🧪 Drugtest-info – test types, detection times and result interpretation
Drugtest-info provides a clear and reliable overview of drug testing. On this page you will find practical information about how drug tests work, the differences between sample types, how long substances can be detected, and how test results should be interpreted correctly.
Modern rapid drug tests are an easy and reliable way to determine whether drug residues are present in a sample. Rapid tests are screening tests: they indicate possible substance presence but do not determine the exact time of use, dosage, or level of impairment. If necessary, a positive result can be confirmed through laboratory analysis.
Detection times are influenced by the test method, the substance used, frequency of use, individual metabolism, sample quality, and possible attempts to manipulate the sample.
This drugtest-info is intended as a clear guide for those who want to understand how drug tests work and how results should be interpreted.
💧 Urine test
Urine testing is the most commonly used method for drug screening. It detects metabolites that can remain in urine for several days, and for some substances even weeks.
Fast-clearing substances include cocaine and amphetamines, while cannabis and opiates tend to remain detectable for longer. Urine test results may be affected by dilution or additives, which is why supervised sample collection provides the highest reliability.
👄 Saliva test
Saliva testing is well suited for detecting recent drug use. It is fast, easy to supervise, and commonly used in roadside testing.
The detection window for saliva tests is usually from a few hours up to one day, and manipulation is more difficult than with urine samples.
💇♂️ Hair test
Hair testing indicates drug use over a longer period, typically up to three months. It does not react to single-use occasions but provides an overview of long-term usage patterns.
Hair bleaching and strong chemical treatments may reduce test reliability.
🩹 Sweat test
Sweat testing uses a patch and is mainly applied for long-term monitoring. It is sensitive and very difficult to manipulate, but relatively costly and sensitive to environmental factors.
🩸 Blood test
Blood testing reflects the current state of the body and acute drug use. It is performed in a laboratory and is the most accurate method for assessing impairment. Blood tests can identify the substance, its concentration, and the timing of use.
🧂 Powder and surface test
Powder and surface tests detect drug residues from surfaces, textiles, powders, and tablets. These tests are suitable for identifying suspicious substances in homes, workplaces, or educational environments.
Check out the product:
Multi-drug test for powders and brushing samples
🏢 Authorities and workplace testing
👮 Drug testing by authorities
In official use, a positive rapid test result is always confirmed in a laboratory, typically using mass spectrometry. Confirmation is usually performed from the same urine sample, but after a saliva test, a new urine or blood sample may be taken.
🏭 Workplace drug testing
Employers cannot conduct drug testing without employee consent. In recruitment situations, testing may be required if justified by the nature of the job.
In many sectors, drug-free policies are part of occupational safety practices aimed at preventing risks and accidents.
🎓 Children and students
At-home drug testing can be used as an initial assessment and a way to open discussion. In school healthcare, testing requires justified grounds and the young person’s consent. In higher education and vocational institutions, testing may be carried out if drug influence is suspected and functional capacity is impaired.
📊 Interpretation of drug test results
Drugtest-info helps explain what test results mean and why they are not always black and white. Results are based on chemical reactions indicating whether certain substances or their metabolites are present in a sample.
Result types:
✅ Negative – no substances detected above the test cut-off
⚠️ Positive – substance residues detected, not automatically indicating impairment
❌ Invalid – test malfunction or faulty sample
A positive rapid test result should always be confirmed in a laboratory to rule out cross-reactions or other sources of error.
Possible sources of error include medication, supplements, sample dilution, improper storage, failure to follow instructions, and individual metabolic differences.
⏱️ Detection times
Detection times vary depending on the individual and the testing method. The following values are indicative.
| Substance group | Urine | Saliva | Hair |
|---|---|---|---|
| Amphetamines | 1–3 days | 12–24 h | up to 90 days |
| Cannabis | 2–14 days (heavy use up to 30 days) | 12–24 h | up to 90 days |
| Cocaine | 1–3 days | 6–12 h | up to 90 days |
| Opiates | 2–5 days | 12–36 h | up to 90 days |
| Benzodiazepines | 3–7 days | 12–24 h | up to 90 days |
More information about drug testing can be found from independent sources, such as Wikipedia:
https://en.wikipedia.org/wiki/Drug_testing
❓ Frequently asked questions
Can drug tests be done at home?
Yes. Testerit tests are the same type used by professionals and authorities across Europe. Results are typically available within 5–10 minutes.
How reliable are drug tests?
When used correctly, drug tests are highly reliable. Positive results should always be confirmed in a laboratory.
Can medication affect results?
Yes. Certain medications and supplements may cause cross-reactions, which is why confirmation testing is recommended.
Can drug tests be cheated?
Attempts such as sample dilution may affect results, but supervised sampling and quality tests help identify unreliable samples.
Which test should I choose?
Saliva or blood tests are suitable for detecting recent use. Urine and hair tests are better for long-term monitoring.
When should testing be repeated?
If suspicion remains despite a negative result or if the sample was invalid. Changing the sample type may improve reliability.
Where can I find powder and surface tests?
Multi-drug test for powders and brushing samples
