TB - attack. Help us understand this.

Hello doctors, Yesterday night, my brother was lying on bed and going to sleep. But all of sudden, we heard a voice coming from his mouth (there was 3-4 drops of blood also came from his mouth) as if he was trying to say something, he wasn't conscious that time but after 3-4 minutes, he got up and was trying to say so many things but his tongue was faltering, we couldn't understand. After 5-7 min, all things went back to normal. But still we have admitted him to hospital. He is currently suffering from chest TB, diagnosed approx 20 days ago. He is on medication and treatment is going on. Yesterday night, CT scan of brain is also done. We are yet to consult with TB specialist and neurologist. Please help and let us know what can we do to avoid these kind of attacks in future. Luckily we were awake at time.. I am scared what if we were sleeping that time when he got that attack. Please help us understand this.