Cannabis and driving: a self-test does not replace caution
Partager
Why is cannabis incompatible with driving?
Cannabis can reduce attention, disrupt perception, slow reactions, and impair decision-making. The effects felt do not always reflect the persistence of the detectable substance.
Feeling “normal” does not mean the risk has disappeared or that a screening will be negative.
What does a THC saliva test detect?
The test detects THC in saliva above a defined threshold. The result depends notably on the dose, frequency of use, administration method, elapsed time, metabolism, sampling, and device used.
How to interpret a self-test?
- verify the expiration date and the integrity of the pouch;
- follow the sampling and reading time;
- check for the presence of the control line;
- consider any positive result as presumptive;
- do not drive if the result is positive, invalid, or difficult to interpret.
A negative test only means that the targeted concentration was not detected above the threshold with this device at that moment. It does not prove the total absence of THC.
Why can the result change?
The concentration in saliva changes over time. A sample taken too early, too late, or under poor conditions can be difficult to interpret. Another device, threshold, or procedure may also produce a different result.
Oral sprays, mouthwashes, foods, or tips shared online do not guarantee a negative result and should not be used to decide whether to drive.
What is the real purpose of the self-test?
It can help raise awareness, demonstrate the possible persistence of THC, and avoid taking risks. In a company, it must be part of a controlled, proportionate protocol that respects confidentiality.
