in four words: It is a lot... e.g., if you take what Merck paid for Cubist ($8.4 bn) as a barometer. Others like BioH have commented on the possible multiples... from a few billion to tens of billions, per multiple indications. Brilacidin stands a good chance of hitting the ground running given the strong results against Daptomycin, which brought in $257m in Q3 (~$1bn annually). again, all depends obv on approval (odds look good) and then market uptake (see Cubist tables below), but it seems we've got a winner in the making. Leo et al didn't realize its potential at first.
“This sheds a whole new light on Brilacidin for people that weren’t aware of the compelling power of the defensin-mimetic platform. Following many discussions, we believe that we are addressing market sizes in the billions of dollars annually given the expansiveness of indications that Brilacidin could potentially provide a substantial benefit over approved drugs today. If Brilacidin is clinically proven to be efficacious as we believe it is, we would expect to attain a significant share of those markets.”
Also see this earlier post on Valuation of Antibacterial Products (be forewarned: it's a long read) http://investorshub.advfn.com/boards/read_msg.aspx?message_id=109638519 http://aspe.hhs.gov/sp/reports/2014/antibacterials/rpt_antibacterials.cfm#_Toc382830323 (study itself) Table 11: Annual Total Net Revenues for CUBICIN from Launch (2003) to 2012 Year Total Net Revenues Year-to-Year % Change 2003 $3.7 0% 2004 $68.1 1741% 2005 $120.6 77% 2006 $194.7 61% 2007 $294.6 51% 2008 $433.6 47% 2009 $562.1 30% 2010 $636.4 13% 2011 $754.0 18% 2012 [a] $915.0 21% Source: Cubist, 2013 [a] The figure is the midpoint of the reported range of $900 to $930 million.
Table 12: Expected Market Share Estimates over Time for a New Antibacterial Drug Year Market Share Product Launch Success Probability [a] Expected Market Share Lower Bound Upper Bound 1 (Launch) 0.05% 0.11% 60% 0.07% 2 0.87% 1.91% 1.29% 3 1.57% 3.47% 2.33% 4 2.57% 5.68% 3.81% 5 3.92% 8.64% 5.81% 6 5.79% 12.77% 8.58% 7 7.52% 16.59% 11.15% 8 8.52% 18.80% 12.63% 9 10.10% 22.30% 14.98% 10 12.27% 27.08% 18.19% [a] See Section 3.2.12 for further discussion on the basis for this parameter The expected market share is computed as: (Lower Bound % × [1 – 60%]) + (Upper Bound % × 60%)