Phentermine is a medicine used to help people lose weight. It’s meant for adults with obesity or those who are overweight and haven’t had success losing weight through diet and exercise alone. Phentermine works by reducing your appetite, so you feel less hungry and eat less. This helps support weight loss when combined with healthy eating and regular physical activity.
This medicine is only available with a doctor’s prescription. It is not for casual weight loss and should only be used under medical supervision. Phentermine is classified as a Schedule 4 drug, which means it has a low risk of misuse, but it should still be taken carefully.
Common side effects include a dry mouth and trouble sleeping. These are usually mild and go away with time. Serious side effects, like heart valve problems or high blood pressure in the lungs, are very rare—especially when phentermine is taken by itself and not with other medications.
