Doped Up

Your lights are on
But you're not home
Your mind
Is not your own
--Robert Palmer

Dopamine is a neurotransmitter that plays many roles in the human body. A primary role is as a chemical messenger that signals pleasure to brain for predicted rewards. The 'high' feeling associated with dopamine release is thought to be an important factor in addictive behavior.

I've long felt that people who can't put down their devices because they must stay plugged into their social networks exhibit signs of addiction.

Perhaps they're doped up on dopamine.