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What do antidepressants do?
Facilitate neurogenesis, decrease the amount of serotonin in the brain. NOTE: Was previously thought that serotonin levels are decreased in depressed patients, but evidence suggests they may be increased. SSRIs, the studies say, actually can make things worse, and if they do work, it is just because they jumped the body's compensatory mechanisms to lower serotonin levels into gear... so, they actually increase serotonin, but also do contribute to neurogenesis