not look for 2C-B

    Many self-tests and the police saliva test do not look for 2C-B.

What raises the value

  • Use of 2C-B

    Someone who used 2C-B could get a positive drug test; a laboratory can probably find 2C-B in blood or urine.

2C-B: lifestyle and this value

You can take a 2C-B result to your GP, and for symptoms after use or worries about use the Trimbos Institute refers to the Drugs Infolijn, which can be reached anonymously.

2C-B: frequently asked questions

Do the police test for 2C-B?

According to the Trimbos Institute, the saliva test the police use does not test for 2C-B, but someone the officer thinks is under the influence has to come to the station for a blood test, and that blood test can find 2C-B.

2C-B: sources

  1. NVKC, Alles over testen: Drugstest, allesovertesten.nl, geraadpleegd 2026-10-19 (retrieved 2026) allesovertesten.nl
  2. Trimbos-instituut, DRUGSinfo: 2C-B: aantoonbaarheid, drugsinfo.nl, geraadpleegd 2026-10-14 (retrieved 2026) drugsinfo.nl

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These panels measure values from the same category as this marker.

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2C-B

€146,-