What is THC?
THC stands for tetrahydrocannabinol and is the most important psychoactive substance in the cannabis plant (also known as marijuana or hashish). This means: THC is the substance that provides the “high” feeling when consuming cannabis – i.e. the change in perception, mood and way of thinking.
How does THC work?
THC acts on the central nervous system, more precisely on so-called cannabinoid receptors in the brain. These receptors are part of the so-called endocannabinoid system, which regulates many bodily functions – e.g. sleep, appetite, pain perception and mood. If THC is ingested, this can lead to the following effects, among others:
- Feeling of relaxation or euphoria
- Changed perception of space and time
- Increased appetite (“ravenous appetite”)
- Concentration and memory disorders
- Anxiety or confusion (especially with higher doses or sensitive people)
Risks for adolescents
Particularly important for parents: The brains of adolescents are still developing – until around the age of 25. Regular use of THC can have negative effects during this time, e.g:
- Impairment of mental performance
- Increased risk of mental illnesses such as depression or psychosis
- Stronger dependency tendencies compared to adults
Legal framework (Germany, as of 2025)
Since April 2024, the possession and consumption of small amounts of cannabis has been permitted for adults under certain conditions. Consumption remains prohibited for young people. Sale to minors is punishable by law.
What should parents know and do?
- Open conversations: show interest without judging. Ask questions like: “Have you ever heard of it?” or “What do you think about cannabis?”
- Facts instead of bans: Factual information helps more than mere warnings.
- Be a role model: Children are strongly influenced by their own use of alcohol, nicotine or cannabis.
- Get help: If you are worried about your own offspring, there are many counseling centers – anonymous and free of charge (e.g. the drug counseling services of Caritas or Drugcom.de).
Abstract:
THC is the psychoactive ingredient in cannabis. Its use can entail long-term risks for young people – especially for the developing brain. Parents can make a decisive contribution through education, discussions and support.