This approval brings the total to 4 of medications approved to treat fibromyalgia; in addition to cyclobenzaprine HCl sublingual tablets (TNX-102 SL; Tonmya; Tonix Pharmaceuticals), there are pregabalin (Lyrica; Viatris), duloxetine (Cymbalta; Eli Lilly), and milnacipran (Savella; AbbVie).