If the person took the COVID jabs I would suggest checking out the resources at FLCCC:
https://covid19criticalcare.com/treatment-protocols/
Personally I associate mania (as in manic depression) with mercury poisoning. Mercury is present in multi-dose vials of flu vaccine. I don't know how brain injury such as you describe following an aneurysm is related to mania, however.
Alex Berenson reported on evidence that COVID injections can cause aneurysms in healthy people: https://alexberenson.substack.com/p/update-on-the-grant-wahl-story-one/comments