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  • Title: [Anagrelide in control of myeloproliferative thrombocythemia: long-term experiences in 6 patients].
    Author: Burkhard R, Adam H, Widmer L, Honegger HP.
    Journal: Schweiz Med Wochenschr; 1998 Nov 14; 128(46):1808-12. PubMed ID: 9857387.
    Abstract:
    Symptomatic or asymptomatic chronic elevation of platelet count can be observed in all forms of myeloproliferative disorders (MPD). Benefits and limitations of the traditional platelet-reducing agents, such as radioactive phosphorus, alkylating agents, hydroxyurea and interferon alpha, are well known and have been largely described. Anagrelide (Agrelin) is an additional newer drug with a selective platelet-lowering effect. We describe our own long-term experience in 6 patients with MPD who were treated with anagrelide as part of a compassionate-use protocol between April 1991 and August 1997. The median duration of therapy was 54 months (range 17 to 75 months), with an overall response rate of 100% (complete and partial response for at least 4 weeks). The initial median platelet count of 1211 x 10(9)/l (range 847 to 2050 x 10(9)/l) was reduced rapidly and lastingly to 570 x 10(9)/l (range 216 to 667 x 10(9)/l) at the time of the last control. Under treatment with anagrelide 4 of the 6 patients showed a reduction of disease-associated symptoms or complications. Adverse reactions were generally mild and transitory, and no interruption or cessation of therapy was required. Development of drug resistance or late adverse events were not observed. Treatment with anagrelide is effective, safe and in our opinion easy to administer. It also appears to be suitable for long-term administration.
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