In the other hand, naproxen is another synthetic, small molecule NSAID that is a derivative of 2-naphthalene-acetic acid (Figure 7). It was first approved by the U.S. FDA in 1976 for oral use in the treatment of a host of painful inflammatory conditions such as ankylosing spondylitis, bursitis, polyarticular juvenile idiopathic arthritis, osteoarthritis, rheumatoid arthritis, tendonitis, dysmenorrhea pain, and gout [148,149]. The efficacy of naproxen in the treatment of critically ill, hospitalized COVID-19 patients is being evaluated in a randomized, open label clinical trial (NCT04325633; n = 584).