Cannabis in adolescence: what are the risks and how to talk about it?
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Talking about cannabis with a teenager requires moving away from alarmist or trivializing speeches. The goal is not to label or blame, but to understand the situation, identify signs of difficulty, and open the way to appropriate help.
What do the French data show?
The 2022 EnCLASS survey by OFDT, conducted among 9,566 middle and high school students, indicates a continuous decline in drug use during adolescence. Cannabis experimentation concerned 5.3% of 8th and 9th graders, 16.2% of 10th graders, and 31.2% of 12th graders.
These figures do not mean that all young experimenters become regular users. However, they show that exposure increases significantly in high school and that prevention must start before the first uses.
What effects can appear?
In the short term, cannabis can impair attention, immediate memory, coordination, time perception, and reaction ability. It can also cause anxiety, discomfort, panic, or confusion, especially with products highly dosed in THC.
Early, frequent, or intensive use is associated with a higher risk of cannabis use disorder, academic difficulties, and psychological symptoms. These links are complex: they do not prove that cannabis is always the sole cause of a disorder, but they justify increased vigilance for vulnerable adolescents.
Which signs should raise concern?
- lasting change in behavior, sleep, or mood;
- unusual drop in school performance or absenteeism;
- isolation, loss of interest in usual activities;
- memory, concentration, or motivation difficulties;
- increased spending, repeated lies, or conflicts about use;
- driving a vehicle or operating machinery after use.
A single sign does not prove use. It is the overall pattern, repetition, and impact on daily life that should guide the discussion.
How to start the conversation?
Choose a calm moment, start from observed facts, and ask open-ended questions. Avoid threats, humiliation, or interrogation. A phrase like “I’ve noticed you’re sleeping less and seem worried. Is something going on?” opens dialogue more than an accusation.
It is important to remind clear safety limits: do not drive after using, do not get in a vehicle with an impaired driver, and ask for help without fear of punishment in case of distress.
Prevent without stigmatizing
Effective prevention relies on accurate information, a trusting relationship, and early support. Screening should never replace dialogue or be used as a threat. When considered in a family or educational setting, its limits, consent, and the consequences of the result must be explained beforehand.
