Drug Driving Testing in Europe: France, Switzerland, Belgium, Germany, and the Netherlands
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The same risk, different procedures depending on the country
France, Switzerland, Belgium, Germany, and the Netherlands penalize driving after drug use, but controls, biological matrices, and legal thresholds are not uniform. Cross-border drivers must never apply one country’s rules to another.
Three stages to distinguish
Field screening
It guides the procedure. Depending on the country, law enforcement may use saliva, observe signs of impairment, or directly order a sample.
Confirmation analysis
It is based on a laboratory method. Saliva or blood may be used depending on the national system and circumstances.
Legal threshold
The threshold may correspond to a prohibited presence, a defined concentration, or an assessment of incapacity to drive.
Sanctions
Fines, license withdrawal or suspension, driving bans, and criminal prosecutions vary significantly from one country to another.
France: saliva, confirmation, and enhanced sanctions
In France, roadside drug testing commonly relies on a saliva test. If the test is positive, a sample is analyzed by a laboratory or an accredited expert. The driver must be informed of the right to request a counter-expertise, which requires a blood sample taken at the time specified by the procedure.
Since July 2025, Article L.235-1 of the Highway Code provides for up to three years imprisonment and a €9,000 fine for driving after drug use. The offense also results in the loss of half the maximum number of license points, i.e., six points for a twelve-point license.
Switzerland, Belgium, Germany, and the Netherlands: key differences
Switzerland
The procedure may start with observations or a quick test, but blood analysis plays a central role. Swiss rules must be verified with local authorities before any travel.
Belgium
Saliva is used in roadside checks, with subsequent analysis and, in some situations, a blood sample. The thresholds and consequences are not the same as in France.
Germany
The framework has evolved after the partial legalization of cannabis. This evolution does not authorize driving after consumption: specific rules remain, especially for young drivers and novice drivers.
Netherlands
The tolerance policy regarding certain uses does not remove the prohibition of driving under the influence of drugs. Controls and analyses are planned when consumption is suspected.
Saliva, blood, and urine do not serve the same purpose
Saliva is particularly suitable for detecting recent use. Blood can be used to measure a concentration according to national rules. Urine often has a longer detection window and alone does not assess immediate fitness to drive. A private self-test does not replace official control or laboratory analysis.
Before an international trip
- Check the rules of the country of circulation and not just those of the country of registration.
- Never combine alcohol, cannabis, sedative medications, or other substances before driving.
- Consult the medication leaflet and ask a healthcare professional for advice if in doubt.
- Plan a non-driving return solution when you consume.
Prevent before taking the road
AMA Prévention offers Drugdiag® saliva and urine tests intended for prevention and self-monitoring. A negative result never constitutes legal authorization to drive.
Frequently asked questions
Are road tests the same everywhere in Europe?
No. The devices, biological matrices, thresholds, and sanctions depend on national law.
Does legal or tolerated cannabis allow driving?
No. The legislation on consumption and that on driving are distinct.
Does a negative self-test allow driving?
No. It is only a prevention tool, which does not replace official control and does not guarantee the absence of risk.
Reference sources
Légifrance — article L.235-1 of the Highway Code
Service-Public.fr — Drug driving
For Switzerland, Belgium, Germany, and the Netherlands, consult the official portals of road and police authorities before any travel. Informative article, without individualized legal advice value.
