ELI5- Why can’t an individual remain constantly in a state of euphoria or high? Why does everything eventually return to normal?

Question

I just had this random thought while lying on my roof, listening to “Young Dumb & Broke,” and being in that same state.

In: Other

Answer 1

From a chemical perspective, you get that euphoria from the CHANGE in neurotransmitters, not the absolute amount of them. So going from low-high is what does it, not the absolute amount being high. High levels of neurotransmitters just cause mania and psychosis after a while. They need to return to a baseline so you don’t go stark raving mad.