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There is currently no manufacturer warning information available for this drug.
Phentermine Hydrochloride, USP 15 mg and 30 mg is indicated as a short-term (a few weeks) adjunct in a regimen of weight reduction based on exercise, behavioral modification and caloric restriction in the management of exogenous obesity for patients with an initial body mass index ≥30 kg/m 2, or≥27 kg/m 2 in the presence of other risk factors (e.g., controlled hypertension, diabetes, hyperlipidemia).
Below is a chart of Body Mass Index (BMI) based on various heights and weights.
BMI is calculated by taking the patient’s weight, in kilograms (kg), divided by the patient’s height, in meters (m), squared. Metric conversions are as follows: pounds ÷ 2.2 = kg; inches x 0.0254 = meters.
The limited usefulness of agents of this class, including Phentermine hydrochloride, [ see CLINICAL PHARMACOLOGY (12.1, 12.2)] should be measured against possible risk factors inherent in their use such as those described below.
Phentermine Hydrochloride USP has the chemical name of α, α -Dimethylphenethylamine hydrochloride. The structural formula is as follows:
Phentermine Hydrochloride is a white, odorless, hygroscopic, crystalline powder which is soluble in water and lower alcohols; slightly soluble in chloroform and insoluble in ether.
Phentermine hydrochloride, an anorectic agent for oral administration, is available as:
a) powder-filled capsules containing 15 mg Phentermine hydrochloride (equivalent to 12 mg Phentermine) or 30 mg Phentermine hydrochloride (equivalent to 24 mg Phentermine) and inactive ingredients: corn starch, gelatin, lactose monohydrate and magnesium stearate. In addition, the 15 mg capsules contain D&C Yellow #10, FD&C Blue #1, FD&C Red #3, FD&C Red #40, titanium dioxide and the 30 mg capsules contain D&C Yellow #10, FD&C Red #3, titanium dioxide.
b) bead-filled capsules containing 30 mg Phentermine hydrochloride (equivalent to 24 mg Phentermine) and inactive ingredients: corn starch, sucrose, hypromellose, povidone, and talc. In addition, the capsule contains FD&C blue #1/Brilliant blue FCF Aluminum Lake, D&C red #28 and gelatin.