Hydroxyurea and pyridostigmine repurposed for treating Covid-19 multi-systems dysfunctions

Abstract

Early in the COVID-19 pandemic, medical care providers at an acute illness hospital received increasing numbers of post-acute advanced COVID-19 patients from referring hospitals where they were showing no signs of improvement after receiving treatments from standard Emergency Use Authorization (EUA)-type protocols. The care providers turned to repurposing medications to treat these patients and added hydroxyurea, a medication commonly used for treating sickle cell anemia, to the hospital's COVID-19 treatment protocol and began to see notable clinical improvements. As the pandemic continued and new concerns arose concerning COVID-19 complications, those same care providers again turned to repurposing drugs. Focusing on the neuromuscular effects seen in COVID-19 patients, care providers turned to medications used to treat chronic neuromuscular conditions. Post-acute advanced Covid-19 patients initially received an abbreviated course of hydroxyurea followed by titrated doses of pyridostigmine. Positive responses were noted with cognition, diminished oxygen demands, progressive decrease in ventilator support, improved swallowing, and mobility. The authors suggest repurposed drugs could have great utility for treating COVID-19. It is recommended larger, COVID-19 clinical trials be completed to include hydroxyurea and pyridostigmine for validating the outcomes and clinical observations seen in these presented cases.