Post-COVID-19 olfactory dysfunction: carbamazepine as a treatment option in a series of cases
Claudia Cristina Ferreira Vasconcelos1, Mariana Beiral Hammerle2, Deborah Santos Sales1
1Departamento de Neurologia, Hospital Universitário Gaffrée E Guinle/HUGG Programa de Pós Graduação Em Neurologia da Universidade Federal Do Estado Do Rio de Janeiro (UNIRIO), 775 Mariz e Barros St, Tijuca, Rio de Janeiro, RJ, 22.270-004, Brazil.
Abstract:
Olfactory dysfunction is reported frequently in patients with coronavirus disease 2019. However, an effective treatment for this dysfunction is unknown. The present study evaluated carbamazepine as a treatment option for olfactory dysfunction based on its use in cases of neuralgia, especially of the V cranial nerve. The study included 10 patients with coronavirus disease with olfactory complaints who were part of a cohort of 172 coronavirus disease patients monitored for late neurological manifestations. Carbamazepine was administered for 11 weeks. The adverse effects reported were drowsiness (9/10) and dizziness (2/10); 9 of the 10 patients reported improved olfactory function after carbamazepine treatment. While the role of carbamazepine in the control of post-coronavirus disease olfactory dysfunction could not be confirmed in this study, the satisfactory response observed in most patients in this series suggests that further studies are warranted.
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