Journal of Pharmacovigilance

Artesunate/amodiaquine-induced acute extrapyramidal reactions in children and younger adults: Case series assessment

9^th International Conference and Exhibition on Pharmacovigilance & Drug Safety

July 17-18, 2017 Munich, Germany

Mulugeta Russom, Dawit Tesfai, Semere Gebregiorgis, Abdulmumini Usman, Selam Mihreteab, Iyassu Bahta, Elsa Mekonnen, Selamawit Ghebrehiwet and Gelila Abrham

Ministry of Health, Eritrea
Asmara College of Health Sciences, Eritrea
World Health Organization, Eritrea

Posters & Accepted Abstracts: J Pharmacovigil

Abstract:

Introduction & Aim: Several studies conducted in African countries reported the artesunate and amodiaquine (AS/AQ) tablet as a safe and well-tolerated anti-malarial drug in children and younger adults. The Eritrean Pharmacovigilance Centre, however, received 43 acute extrapyramidal reactions associated with the AS/AQ tablet. The aim of this case series assessment was to assess the causal relationship between the AS/AQ and extrapyramidal reactions in children and younger adults and to investigate the factor(s) predisposing to the adverse drug reactions. Methods: The causal relationship of all the cases was first assessed individually using the Naranjo Probability Scale and then subjected to a case series assessment using Austin Bradford�??Hill criteria. Results: A total of 43 acute extrapyramidal reactions associated with the AS/AQ tablet were reported between 2012 and 16 November, 2015 to the Eritrean Pharmacovigilance Centre. The causality was found to be probable or highly probable for 33 (76.7%) of the cases and the rest (10; 23.3%) of the cases had a possible causal association. The extrapyramidal reactions had more or less similar clinical features in most of the cases and were characterized by abnormal involuntary contractions of muscles. The median age and body weight of the cases were 15 years and 40 kg, respectively, and 70% of them were males. 90.7% of the reactions manifested in children and younger adults (aged 26 years). In most of the cases, reactions manifested in the third day from the start of treatment and 88.3% of cases were hospitalized. Conclusion: The causal relationship between the AS/AQ tablet and extrapyramidal reactions in children and younger adults were found to be apparent and possibly owing to dose accumulation or an overdose of amodiaquine and/or genetic polymorphism.

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