Bomb319
Bluelighter
The substance you become addicted to essentially changes your brain over time to the point that you crave it and will do whatever you can to get it in a manner that resembles your built-in instinct to seek water when dying of thirst in the desert, or food while in a period of starvation. You still care about incidental issues that hurt others while undergoing your drug-seeking behavior, but these moral misgivings still take a backseat to your compulsive need for a fix, and are mostly strong only after the fact upon reflection. Rather than seeking a pleasurable high, you're mostly running away from a physically and psychologically intolerable future.