Secondly, Regeneron has an impressive but oft-overlooked pipeline. Sarilumab, an IL-6R antibody, could pack some serious punch as a treatment for rheumatoid arthritis and non-infectious uveitis, while dupilumab, an Il-4R antibody, is tackling atopic dermatitis in children and adults (in separate trials). Not surprisingly, both experimental drug candidates are partnered with Sanofi. Wall Street believes if both are approved, they'll become blockbuster drugs ($1 billion+ in peak annual sales). Lastly, Regeneron could benefit from Amgen 's competing PCSK9 inhibitor Repatha, which is slated to report data from its long-term cardiovascular study in the second-half of 2016. If Repatha demonstrates superiority over current standards of care, it could be a major boon to all PCSK9 inhibitors, and not just Amgen's Repatha.