Substance use disorders (SUD) typically manifest through a combination of physical, behavioral, and psychological symptoms.
: Most drugs flood the brain's reward circuit with dopamine, creating euphoria. drug and alcohol abuse
Drug addiction (substance use disorder) - Symptoms and causes Substance use disorders (SUD) typically manifest through a
: 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. drug and alcohol abuse