Adipex, which is the brand name for phentermine, is a prescription medication primarily used for short-term weight loss in individuals who are obese or overweight and have risk factors such as high blood pressure, diabetes, or high cholesterol. It works by suppressing appetite, helping individuals eat less and reduce overall caloric intake. However, it is intended to be used in conjunction with a healthy diet and exercise program and is typically prescribed for a short duration due to its potential for side effects and dependence.