Beschreibung
The THC urine test is a rapid urine test for detecting cannabis metabolites. It detects the relevant metabolite THC-COOH in urine and is intended for an orientative assessment within the framework of screening. The result is usually readable after 3–5 minutes.
- Qualitative detection of cannabis metabolites (THC-COOH) in urine
- Result in approx. 3–5 minutes (read no later than 10 minutes)
- 2 test strips per pack – shipping from Switzerland
- Depending on the variant: cut-off at 20, 25, 50 or 150 ng/ml
How to use the THC urine test – step by step
- Collect a urine sample in a clean container.
- Dip the test strip up to the marking (do not exceed) into the urine sample for approx. 10–15 seconds.
- Remove the strip and place it flat on a clean, dry surface.
- Read the result after 3–5 minutes.
Result interpretation
Negative:
Two lines visible (C + T) → no indication of THC-COOH above the selected cut-off value.
Even a faint test line (T) is considered negative.
Positive:
Only the control line (C) visible → possible presence of THC metabolites above the respective cut-off value.
Invalid:
No control line (C) visible → test invalid, repeat with a new test strip.
Frequently asked questions about the THC urine test (FAQ)
How long can a THC urine test remain positive?
After single or occasional use, a few days are common; with regular or heavy use, several weeks are possible.
Detailed guidance can be found here: THC detectability.
What does a very faint second line mean?
provided the control line (C) is clearly visible. Line intensity is not suitable for estimating substance concentration.
Can passive exposure cause a positive result?
traces may theoretically occur, but this is rare in practice. For relevant matters, laboratory confirmation is essential.
Which cut-off value should I choose (20, 25, 50 or 150 ng/ml)?
50 ng/ml corresponds to the internationally established screening standard.
150 ng/ml is more selective and may remain negative at lower concentrations.
See also the section Cut-off comparison.
Is the THC rapid test suitable for legal or medical decisions?
a confirmatory analysis in a qualified laboratory is required.
What does “THC-COOH” mean and why is it measured in urine?
This metabolite is formed during cannabis metabolism and excreted in urine. Because THC-COOH may remain in the body longer,
it is particularly relevant for screening tests.
Can CBD, hemp oil or “legal” cannabis products affect the test?
may contain trace amounts of THC (e.g. certain full-spectrum products). With sensitive cut-offs this may be relevant.
If in doubt, a laboratory confirmation is recommended.
What can influence or falsify a result?
strongly diluted urine (e.g. due to excessive fluid intake) or improper storage. Important: read the result within 10 minutes,
as later changes are no longer reliably interpretable.
Why must the result be read within 10 minutes?
After this period, non-specific effects (e.g. background discoloration) may occur and affect readability.
Therefore: read within the specified time (typically 3–5 minutes, no later than 10 minutes).
What should I do if the result is positive?
If there are relevant consequences (medical/work/traffic/legal), a confirmatory laboratory analysis should be performed.
A single screening result is not intended for legally binding decisions.
Product technical details
| Test type | Urine test strip (qualitative screening test) |
| Target analyte | THC-COOH (main metabolite of cannabis) |
| Cut-off value | Depending on the variant: 20, 25, 50 or 150 ng/ml |
| Result time | Approx. 3–5 minutes (read no later than 10 minutes) |
| Package contents | 2 test strips & instructions |
| Storage | Store in a dry place at room temperature according to the package insert |
Screening for orientation
Discreet shipping from Switzerland
Understanding the cut-off: 20 / 25 / 50 / 150 ng/ml – which THC test is suitable?
The cut-off is the defined threshold at which a screening test is interpreted as “positive”.
A lower cut-off is more sensitive (reacts to lower concentrations), while a higher cut-off is more selective.
| Variant | Interpretation (orientative) | Typical choice |
|---|---|---|
| 20 ng/ml | Highly sensitive – may detect lower concentrations | If maximum sensitivity is desired |
| 25 ng/ml | Sensitive – often detects low concentrations | Popular for sensitive screening (possible residual traces) |
| 50 ng/ml | Internationally established screening standard | Standard choice for general screening |
| 150 ng/ml | More selective – less sensitive reaction | If focus is on higher concentrations |
Actual detectability also depends significantly on consumption patterns and individual factors.
THC detectability in urine (indicative values)
THC is metabolized in the body into various compounds. For urine rapid tests, THC-COOH is particularly relevant,
as it is often detectable longer than THC itself. The detection window depends on frequency of use, cut-off
and individual factors (metabolism, body composition).
| Frequency of use | Typical detectability in urine* |
|---|---|
| Single use | often approx. 1–3 days |
| Occasional use | up to about 1 week |
| Regular / heavy use | several weeks possible |
*Indicative values may vary individually and also depend on the selected cut-off. For a detailed overview see:
THC detectability – How long does cannabis remain detectable?
Screening test vs. confirmatory analysis
Important: This THC urine test is a screening test for orientative assessment.
For medical, employment-related or traffic-law questions, a confirmatory analysis in a qualified laboratory is required.
Technical background & sources
The content is based on publicly available scientific sources and the respective manufacturer IFU (instructions for use).
It serves for contextual understanding (screening, metabolites, detection windows) and does not replace individual professional advice.
- EMCDDA – Drug profile: Cannabis (effects, metabolism, classification)
- Huestis MA — Pharmacokinetics of cannabis and cannabinoids (metabolism and detection in the body)
- Verstraete AG — Detection times of drugs in blood, urine and oral fluid
- FOPH – Federal Office of Public Health (Swiss context, prevention, information)
- FEDRO – Federal Roads Office (traffic law / procedures / context)
- Manufacturer IFU (instructions for use) of the respective test variant (cut-off, procedure, reading time).
Important notice:
This THC urine test is intended for orientative screening purposes only. It does not replace medical, therapeutic or legally binding assessment.
For confirmatory results, analysis in a qualified laboratory is required.
Content reviewed and updated on: 10.02.2026 – Toxcontrol Diagnostics
