A weight loss drug is a medication formulated to aid in the reduction of body weight, typically prescribed for individuals with obesity or weight-related health conditions. These drugs work through various mechanisms, such as appetite suppression, increased energy expenditure, or reduced fat absorption. They are often used alongside diet and exercise and may be approved for long-term or short-term use depending on safety and efficacy profiles. The market for weight loss drugs has grown significantly with the development of new treatments targeting metabolic pathways.