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Phentermine is among the most commonly prescribed diet pills to help obese individuals to lose weight in the United States. It is the generic name of a drug that has phentermine hydrochloride as its active ingredient. That said, it is also sold under a number of different trade names in the United States.
Among the various brands of Phentermine that are available in the US are: Adipex, Obenix, Oby-Trim, Zantryl, Phentrol, Phentromin, Phenetrex, Teramine, Pro-Fast SA, Mirapront, Suprenza, as well as others. Ionamin was once sold in the United States, but it has been discontinued.
As a prescription diet pill, Phentermine is an FDA approved drug for use by obese patients who have reached a certain body mass index (BMI) level, and who have an increased risk of at least one other weight related medical condition. This may include such health conditions such as high blood pressure, high cholesterol, and type II diabetes. This medication is only prescribed to individuals who meet these conditions.
When Phentermine is prescribed in the US, the dieter is also given instructions to follow a low calorie, portion controlled, healthy and nutritious diet, as well as a daily exercise program. The FDA has not approved this drug to be used as the sole effort in weight loss. In fact, it has been carefully labeled as a diet pill and not a weight loss medication, because its use alone does not cause fat to be reduced. It works alongside regular healthy dieting efforts to make the process faster and easier.
Equally, though, it is not meant to be a long term solution. The drug is meant to help with behavioral modifications that will become the long term effort for losing the weight and then maintaining that healthy weight level once the excess fat is gone. The drug is prescribed only for a few weeks because it is approved only for short term use. The reason for this is that, over time, the body builds a tolerance to the medication. This decreases its efficacy as the weeks go by. Using more of the medication does not improve its effectiveness at this point, but would only increase the risk of severe side effects and addiction. Therefore, the dieter is meant to use the time on the medication to build the right healthy lifestyle habits so that they can be continued afterward.
The benefits of using Phentermine diet pills include appetite suppression and an energy boost. The appetite suppression helps to make it easier to stick to a calorie reduced diet, while the energy boost helps to prevent fatigue so that the dieter will stick to his or her exercise program.
These effects are achieved through Phentermine’s stimulation of the central nervous system. This generates a number of reactions in the body, including an increased heart rate and higher blood pressure. It also influences a part of the brain called the hypothalamus, which is responsible for producing a chemical called norepinephrine. This is the brain chemical that is responsible for the fight or flight response and is also known for causing hunger pangs to shrink in many patients.