减重药用药越来越便利 专家提醒：别把处方药当“美容药”

Core Viewpoint - The oral version of semaglutide, a "star drug" for weight loss, has been approved by the U.S. FDA, following the approval of its injectable form as the world's first GLP-1 class weight loss medication, sparking public interest in convenient weight loss solutions [1] Group 1: Mechanism of Action - GLP-1 (glucagon-like peptide-1) regulates insulin and glucagon secretion based on blood sugar levels, and semaglutide is a similar compound that activates receptors in various cells to promote insulin secretion, suppress glucagon, and delay gastric emptying, thereby reducing appetite [2] - The core mechanism of semaglutide for weight loss is not fat burning but rather activating neural circuits related to satiety in the hypothalamus and brainstem, leading to reduced hunger and delayed feelings of hunger after meals [2] Group 2: Drug Comparison and Usage - The oral and injectable forms of semaglutide share the same active ingredients and mechanisms, with the oral form being more convenient but requiring higher doses due to lower bioavailability [3] - Current weight loss prescription drugs in China primarily consist of GLP-1 class medications, with BMI (Body Mass Index) being a key criterion for usage; individuals with a BMI of 28 or higher, or 24 with obesity-related complications, may be prescribed these medications [4] - Other weight loss medications include orlistat, which is the only over-the-counter option, but it has poor tolerance and more side effects; new generation dual-target and triple-target weight loss drugs are under development [4] Group 3: Risks of Misuse - The convenience of the oral version raises concerns about potential drug misuse, particularly among individuals not meeting the criteria for its use, which could lead to negative health outcomes such as muscle loss, nutritional deficiencies, and increased risks of gallstones and thyroid tumors [5] - Lifestyle interventions remain essential for effective weight management, and the public should not rely solely on medications for rapid weight loss, as there is a risk of rebound weight gain after discontinuation [6]