The scarey thing about a lot of mental health medication is that the manufacturers themselves can only guess at WHY it works.

I can remember when I was studying psychology at uni I was reading up on an antipschotic drug (I dont recall which one now) and the manufactures information about the drug had a line that started "How we think the drug works is....."

I was gobsmacked that these drugs were being adminstered left right and chelsea and without anyone actually knowing HOW they worked, they just know from lots of testing that they do work to a certain extent, but not truely understand how, doesnt exactly fill you with confidence

Sadly we have only scratched the surface so far with our understanding of how the brain itself really works, so we are a long way off proper cures for mental health issues.