Introduction: Nitazoxanide has shown efficacy in vitro against coronavirus infections (MERS, SARS, SARS-CoV-2). The aim of this report is to describe the results of treating COVID-19 positive patients with nitazoxanide in three clinical settings: pregnancy/puerperium, hospitalized patients in an Internal Medicine Service and in an ambulatory setting. Methodology: This was a prospective follow-up and report of COVID-19 cases in three different situations, pregnant women, hospitalized patients receiving medical attention in an Internal Medicine Service and ambulatory patients residing in Toluca City, and Mexico City. Results: The experience with a first group of 20 women, pregnant (17) or in immediate puerperium (3) was successful in 18 cases with two unfortunate deaths. The five cases treated in an Internal Medicine service showed a positive outcome with two patients weaned from mechanical ventilation. Of the remaining 16 patients treated in an ambulatory setting, all got cured. Nitazoxanide seems to be useful against SARS-CoV-2, not only in an early intervention but also in critical condition as well as in pregnancy without undesired effects for the babies. As an adjunctive therapy budesonide was used that seems to contribute to the clinical improvement. Conclusions: Nitazoxanide could be useful against COVID-19 as a safe and available regimen to be tested in a massive way immediately.

The use of nitazoxanide has previously yielded successful results in vitro against the coronavirus. The aim of the present study was to examine the efficacy of the use of nitazoxanide at an early stage among healthcare workers exhibiting symptoms of COVID-19. This was a prospective study carried out in 2020. Healthcare personnel who presented with COVID-19 symptoms, in different 3 hospitals were invited to take Paramix (nitazoxanide), 500 mg orally, every 6 h for 2 days and then 500 mg twice a day for 4 days. To compare the hospitalization percentage, a group of healthcare workers with a respiratory viral infection without COVID-19 criteria were also followed-up. Over a period of 3 months, 150 healthcare workers (111 women and 39 men) presented respiratory symptoms with COVID-19 criteria (mean age, 36±10.6 years; range, 18-68 years). Only one female medical doctor, one nurse and one male from the auxiliary services had to be hospitalized and one death was registered It was thus concluded that nitazoxanide yielded successful results in vitro against previous coronavirus and may prove to be useful against SARS-CoV-2 as an early intervention to avoid complications, decreasing the expected number of hospitalizations among infected healthcare workers.