Published online Jan 25, 2022. doi: 10.5501/wjv.v11.i1.82
Peer-review started: May 24, 2021
First decision: June 17, 2021
Revised: June 23, 2021
Accepted: December 10, 2021
Article in press: December 10, 2021
Published online: January 25, 2022
Core tip: N-acetyl cysteine (NAC) is a well-known antioxidant and anti-inflammatory agent that has been considered beneficial in the treatment for coronavirus disease 2019 (COVID-19). Although previous studies in patients with chronic lung disease, chronic heart disease, immune-mediated disease, viral infections, and malignancy have shown promising results, there is currently no clinical evidence that NAC prevents COVID-19, alleviates the severity of COVID-19, or improves the overall outcome of COVID-19 patients.