It has been over a week and I would give out another update about my brother's conditions.
He has been visiting psychiatric for a medication that contains heavily on serotonin for his sleep talk. Good news that he no longer talks during his deep sleep, however he's sleeping more than 10 hours. He always feel very sleepy sometimes during the day in afternoon. He's eating meat every day, mainly beef for his iron, and currently he weight 48KG
3 days ago something strike his mind, maybe it's the side effect from the pill. He cannot sleep the whole night and he was really active. He was having a strange effect that he cannot take his focus away from an object, even little objects were disturbing him. Whenever he tried to close his eyes, his eyes always wanted to open and it keeps on blinking up wanting to focus something. He tried to explain to me when he looks at the specific object, he can see a shadow, something around the object, some light reflection and some colour pixels. It was really disturbing him and that he cannot look away.
After taking a nap by force, he was recovered by 50%