Reflections on Psychiatry & Psychology

Drugs disrupt brain homeostasis by hijacking the dopamine reward system, producing intense pleasure that outweighs natural rewards. Repeated use rewires brain circuits, weakens self-control, and creates cravings, withdrawal, and relapse. Though genetics and environment influence risk, top-down control allows change and recovery.

Drugs disrupt brain homeostasis by hijacking the dopamine-based reward system, producing powerful reinforcement and cravings. Repeated use causes brain adaptations, impaired impulse control, and stress-driven relapse. Genetics and environment increase risk, but recovery is possible through strengthened top-down control.

Decision-making uses limited mental energy (“decision fatigue”). As energy declines, resisting habitual substance use becomes harder. Recovery improves when people conserve mental energy by building routines, reducing temptations, planning ahead, and supporting decision capacity.