Drug-driving is France's third cause of road deaths (13 % of fatalities, steadily rising). Since 2016, saliva screening has generalised, with about 500,000 tests run annually by law enforcement. This 2026 guide details controlled substances, criminal sanctions and detection times.
Zero-tolerance rule
Unlike alcohol (0.5 g/L allowed), no threshold is tolerated for drugs in France: mere presence in the body is an offence. Defined by Article L.235-1 of the Road Code, this applies to all substances classified as drugs: cannabis (THC), cocaine, MDMA/ecstasy, amphetamines, heroin, opiates, hallucinogens (LSD, mushrooms), GHB. Prescription drugs containing opioids or benzodiazepines are also detected (driving allowed unless incompatibility flagged by pictogram on box).
Screening: saliva, urine, blood
Three test levels are used. Rapid saliva test (field): 4-6 substances in 5 minutes, visual result (strip). Urine test (police station): more accurate but slow. Blood sample (hospital): mandatory legal confirmation after positive saliva test, done within 24h. Driver must accept all tests; refusal equals positive for criminal purposes.
When is screening mandatory?
Three mandatory situations. Casualty accident: any involved driver, even non-responsible. Serious offence (speed > 40 km/h over limit, priority refusal, dangerous driving). Apparent drug-use signs (dilated pupils, erratic driving, smell). Also, preventive random checks are allowed since the 2022 Macron law, notably during weekend and holiday traffic controls.
Positive-test sanctions
Sanctions are heavy, equivalent to alcohol beyond 0.8 g/L. Fine up to €4,500. Up to 2 years prison. Automatic 6-point deduction. Licence suspension up to 3 years. Licence cancellation (3-year retake ban) on recidivism. Mandatory awareness course. Vehicle impoundment, even confiscation. Cumulative with possession sanctions (law of 30 March 2023: €200 fixed fine for simple use).
Cannabis: most detected
Cannabis is the most detected at checks (70 % of positive tests). Detection is prolonged: THC remains detectable in saliva 4-12 hours after inhalation, blood 24-72 hours, urine 3-30 days by use frequency. An occasional smoker can test positive though not consumed for several days. Legal CBD (<0.3 % THC) doesn't normally trigger positive, but some mislabelled products exceed this - caution with uncertified shops.
Other substances and times
Cocaine: detectable 6-24h saliva, 1-2 days urine. MDMA/ecstasy: 24-48h saliva and blood, 2-3 days urine. Amphetamines (speed): 12-48h saliva, 2-3 days urine. Heroin/opioids: 6-24h saliva, 1-3 days urine. Benzodiazepines (Xanax, Valium off-prescription): 1-3 days saliva, 5-30 days urine by molecule.
Insurance risk after positive test
In a casualty accident with a drug-positive test, the insurer has several remedies. Cover forfeiture: refusal to cover vehicle damage (but third-party compensation mandatory). Subrogation action: insurer pays third parties and sues the driver to recover. Significant premium hike (up to +150 %) or contract cancellation. On recidivism, the driver may be listed in the AGIRA file and struggle to re-insure.
Medications and driving
Some medications are incompatible with driving and must be flagged. Level-1 pictogram (yellow, "Be careful"): no major incompatibility. Level 2 (orange, "Be very careful"): driving discouraged during treatment. Level 3 (red, "Warning, danger, do not drive"): driving prohibited during treatment. Opioids (tramadol, codeine), benzodiazepines (Lexomil, Xanax, Stilnox), some antidepressants (Laroxyl) and anticonvulsants can trigger a positive test.
Courses and points recovery
An awareness course can be imposed or proposed. 2 days (14h), €130-270. 4 points recovered (1 course per 12 months). After drug-related suspension or cancellation, candidate must retake medical exam (fitness), psychotechnical test, and possibly the code or full exam (cancellation > 6 months).
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