title: Hydroxyurea in sickle cell disease patients from Eastern Saudi Arabia.
abstract: OBJECTIVE
  To assess the efficiency and safety of hydroxyurea in patients with sickle cell disease from the Eastern Province, Kingdom of Saudi Arabia.
  
  
  METHODS
  The study was an open-label and uncontrolled trial. Patients older than 10 years of age with sickle cell disease who suffered 4 or more episodes of painful vaso-occlusive crises requiring admissions per year were included, 36 patients (23 males and 13 females) were included between June 1994 and June 1998. Patients were started on hydroxyurea at a dose of 8-10mg/kg per day and the dose was escalated to a maximum tolerated dose or a dose of 35 mg/kg per day. Blood count, renal and liver functions, and hemoglobin F levels were monitored regulary. Clinical response was assessed by record of number of vaso-occlusive crises, requirement for hospital admission and self scoring at the end of each year of treatment.
  
  
  RESULTS
  Thirty-six patients were enrolled in the study until the time of analysis of the data. The data of the first 27 patients (18 males and 9 females) who completed 12 months of therapy were analyzed and presented. There was significant reduction in leukocyte, platelet counts and rise in total hemoglobin and hemoglobin F. Hemoglobin F rose by 1.2-13 folds, from the baseline. Seventy-four percent of patients had at least 2 fold rise of maximum hemoglobin F. The mean maximum tolerated dose of hydroxyurea was 16.4 mg/kg. There was significant reduction in hospital admissions and hospital stay. No major side effects had occured.
  
  
  CONCLUSIONS
  Hydroxyurea seems to be effective in decreasing the frequency of vasooclusive crises in patient with sickle cell disease from Eastern Saudi Arabia. In this preliminary analysis no major side effects were observed. Long term side effects need to be monitored.
authors.affiliation: Department of Internal Medicine, Qatif Central Hospital, Kingdom of Saudi Arabia. aaljama@saudidoctors.org.sa
authors.forename: Ali H
authors.initials: AH
authors.lastname: Al-Jam'a
authors.forename: Ibrahim A
authors.initials: IA
authors.lastname: Al-Dabbous
mesh_terms: D000293:Adolescent; D000328:Adult; D000755:Anemia, Sickle Cell / Q000097:blood / Q000188:drug therapy*; D000986:Antisickling Agents / Q000494:pharmacology / Q000627:therapeutic use*; D002648:Child; D005260:Female; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D006918:Hydroxyurea / Q000494:pharmacology / Q000627:therapeutic use*; D008297:Male; D012529:Saudi Arabia
chemical_list: D000986:Antisickling Agents; D006918:Hydroxyurea