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A dose of 75 microg/kg/d of i.v. anti-D increases the platelet count more rapidly and for a longer period of time than 50 microg/kg/d in adults with immune thrombocytopenic purpura.

Author(s): Newman GC, Novoa MV, Fodero EM, Lesser ML, Woloski BM, Bussel JB

Affiliation(s): Divisions of Hematology/Oncology, New York Presbyterian Hospital-Weill Medical College of Cornell University, 525 E. 68th Street, New York, NY 10021, USA.

Publication date & source: 2001-03, Br J Haematol., 112(4):1076-8.

Publication type: Clinical Trial; Randomized Controlled Trial

Treatment with 75 microg/kg/d intravenous (i.v.) anti-D was compared with 50 microg/kg/d in a prospective randomized study of 27 RhD-positive, human immunodeficiency virus-negative, adult, acute, non-splenectomized patients with immune thrombocytopenic purpura (ITP) and platelet counts < or = 30 x 109/l. The higher dose resulted in greater median d 1 (43 x 109/l vs. 7.5 x 109/l; P = 0.012) and d 7 (153 x 109/l vs. 64.5 x 109/l; P = 0.001) platelet increases despite no greater haemoglobin decrease. Children with acute ITP receiving 75 microg/kg/d had overnight platelet increases in seven out of nine cases. The duration of effect at the 75 microg/kg/d dose was 46 d vs. 21 d (P = 0.03). Adverse events were mild to moderate and ameliorated with prednisone and acetaminophen premedication.

Page last updated: 2006-01-31

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