Thanks for choosing health care magic for posting your query.
Rajani, Your brother appears to have serious mental illness. Since it is 11 years,you surely might have shown it to many psychiatrists. From the description that you have given it appears that he might be having schizophrenia- but it will be too early to make a diagnosis and we need to talk to him first to confirm the diagnosis.
There are many newer drugs in the market which cure this illness with out causing sedation. Viz Aripiprazole
, Amisulpiride etc. You can ask your doctor to prescribe you those. You should try changing your psychiatrist if you are not convinced by the treatment.
Hope I have answered your query. I will be more than happy to help you if you need any further clarifications.
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Wish you a good health!