Addiction significantly affects cognitive functions, leading to neuropsychological impairments such as memory loss, attention deficits, and impaired decision-making. Chronic substance use damages brain regions like the prefrontal cortex and hippocampus, essential for executive functioning and learning. These impairments exacerbate addiction cycles by reducing impulse control and problem-solving skills. Neuropsychological assessments help identify these deficits, guiding tailored interventions. Cognitive rehabilitation programs, combined with therapies like CBT and mindfulness, can restore cognitive function and improve treatment outcomes. Addressing these impairments is critical for sustained recovery and reintegration into daily life.