Thanks for choosing health care magic for posting your query.
You have missed to mention the exact symptoms of your brother. Many times schizophrenia
and schizoaffective disorders are mistakenly diagnosed as anxiety
initially. the only way you can get out of this mess is by taking proper psychiatric treatment and adhering to it for a few years with out missing out the doses.
if you have socio-economic issues, you should visit a government hospital having psychiatry where you can also get the required medications.
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!