Valsts: Amerikas Savienotās Valstis
Valoda: angļu
Klimata pārmaiņas: NLM (National Library of Medicine)
ALLOPURINOL (UNII: 63CZ7GJN5I) (ALLOPURINOL - UNII:63CZ7GJN5I)
St Marys Medical Park Pharmacy
ALLOPURINOL
ALLOPURINOL 300 mg
PRESCRIPTION DRUG
Abbreviated New Drug Application
ALLOPURINOL- ALLOPURINOL TABLET ST MARYS MEDICAL PARK PHARMACY ---------- 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 le Izlasiet visu dokumentu