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[Lulu_Jane]

Prozac is an old, old drug Havell, circa 1950's - considering how little "we" knew about the way the brain and the ways that mental illness manifest back then compared to now is like comparing black and white. Prozac is being perscibed less and less nowadays, as there are much more effective and safe (i.e. no chance of overdose, sleepiness, side effects) S.R.I's these days.

Bear in mind that these days we use Valium (diazepam) as a low grade sleeping tablet, but in the heyday of prozac (1950's-60's) Valium was perscribed for depression. It's pretty easy to imagine that although Valium may be useful for anxiety, it's pretty negative for "black" depresion.

That said and done, just exactly how our brain works and why certain mental illness manifests is still very much uncharted territory for scientists today.