Science suggests that staying thin is little bit more complex than following dietary programs and regular exercises. Even if you eat right and stay active, obesity may be an inevitable part of your life--especially if you were unlucky enough to have inherited a genetic predisposition for the condition.

Weight loss drugs can be handy for people suffering from obesity, who face problems in overcoming the disorder through diet programs and exercise schedules. These drugs are approved by the Food & Drug Association. Obese people, who have difficulty losing weight through diet and exercise alone, can opt for FDA-approved prescription drugs.

According to the medical fraternity, diet pills alone cannot save you from obesity; rather control diet programs & exercise are a must along with diet pills that will provide additional help. One of the most common drugs used for controlling obesity is Phentermine.

Phentermine drug is for a short duration of time and taken along with prescribed diet to treat obesity. The magnitude of weight loss through Phentermine depends on the degree of caloric restriction and the use of a graded exercise program. Phentermine should only be used by patients who are at high medical risk because of their obesity and should not be used for cosmetic weight loss.

The body starts to build up a resistance to the effects of Phentermine after a few weeks of treatment, by which time the patient should be well on way to a new lifestyle and ready to stop taking Phentermine while continuing to maintain a healthy weight on their own. Taking Phentermine is not a substitute for proper diet. For maximum effect, Phentermine must be used in conjunction with a diet and exercise program.

Phentermine is the generic name of the drug. It is distributed under different brand names including ADIPEX-P and IONAMIN. There are many popular brand names of Phentermine. In terms of fighting obesity, they are all considered clinically equivalent in producing weight loss. Immediate release Phentermine pills enter the blood stream as soon as they are taken. It is advised to visit your medical practitioner before taking these diet drugs.

Meridia works by boosting levels of certain chemical messengers in the nervous system.