I'm not really sure of any specific 'Harry Potter' fanfictions about drugs. The 'Harry Potter' world is mainly about magic, friendship, and good vs. evil. Fanfictions usually focus on expanding on those themes, like exploring new relationships between characters or creating different magical adventures. The idea of drugs doesn't really fit into the typical 'Harry Potter' fanfiction landscape.
Well, it's important to note that in the official 'Harry Potter' universe, drugs are not a part of the story. However, in some fanfictions, they might use the concept metaphorically. For example, there could be a fanfic where a dark magic spell has an effect similar to a drug on the characters, making them lose control or see things differently. But this is a very rare and often not well - received type of fanfiction as it goes against the positive and magical essence of the original series.
Most 'Harry Potter' fanfictions that I've come across are centered around the characters' growth, their studies at Hogwarts, and battles against the dark forces. The topic of drugs is not common at all. It might be that such fanfictions exist in some very niche corners of the internet, but they are not mainstream. If there were any, they might be using the drug concept to symbolize something negative like the corrupting influence of dark magic on a character's mind.
In some Harry Potter fanfiction, there might be concepts related to potions that could be misconstrued as 'drugs' in a very loose sense. For example, the Felix Felicis potion which gives the drinker good luck. However, the original series doesn't really have drugs in the traditional sense. Fanfiction writers may play with the idea of the misuse or abuse of potions in their stories, but this is not in line with the positive values of the original work.
There could be a fanfiction where Harry and his friends discover an ancient water sport in the Forbidden Forest that has been long forgotten. They then try to revive it with the help of their magical skills and knowledge. This could involve exploring the magical properties of the water in the forest and how it affects the sport.
Well, there could be a fanfiction where the Forbidden Forest is filled with enchanted flowers that can talk. These flowers might give clues to Harry and his friends about hidden secrets in the forest or about Voldemort's next move. Or perhaps a story where a student creates a new breed of flower using magic, and this flower becomes a symbol of hope during the dark times at Hogwarts.
One interesting autism - related Harry Potter fanfiction could be about an autistic character attending Hogwarts and how they navigate the magical world with their unique perspective. For example, they might have special ways of interacting with magic that others don't understand at first.
There might be a fanfiction where Mithril is discovered in the Forbidden Forest. In this story, the discovery of Mithril could lead to a new kind of magic being explored at Hogwarts. The characters might study its properties and find out that it has a connection to an ancient magic that was long forgotten. For example, it could be linked to the magic of the founders of Hogwarts, and its presence could start to change the balance of power within the school.
A fanfiction could involve the cupboard being a time - travel device. Harry accidentally activates it and is sent back in time to when his parents were at Hogwarts. He gets to see them in their youth, and through his interactions, he changes some small events that have a big impact on his present life.
A fanfiction might revolve around Draco Malfoy getting into trouble for his family's actions in the wizarding world. Maybe he has to face the wrath of other students or the Hogwarts staff because of his father's allegiance to Voldemort. This could lead to a story of Draco trying to redeem himself or find a way to clear his family's name.
One interesting 'Harry Potter has a Persona' fanfiction could be one where Harry discovers a magical Persona within himself that helps him face Voldemort in a different way. Maybe it gives him new powers or a different perspective on the battle.
There could be a fanfiction where a dark wizard uses a poisoned object to try and assassinate Harry Potter. The poison could be something very rare and difficult to cure, leading to a race against time for Hermione and Ron to find an antidote. They might have to search through ancient books in the restricted section of the library or seek help from magical creatures who are known for their knowledge of antidotes.
One interesting 'Harry Potter' water - related fanfiction could be about a magical underwater adventure in the Black Lake at Hogwarts. Maybe the characters discover a hidden underwater city filled with lost magic and strange creatures.