system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: I keep reading all these recreational drugs increase dopamine - the 'feel good' drug in the brain. So why is just injecting dopamine itself not a thing?
gpt
Dopamine cannot cross the blood/brain barrier. Injecting it into your bloodstream wouldn't work. Injecting it directly into your brain would create all sorts of other problems. Starting with the fact that you just stuck a NEEDLE into your BRAIN.