What is phentermine?

What is phentermine and how does it work?

Phentermine is a stimulant similar to amphetamines. It activates the central nervous system (nerves and brain), raising heart rate and blood pressure while lowering appetite. Phentermine is a weight-loss medication that is used in conjunction with a healthy diet and exercise program to manage obesity, particularly in patients who have risk factors such as high blood pressure, high cholesterol, or diabetes.