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4-amino-1-[(2R,3S,4R,5R)-3,4-dihydroxy-5- (hydroxymethyl)oxolan-2-yl] pyrimidin-2-one
對急性非淋巴細胞白血病之誘發療法:一般Cytosar與其他抗癌藥物併用之劑量為連續靜脈輸注100mg/m2/天(第1~7天)或每12小時靜脈注射100mg/m2(第1~7天)。
腦膜性白血病之追管內用藥:劑量為5~75mg/m2身體表面積。投藥頻率從一天一次用藥四天到每四天一次。
食慾不振、噁心、嘔吐、腹瀉、口部及肛門潰瘍、肝功能障礙、發燒、皮疹、血栓靜脈炎。
快速靜脈注射較常發生噁心、嘔吐。
Distribution
Distribution t ½ is about 10 min.
Metabolism
Metabolized by deoxycytidine kinase and other nucleotide kinases to nucleotide triphosphate (active). Inactivated by a pyrimidine nucleotide deaminase to nontoxic uracil derivative.
Elimination
Elimination t ½ is about 1 to 3 h. About 80% is excreted in the urine within 24 h (90% of which is excreted as ara-U).
L-asparaginase
Prior therapy with L-asparaginase may increase the risk of acute pancreatitis.
Digoxin
Oral absorption of digoxin may be decreased.
Gentamicin
Gentamicin effectiveness against Klebsiella pneumoniae strains may be decreased.
Quinolone antibiotics
Cytarabine may decrease the oral absorption of quinolone antibiotics.
已知對本品過敏。
確定懷孕或可能懷孕的婦女不可使用本品。
2.迅速地實行大劑量的靜脈注射時,病人於注射後數小時內可能會發生噁心及可能嘔吐。如果改用點滴輸注,這現象即可相對地減少。
3.肝臟功能不良之病人用藥要小心及減低劑量。
4.使用Cytosar之病人要定期檢查骨髓、肝及腎之功能。
5.臨床醫師必須監視病人的血中尿酸濃度,並且在必須時提供如支持性療法和藥物,以控制血中尿酸濃度。



