RT Journal Article SR Electronic T1 Preliminary report of a toxicity study of hydroxyurea in sickle cell disease JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 437 OP 439 DO 10.1136/adc.81.5.437 VO 81 IS 5 A1 M de Montalembert A1 P Bégué A1 F Bernaudin A1 I Thuret A1 D Bachir A1 M Micheau YR 1999 UL http://adc.bmj.com/content/81/5/437.abstract AB AIM To evaluate the tolerance of hydroxyurea in children affected with sickle cell disease. DESIGN Questionnaire study of French physicians likely to treat patients with sickle cell disease. Data were collected on 101 children with sickle cell disease, treated for a median of 22 months, 36 of whom were treated for more than three years. 13 children were younger than 5 years of age at inclusion. RESULTS Hydroxyurea was stopped for medical reasons in 11 patients: 6 failures, 1 pregnancy, 1 cutaneous rash, 1 leg ulcer, 1 lupus. Acute lymphoblastic leukaemia occurred in a girl treated for 1.5 months with hydroxyurea, this short interval arguing against a causative association. One 17 year old boy had paraparesis after 8 years of treatment. CONCLUSIONS No major short or medium term toxicity was related to hydroxyurea in this cohort of 101 children. However, the number of children treated for more than 3 years is too few to make firm conclusions on the long term tolerance of this drug.