For the first time in more than 18 years, the FDA has approved a new drug for malaria prevention. Washington-based 60 Degrees Pharmaceuticals LLC (60P), which got a green light to market Arakoda (tafenoquine) tablets for adults, said the approval marks the culmination of more than 30 years of R&D with the U.S. Army Medical Research and Materiel Command, starting with the discovery of tafenoquine at the Walter Reed Army Institute of Research.