A 58-year-old patient with a body mass index (BMI) of 31.5 kg/m2 has lost 10 lb (4.5 kg) by logging food intake, reducing caloric intake, and walking daily for 30 minutes. The patient's weight loss has reached a plateau.The medical history includes uncontrolled type 2 diabetes, hypertension, and atherosclerotic cardiovascular disease (ASCVD). The patient takes opioids occasionally to manage osteoarthritic pain. Which agent would be the most appropriate choice for this patient?