A bit of backstory, a good friend of mine at age 24 began to change. They suddenly became very hateful towards their family finding insult in every little thing they did for them. Their family whom I know well are incredibly supportive and caring so I was quite shocked by this. They distanced themselves from every one out of the blue and moved hundreds of miles away cutting us all out of their life. Something very out of character for them. They have worked a career in catering since age 16 but the suddenly decided they were going to go to university to become a doctor which was again out of the blue. I began speaking to them recently and they claimed they were having problems concentrating recently and had developed adhd at age 27. They said they knew they had adhd because they began hearing loud music playing when there was none and someone talking to them all the time telling them what to do. I am concerned they’re developing schizophrenia due to a family history of schizophrenia.