Beautiful Boy
This movie is a very intense and explicit explanation of an addiction. Personally, I really liked this movie, I even cried while watching it and I understood even better what drug addiction means in particular.
I also liked the fact that it didn't just show it from the perspective of the boy who is struggling with addictions, but it also showed the perspective of the parent who is very sad and difficult at the same time and the perspective of the younger siblings who didn't understand why they couldn't talk to their older brother, which for me, as the older sister, hurt me a lot.
When I have children, I will show them this film so they can better understand addictions and think twice before trying something that could become addictive.