Fosamprenavir for Laryngopharyngeal Upper Airway Tissue Treatment and Enzyme Reduction

A repurposing approach, prospective, placebo-controlled clinical trial of FOS-SA (used at 1,400 mg fosamprenavir calcium, twice daily) for 12 weeks in medically refractory patients with clinically diagnosed moderate/severe LPR (RSI \> 13, RFS \> 7 and MII-pH confirmed laryngeal reflux event\[s\]).

Non-active placebo pill formulation