Phentermine Hcl C-Iv

Description

Phentermine hydrochloride is a sympathomimetic amine anorectic. Its chemical name is α,α, dimethylphenethylamine hydrochloride. The structural formula is as follows: [Phentermine HCl Molecular Structure] C10H15N

What Is Phentermine Hcl C-Iv Used For?

Phentermine hydrochloride capsules are 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/m2, or ≥ 27 kg/m2 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. BODY MASS INDEX (BMI), kg/m2 [BMI] The limited usefulness of agents of this class, including phentermine, [see CLINICAL PHARMACOLOGY (12.1, 12.2)] should be measured against possible risk factors inherent in their use such as those described below.

Dosage and Administration

2.1 Exogenous Obesity Dosage should be individualized to obtain an adequate response with the lowest effective dose. The usual adult dose is 15 mg to 30 mg as prescribed by the physician, at approximately 2 hours after breakfast for appetite control. Administration of one 30 mg capsule daily has been found to be adequate in depression of the appetite for 12 to 14 hours. Phentermine is not recommended for use in pediatric patients ≤16 years of age. Late evening medication should be avoided because of the possibility of resulting insomnia. 2.2 Dosage in Patients With Renal Impairment The recommended maximum dosage of phentermine hydrochloride is 15 mg daily for patients with severe renal impairment (eGFR 15 to 29 mL/min/1.73m2). Avoid use of phentermine hydrochloride in patients with eGFR less than 15 mL/min/1.73m2 or end-stage renal disease requiring dialysis [see USE IN SPECIFIC POPULATIONS (8.6) and CLINICAL PHARMACOLOGY (12.3)].

Side Effects (Adverse Reactions)

The following adverse reactions are described, or described in greater detail, in other sections:

Drug Interactions

7.1 Monoamine Oxidase Inhibitors Use of phentermine is contraindicated during or within 14 days following the administration of monoamine oxidase inhibitors because of the risk of hypertensive crisis. 7.2 Alcohol Concomitant use of alcohol with phentermine may result in an adverse drug reaction. 7.3 Insulin and Oral Hypoglycemic Medications Requirements may be altered [see WARNINGS AND PRECAUTIONS (5.9)]. 7.4 Adrenergic Neuron Blocking Drugs Phentermine may decrease the hypotensive effect of adrenergic neuron blocking drugs.

Contraindications

Overdosage

The least amount feasible should be prescribed or dispensed at one time in order to minimize the possibility of overdosage. 10.1 Acute Overdosage Manifestations of acute overdosage include restlessness, tremor, hyperreflexia, rapid respiration, confusion, assaultiveness, hallucinations, and panic states. Fatigue and depression usually follow the central stimulation. Cardiovascular effects include arrhythmia, hypertension or hypotension, and circulatory collapse. Gastrointestinal symptoms include nausea, vomiting, diarrhea and abdominal cramps. Overdosage of pharmacologically similar compounds has resulted in fatal poisoning usually terminates in convulsions and coma. Management of acute phentermine hydrochloride intoxication is largely symptomatic and includes lavage and sedation with a barbiturate. Experience with hemodialysis or peritoneal dialysis is inadequate to permit recommendations in this regard. Acidification of the urine increases phentermine excretion. Intravenous phentolamine (Regitine®, CIBA) has been suggested on pharmacologic grounds for possible acute, severe hypertension, if this complicates overdosage. 10.2 Chronic Intoxication Manifestations of chronic intoxication with anorectic drugs include severe dermatoses, marked insomnia, irritability, hyperactivity and personality changes. The most severe manifestation of chronic intoxications is psychosis, often clinically indistinguishable from schizophrenia. See DRUG ABUSE AND DEPENDENCE (9.3).

How Supplied

Phentermine hydrochloride capsules USP, for oral administration, are available as: 15 mg: Grey/yellow powder filled capsules; imprinted “N1” in black ink and supplied as: NDC 11534-157-01 bottles of 100 NDC 11534-157-03 bottles of 1,000 30 mg: Blue/Clear powder filled capsules; imprinted “N16” in black ink and supplied as: NDC 11534-176-01 bottles of 100 NDC 11534-176-03 bottles of 1,000 Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature]. Protect from moisture. Dispense in a tight, light-resistant container as defined in the USP, with a child-resistant closure (as required). Keep out of the reach of children.