Phentermine was approved by the Food and Drug Administration in 1959, and has grown increasingly popular as a weight loss aid since then. Phentermine is a stimulant that suppresses the appetite, and is meant to be used in conjunction with a healthy diet and exercise, according to Drugs.com. Because of the potential for abuse, phentermine diet pills were meant to be taken for no more than about 12 weeks, under a doctor’s supervision.
See a physician. According to Healthy Weight Forum, phentermine is similar in chemical composition to amphetamines, and can have strong side effects including dizziness and racing heart. Phentermine can react with other medications such as antidepressants and MAO inhibitors, so tell your doctor what other medications you are taking.
Make a plan. Phentermine is an appetite suppressant, but your body will build up a resistance to it, so you will need to learn portion control and how to make healthy choices while you are still taking it. According to the Centers for Disease Control and Prevention, to lose one to two pounds per week you need to cut 500 to 1,000 calories from your daily intake. People who lose one to two pounds per week by making consistent changes to their eating habits and lifestyle tend to keep the weight off, according to the CDC. Phentermine can help you get started, but no medication can do it for you.
Exercise every day. Start by walking for 30 minutes daily or doing something else that is not too strenuous. Make it a habit so that you will be able to continue once your phentermine prescription runs out. This will not only help you to lose weight, but it also will tone muscles and help you avoid the sagging skin that often accompanies rapid weight loss.
Stay hydrated. According to PubMed, the website of the National Center for Biotechnology Information, one of the side effects of phentermine is dry mouth. Drink at least 32 to 64 ounces of water every day to keep your body hydrated.