: Most drugs flood the brain's reward circuit with dopamine, creating euphoria.
: Long-term use disrupts brain circuits responsible for judgment, decision-making, and stress, making it difficult for individuals to stop even when they want to. Identifying the Warning Signs drug and alcohol abuse
Substance use disorders (SUD) typically manifest through a combination of physical, behavioral, and psychological symptoms. : Most drugs flood the brain's reward circuit
: Over time, the brain reduces its natural dopamine production, leading to tolerance —the need for higher amounts of a substance to achieve the same effect. and psychological symptoms. : Over time
Drug addiction (substance use disorder) - Symptoms and causes