Perhaps in the fanfiction, Harry is under the influence of a dark spell that causes him to hallucinate a car accident. This trauma could be so severe that he starts self - medicating with a dangerous magical substance, becoming addicted. Or maybe he's on a mission in the Muggle world, gets into a car accident, and while in the hospital, he's given some strong painkillers that he then becomes addicted to. But it's important to note that this is all very much against the normal Harry Potter narrative and more of a creative and often disturbing exploration.
There might be some out there, but this is a rather dark and uncanonical take on the Harry Potter universe. It goes against the original spirit of the story which is more about magic, friendship, and fighting evil. However, some writers might explore such themes to show a different side of the characters or to create a cautionary tale. You could try searching on some specialized fanfiction websites, but be prepared for content that might be quite different from what you expect from the traditional Harry Potter world.
The 'Harry Potter' series is centered around themes like friendship, courage, and the fight against evil. Drug addiction is a very serious and dark topic that has no place in the magical world of 'Harry Potter'. Such fanfictions can distort the original values of the series and may be disturbing or misleading for fans who expect the same kind of positive and inspiring content as in the books.
There are no good 'Harry Potter' drug addict fanfictions that are worthy of mention. The 'Harry Potter' world is a place for imagination, growth, and the triumph of good over evil. Fanfictions that deviate so much from the positive values of the original work are not something we should be looking for. Instead, we can look for fan - made stories that expand on the relationships between the characters or the history of the wizarding world.
One possible plotline could be about the Weasley family trying to improve their financial situation. Maybe they come up with a new business idea in the wizarding world, like a magical product that becomes a huge success and changes their economic status. Another could be a story about how the Ministry of Magic regulates the financial system in the wizarding world, and there are some characters who try to manipulate or reform it.
Well, one possible plotline could be a story where a character from the wizarding world, perhaps a powerful wizard, takes on a concubine in a parallel world or an alternate version of the wizarding society. The concubine might be from a different magical culture and their relationship could cause political or social unrest within the wizarding community.
One possible plotline could be that the parrot is a magical pet of a new character who enters Hogwarts. This parrot has the ability to detect dark magic, so it helps the students in their fight against the forces of Voldemort.
One possible plotline could be Harry being secretly trained by an unknown figure to become an assassin against the dark forces. He would have to hide this new identity from his friends at Hogwarts.
A plotline could involve an Eldrazi being brought to Hogwarts by a dark wizard who wants to use its power for evil. The students then have to work together to contain it. Along the way, they learn about the Eldrazi's nature and find that it's not entirely what they expected. There could be some interesting character development as they face this new and powerful threat.
One plotline could be Naruto being a transfer student at Hogwarts. He might struggle to adapt to the magic system while also showing off his ninja skills. Another could be Naruto teaming up with Harry Potter to fight a common enemy that threatens both the ninja world and the wizarding world.
One possible plotline could be that Harry, after some dark magic influence or a strange accident, starts to show Joker - like behavior at Hogwarts. He might play cruel pranks on his classmates and teachers, using his magic in unexpected and unethical ways.