The extended amygdala is involved in the negative emotional states associated with drug withdrawal and stress.

Addiction is not just about chasing pleasure; it’s also about avoiding discomfort. The extended amygdala processes stress, anxiety, and irritability that emerge during withdrawal from substances. This brain region becomes more sensitive with continued drug use, which can drive a person to use again just to relieve these unpleasant feelings instead of to get high. This cycle of negative reinforcement is a powerful force that fuels addiction's persistence.