Patients with severe obesity frequently exhibit elevated cardiovascular risk. Contributing factors could be inadequate recognition and subsequent management of cardiovascular risk factors, and non-adherence to cardiovascular therapy. This prospective longitudinal cohort study aims to systematically assess the management of major cardiovascular risk factors and objectively evaluate adherence to antihypertensive therapy in patients with severe obesity undergoing evaluation for bariatric surgery. Using repeated assessments and direct plasma drug detection, the study seeks to characterise adherence patterns over time and identify clinical factors associated with persistent non-adherence.