EX-99.1 2 c95821exv99w1.htm EXHIBIT 99.1 Exhibit 99.1
                     
CUSIP No.
  
834453 10 2 
               Exhibit 99.1
AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the shares of Common Stock of Somaxon Pharmaceuticals, Inc.
Dated: February 10, 2010
PROSPECT VENTURE PARTNERS III, L.P.
By: Prospect Management Co. III, L.L.C.
Its: General Partner
         
     
/s/ Dave Markland      
Dave Markland     
Attorney-in-Fact     
 
PROSPECT MANAGEMENT CO. III, L.L.C.
         
     
/s/ Dave Markland      
Dave Markland     
Attorney-in-Fact