Hypereosinophilic Syndrome Medication
- Author: Venkata Samavedi, MBBS, MD; Chief Editor: Emmanuel C Besa, MD more...
Medication Summary
The goals of pharmacotherapy are to reduce morbidity and to prevent complications in patients with hypereosinophilic syndrome.
Corticosteroids
Class Summary
Corticosteroids often cause a rapid reduction in level of the eosinophilia. The mechanisms for this are not entirely clear.
Prednisone (Deltasone, Meticorten, Orasone)
Initial DOC. Once eosinophils are suppressed, the dose may be slowly tapered. Patients whose condition responds to steroids tend to have a better prognosis.
Antineoplastic Agents
Class Summary
Chemotherapeutic agents may be used in patients whose conditions are refractory to steroid treatment. As a group, antineoplastic agents interfere with the production of eosinophils, but they may also cause toxicity to normal tissues, especially the bone marrow.
Hydroxyurea (Hydrea)
Second line of treatment. Goal is to reduce total white blood cell (WBC) count to < 10,000 cells/µL. One week of therapy may be required before a reduction of the eosinophil count is observed. Anemia and thrombocytopenia are common complications associated with this drug.
Vincristine (Oncovin, Vincasar)
May be instituted in patients whose condition fails or is only partially responsive to hydroxyurea. A response is often observed within 1-3 d. Marrow suppression is less common than with hydroxyurea, but occurrence of neurologic toxicity may limit treatment and closely resemble the neurologic symptoms of hypereosinophilic syndrome.
Chlorambucil (Leukeran)
Primary alkylating agent used in cases in which prednisone fails and in those patients who cannot tolerate hydroxyurea or vincristine. A reasonable alternative for long-term treatment. Bone marrow suppression may be a problem.
Immunomodulators
Class Summary
Immunomodulators are naturally produced proteins with antiviral, antitumor, and immunomodulatory actions. Alpha, beta, and gamma interferons may be given topically, systemically, and intralesionally. These agents have demonstrated efficacy in small trials.
Interferon alfa 2a (Roferon-A)
Has been reported to effectively suppress eosinophilia in several different patients using several different doses. Some patients have had progression of disease despite therapy.
Interferon alpha-2b (Intron A)
Has been reported to effectively suppress eosinophilia in several different patients using several different doses. Some patients have had progression of disease despite therapy.
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