[amelius]

How does serotonin in a pill reach the brain then? :)

Is there some special delivery mechanism behind it?

[kayodelycaon]

There is no serotonin in pills. SSRI stands for selective serotonin reuptake inhibitor. It is a chemical that modifies how certain cells reabsorb serotonin.

https://en.wikipedia.org/wiki/Selective_serotonin_reuptake_i...