Country: United States
Language: English
Source: NLM (National Library of Medicine)
ALLOPURINOL (UNII: 63CZ7GJN5I) (ALLOPURINOL - UNII:63CZ7GJN5I)
Ranbaxy 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 tablets reduce 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 tablets are 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 tablets 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 in male patients and 750 mg/day i
100 mg white to off-white colored, round, beveled edged uncoated tablets with "RG10 " embossed on one side and breakline on the other side. The tablets are supplied in the following package sizes: Bottles of 100 tablets NDC 63304-539-01 Bottles of 1000 tablets NDC 63304-539-10 300 mg peach colored, round, beveled edged uncoated tablets with "RG11 " embossed on one side and breakline on the other side. The tablets are supplied in the following package sizes: Bottles of 100 tablets NDC 63304-540-01 Bottles of 500 tablets NDC 63304-540-05 Store at 20° - 25°C (68° - 77°F) [See USP Controlled Room Temperature]. You may report side effects to FDA at 1-800-FDA-1088. Manufactured for: Ranbaxy Pharmaceuticals Inc. Jacksonvilla, FL 32257 USA by: Ipca Laboratories Limited 48, Kandivli Ind Estate, Mumbai 400 067, India November 2011
Abbreviated New Drug Application
ALLOPURINOL- ALLOPURINOL TABLET RANBAXY PHARMACEUTICALS INC. ---------- ALLOPURINOL TABLETS, USP 100 MG AND 300 MG RX ONLY DESCRIPTION Allopurinol has the following structural formula: C H N O M.W. = 136.11 Allopurinol is known chemically as 1, 5-dihydro-_4H_-pyrazolo [3, 4-_d_] pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Its solubility in water at 37°C is 80.0 mg/dL and is greater in an alkaline solution. Each scored white to off-white tablet contains 100 mg allopurinol and the inactive ingredients lactose monohydrate, corn starch, sodium starch glycolate, povidone and stearic acid. Each scored peach tablet contains 300 mg allopurinol and the inactive ingredients lactose monohydrate, corn starch, sodium starch glycolate , FD & C yellow no. 6, povidone and stearic acid. 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. 5 4 4 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 tablets for treatment of hyperuricemia is usually in the range of 0.3 to 0.4 mg/dL compared to a normal level Read the complete document