Examples embody the allergy drugs fexofenadine (Allegra) and cetirizine (Zyrtec), as well as over-the-counter nasal steroids for allergic rhinitis, together with fluticasone (Flonase) and mometasone (Nasonex). Those medicines have gone via rigorous testing as part of the FDA’s prescription approval process. “The proof is excellent for these medicine,” Hatton says. The identical researchers also...