Страна: САЩ
Език: английски
Източник: NLM (National Library of Medicine)
Pentoxifylline (UNII: SD6QCT3TSU) (Pentoxifylline - UNII:SD6QCT3TSU)
AvKARE, Inc.
Pentoxifylline
Pentoxifylline 400 mg
PRESCRIPTION DRUG
Abbreviated New Drug Application
PENTOXIFYLLINE - PENTOXIFYLLINE TABLET, EXTENDED RELEASE AVKARE, INC. ---------- PENTOXIFYLLINE EXTENDED-RELEASE TABLETS, 400 MG. Rx only DESCRIPTION Pentoxifylline Extended-release Tablets for oral administration, contains 400 mg of the active drug and the following inactive ingredients: hydroxyethyl cellulose, isopropyl alcohol, magnesium stearate, povidone, and talc in an extended-release formulation. Pentoxifylline is a tri-substituted xanthine derivative designated chemically as 1-(5-oxohexyl)-3,7-dimethylxanthine that, unlike theophylline, is a hemorrheologic agent, i.e. an agent that affects blood viscosity. Pentoxifylline is soluble in water and ethanol, and sparingly soluble in toluene. The chemical structure is: Molecular weight: 278.31 Molecular formula: C H N O CLINICAL PHARMACOLOGY MODE OF ACTION Pentoxifylline and its metabolites improve the flow properties of blood by decreasing its viscosity. In patients with chronic peripheral arterial disease, this increases blood flow to the affected microcirculation and enhances tissue oxygenation. The precise mode of action of pentoxifylline and the sequence of events leading to clinical improvement are still to be defined. Pentoxifylline administration has been shown to produce dose-related hemorrheologic effects, lowering blood viscosity, and improving erythrocyte flexibility. Leukocyte properties of hemorrheologic importance have been modified in animal and _in vitro_ human studies. Pentoxifylline has been shown to increase leukocyte deformability and to inhibit neutrophil adhesion and activation. Tissue oxygen levels have been shown to be significantly increased by therapeutic doses of pentoxifylline in patients with peripheral arterial disease. PHARMACOKINETICS AND METABOLISM After oral administration in aqueous solution pentoxifylline is almost completely absorbed. It undergoes a first-pass effect and the various metabolites appear in plasma very soon after dosing. Peak plasma levels of the parent compound and its metabolites are reached within 1 hour. Прочетете целия документ