BELLUS Health Inc., a clinical stage biopharmaceutical company, develops therapeutics for the treatment of refractory chronic cough (RCC) and other cough hypersensitivity indications. Its lead product candidate includes BLU-5937, an antagonist of the P2X3 receptor, which is in Phase II clinical trial for treatment of RCC and chronic pruritus. The company was incorporated in 1993 and is based in Laval, Canada.