Lorcaserin is a medication used for weight management, particularly in adults with obesity or who are overweight and have weight-related health issues. It functions by activating the 5-HT2C receptors in the brain, which are involved in appetite control. This activation helps reduce hunger and increase feelings of fullness, leading to reduced food intake. Lorcaserin was designed to provide weight loss benefits with fewer side effects compared to older appetite suppressants. However, its use requires careful monitoring due to potential side effects and contraindications with certain health conditions.