system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't we treat deseases like depression with happiness hormones like dopamin?
gpt
Because too much dopamine causes psychosis (as seen in people who overdose on levodopa, a dopamine drug used to treat parkinsons). And giving people regular doses of dopamine have no beneficial effect on mood--as you must send the dopamine directly into the pleasure centers of the brain for it to work--and pills can't do that.