Hey @zebra1
I wanted to take a moment to welcome you to the forums. I am so glad that you felt safe enough to reach out here 💚
It really sounds like you're navigating an incredibly difficult balancing act right now. On one hand, you're seeing your brother feel more like "himself", talkative and energetic, after struggling with that heavy emotional blunting that can come with antipsychotics. On the other hand, you're carrying the weight of "waiting for the other shoe to drop" regarding a potential manic state or rebound psychosis.
That feeling of not wanting to "dob" or betray his trust is very common amongst family members; it's something I can resonate with, having been a carer previously for my sister with complex mental health conditions, and a carer currently for my partner, who lives with Schizophrenia. It is really hard when the system can sometimes feel like it only offers two speeds: total compliance or forced treatment.
It is worth acknowledging that the "blunted" feeling he experienced is a very valid reason for why many people want to cease medication. It can feel like losing your personality/identity. Recognising that might help when you talk to him, letting him know you see why he wanted a change. Although I will say that the initial burst of energy after stopping medication is a "rebound" effect. It can look like a positive mood boost, but, as you've noticed, it can escalate quickly.
Instead of going straight to the psychiatrist, have you had a chance to chat with your brother about what he wants his life to look like? Sometimes, framing it as something like "I love seeing you with more energy, but I'm a little scared of how fast things are moving. How can we make sure you stay feeling good without hitting a crisis?" can open a door to a shared plan.
I know here on SANE there are helpful fact sheets/information for families, friends and carers of those living with Schizophrenia that might be of interest to you. There is one here specifically on Schizophrenia and one for Families, friends and carers
Please remember to look after yourself! Holding this level of worry for a sibling is extremely challenging and draining. We're all here for you if you need to vent or think through the next steps 💚