[Sickle cell disease in the Democratic Republic of the Congo: what are the barriers to treatment using hydroxyurea?] / Drépanocytose en République Démocratique du Congo: quels sont les obstacles à un traitement par hydroxyurée?

INTRODUCTION: hydroxyurea is the unique medication that has been proven to prevent complications in patients with sickle cell disease and is approved by the Food and Drug Administration. This medication requires a prescription to be dispensed, it must be available and at an affordable price. The purpose of this study was to determine the availability and market price of hydroxyurea in the Democratic Republic of the Congo and to make a comparison between these two aspects in a small city, such as Mbujimayi, and in a big city, such as Lubumbashi. METHODS: we conducted a cross-sectional study in the context of a face-to-face survey involving 188 Congolese pharmacies from 1st April to 1st September 2017. RESULTS: hydroxyurea was available at 41/188 (22%) participating pharmacies, but more frequently at those of a big city than at those of a small city (34/96 versus 7/92). Most patients got a prescription (36/41; 88%). The average price of hydroxyurea was $15 (from $10 to $35 a blister packs of 25 capsules), which was higher than the purchasing power of the majority of sickle cell patients. Hydroxyurea is still an imported product from Europe, the United States or Asia. CONCLUSIONS: hydroxyurea is one of the main treatments to slow down disease progression in sickle cell patients. Nevertheless, in the Democratic Republic of the Congo, its availability could be improved, in particular in small cities, and its price is still too high.

Real-world experience using hydroxyurea in children with sickle cell disease in Lilongwe, Malawi.

INTRODUCTION: Sickle cell disease (SCD) is among the most common inherited hematologic diseases in sub-Saharan Africa (SSA). Historically, hydroxyurea administration in SSA has been restricted due to limited region-specific evidence for safety and efficacy. METHODS: We conducted a prospective observational cohort study of pediatric patients with SCD in Malawi. From January 2015 to November 2017, hydroxyurea at doses of 10-20 mg/kg/day was administered to children with clinically severe disease (targeted use policy). From December 2017 to July 2018, hydroxyurea was prescribed to all patients (universal use policy). RESULTS: Of 187 patients with SCD, seven (3.7%) died and 23 (12.3%) were lost to follow-up. The majority (135, 72.2%) were prescribed hydroxyurea, 59 (43.7%) under the targeted use policy and 76 (56.3%) under the universal use policy. There were no documented severe toxicities. Under the targeted use policy, children with SCD demonstrated absolute decreases in the rates of hospitalization (-4.1 per 1000 person-days; -7.2, -1.0; P = .004), fevers (-4.2 per 1000 person-days; -7.2, -1.1; P = .002), transfusions (-2.3 per 1000 person-days; 95% confidence interval: -4.9, 0.3; P = .06), and annual school absenteeism (-51.2 per person-year; -60.1, -42.3; P < .0001) within 6 months of hydroxyurea commencement. CONCLUSION: We successfully implemented universal administration of hydroxyurea to children with SCD at a tertiary hospital in Malawi. Similar to recently reported trials, hydroxyurea was safe and effective during routine programmatic experience, with clinical benefits particularly among high-risk children. This highlights the importance of continued widespread scale-up of hydroxyurea within SCD programs across SSA.