Valsts: Amerikas Savienotās Valstis
Valoda: angļu
Klimata pārmaiņas: NLM (National Library of Medicine)
ALLOPURINOL (UNII: 63CZ7GJN5I) (ALLOPURINOL - UNII:63CZ7GJN5I)
PD-Rx Pharmaceuticals, Inc.
ALLOPURINOL
ALLOPURINOL 100 mg
ORAL
PRESCRIPTION DRUG
THIS IS NOT AN INNOCUOUS DRUG. IT IS NOT RECOMMENDED FOR THE TREATMENT OF ASYMPTOMATIC HYPERURICEMIA. Allopurinol reduces serum and urinary uric acid concentrations. Its use should be individualized for each patient and requires an understanding of its mode of action and pharmacokinetics (see CLINICAL PHARMACOLOGY , CONTRAINDICATIONS , WARNINGS , and PRECAUTIONS ). Allopurinol is indicated in: - the management of patients with signs and symptoms of primary or secondary gout (acute attacks, tophi, joint destruction, uric acid lithiasis, and/or nephropathy). - the management of patients with leukemia, lymphoma and malignancies who are receiving cancer therapy which causes elevations of serum and urinary uric acid levels. Treatment with allopurinol should be discontinued when the potential for overproduction of uric acid is no longer present. - the management of patients with recurrent calcium oxalate calculi whose daily uric acid excretion exceeds 800 mg/day i
100 mg (white) scored, flat-faced beveled edge round tablets debossed with "2083/V". Bottles of 30, 60 and 90. Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].
Abbreviated New Drug Application
ALLOPURINOL- ALLOPURINOL TABLET PD-RX PHARMACEUTICALS, INC. ---------- ALLOPURINOL 100 MG SCORED TABLETS RX ONLY DESCRIPTION Allopurinol has the following structural formula: Allopurinol is known chemically as 1,5-dihydro-4 _H_-pyrazolo [3,4- _d_]pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Each scored white tablet contains 100 mg allopurinol and the inactive ingredients colloidal silicon dioxide, lactose monohydrate, magnesium stearate, microcrystalline cellulose and sodium starch glycolate. Each scored orange tablet contains 300 mg allopurinol and the inactive ingredients colloidal silicon dioxide, FD&C Yellow No. 6 Lake, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and sodium starch glycolate. Its solubility in water at 37°C is 80 mg/dL and is greater in an alkaline solution. CLINICAL PHARMACOLOGY Allopurinol acts on purine catabolism, without disrupting the biosynthesis of purines. It reduces the production of uric acid by inhibiting the biochemical reactions immediately preceding its formation. Allopurinol is a structural analogue of the natural purine base, hypoxanthine. It is an inhibitor of xanthine oxidase, the enzyme responsible for the conversion of hypoxanthine to xanthine and of xanthine to uric acid, the end product of purine metabolism in man. Allopurinol is metabolized to the corresponding xanthine analogue, oxipurinol (alloxanthine), which also is an inhibitor of xanthine oxidase. It has been shown that reutilization of both hypoxanthine and xanthine for nucleotide and nucleic acid synthesis is markedly enhanced when their oxidations are inhibited by allopurinol and oxipurinol. This reutilization does not disrupt normal nucleic acid anabolism, however, because feedback inhibition is an integral part of purine biosynthesis. As a result of xanthine oxidase inhibition, the serum concentration of hypoxanthine plus xanthine in patients receiving allopurinol for treatment of hyperuricemia is usually in the range of 0.3 to 0.4 mg/dL compared Izlasiet visu dokumentu