Phentermine 37.5 mg is used as a short-term plan, along with a low-calorie diet, for weight reduction. This is an oval-shaped white color pill. It is a prescribed medicine. It works by decreasing appetite. Phentermine belongs to the group of medicines known as appetite suppressants that will significantly decrease the desire for extra calories, speed up metabolism, and increase fat burning. Do not change your dose or suddenly stop taking the medicine. This medicine is only for those who are obese and overweight people. This medicine isn’t commonly used because it has a lot of side effects compared to the other medications present in the market. The most common side-effect is dry mouth and trouble sleeping. It can also increase the heart rate and blood pressure. Immediately talk to your doctor if, you experiencing any side effects. Take phentermine 37.5 mg exactly as prescribed. Each form can have different strengths of phentermine, dosing, and instructions on how to take them. Ask your doctor if, you’re not sure about how to take the medication, dose, and more. Take this medication by mouth with a glass of water. Follow the directions on the prescription label.