Adipex is a medication that stimulates a brain region called the hypothalamus and causes a series of “fight-or-flight” physiological responses, similar to those created by adrenaline, which is released while your body is under stress or excitement. By artificially creating a false fight-or-flight response, appetite is reduced, and energy is used for increasing heart rate and blood pressure, according to Adipex.org.
The generic name of the active ingredient in Adipex is phentermine hydrochloride. The chemical name for phentermine hydrochloride is α,α,-Dimethylphenethylamine hydrochloride. Phentermine hydrochloride is a white and odorless powder, according to Drugs.com. Phentermine hydrochloride belongs to the amphetamine class of drugs, and its actions include central nervous system stimulation. Increased heart rate and blood pressure have been seen with all drugs of this class. When used for weight loss, these drugs are also called “anorectics,” because they suppress appetite. Because phentermine hydrochloride affects the central nervous system, unpleasant neural consequences have been observed, including dizziness, headache, blurred vision, confusion and sleeplessness.
Dr. Donald Hensrud from MayoClinic.com cautions that because the clinical trials of phentermine were short and indicated a slight potential for abuse, phentermine was only approved by the Food and Drug Administration for short-term obesity treatment, defined by 12 weeks or less. Therefore, phentermine hydrochloride should not be used long-term. Also, discontinuation of treatment may result in regaining the weight previously lost.
Inactive Ingredients in Capsules
In the capsule form of Adipex, the following inactive ingredients are also found: corn starch, gelatin, lactose monohydrate, magnesium stearate, titanium dioxide, black iron oxide and food colorings. Although meant to be inactive, these ingredients may trigger allergies in some rare cases.
Inactive Ingredients in Tablets
In the tablet form of Adipex, sugar is added to enhance the flavor. Other inactive ingredients include corn starch, lactose, magnesium stearate, microcrystalline cellulose, pregelatinized starch and food colorings.
Taking Adipex together with other diet medications may cause serious consequences such as pulmonary hypertension. If not treated, pulmonary hypertension can be fatal. Also, Adipex may be addictive to some people, particularly those with drug abuse history. It should not be shared with anyone other than the prescription holder. If allergies occur with signs and symptoms such as rash, difficulty breathing or swelling, medical attention should be sought immediately.