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EuropePMC; 2021.
Preprint in English | EuropePMC | ID: ppcovidwho-311808


Background: The rapid emergence and the high disease burden of the novel coronavirus Sars-CoV-2 has created a medical need for readily available drugs that can decrease viral replication or blunt the hyperinflammatory state leading to severe COVID-19 disease. Azithromycin is a macrolide antibiotic, known for its immunomodulatory properties. It has shown antiviral effect specifically against Sars-CoV-2 in vitro, and acts on cytokine signaling pathways that have been implicated in COVID-19. Methods: DAWn-Azithro is a randomized, open-label, phase 2 proof-of-concept, multicenter clinical trial, evaluating the safety and efficacy of azithromycin for treating hospitalized patients with COVID-19. It is part of a series of trials testing promising interventions for COVID-19, running in parallel and grouped under the name DAWn-studies. Patients hospitalized on dedicated COVID-wards are eligible for study-inclusion when they are symptomatic (i.e. clinical or radiological signs) and have been diagnosed with COVID-19 within the last 72 hours through PCR (nasopharyngeal swab or bronchoalveolar lavage), or chest CT scan showing typical features of COVID-19 and without alternate diagnosis. Patients are block-randomized (9 patients) with a 2:1 allocation to receive azithromycin plus standard of care versus standard of care alone. Standard of care is mostly supportive, but may comprise hydroxychloroquine, up to the treating physician’s discretion and depending on local policy and national health regulations. The treatment group receives azithromycin qd 500 mg during the first 5 consecutive days after inclusion. The trial will include 284 patients and recruits from 15 centers across Belgium. Primary outcome is time from admission (day 0) to life discharge or to sustained clinical improvement, defined as an improvement of two points on the WHO 7-category ordinal scale sustained for at least 3 days. Discussion: The trial investigates the urgent and still unmet global need for drugs that may impact on the disease course of COVID-19. It will either provide support or else justify the discouragement of the current widespread, uncontrolled use of azithromycin in patients with COVID-19. The analogous design of other parallel trials of the DAWN-consortium, will amplify the chance of identifying successful treatment strategies and allow comparison of treatment effects within an identical clinical context. Trial registration : EU Clinical trials register, EudraCT Nb 2020-001614-38. Start date 2020-04-22.