BIORIDGE

PHARMA

Specially Distributors of Biotech Products

July 19, 2013

Dr. William A. Carter

Chairman and CEO

Hemispherx Biopharma, Inc. JFK Boulevard

Suite 660

Philadelphia, Pa 19103

Re: Specialty Distributor Purchase and Service Agreement between Hemispherx, Biopharma, Inc and Bio Ridge Pharma, LLC.

Dear Dr. Carter,

Bio Ridge Pharma would like to request an extension to the above mentioned contract through August 14, 2014 subject to the same terms and conditions currently in place.

Please sign this acceptance letter as acknowledgment of the extension and return to my attention via fax or e-mail. I can be reached at 973-564-8004 if you have any questions

or concerns.

Regards,

Robert Anderson

CFO

Bio Ridge Pharma, LLC

Phone: 973-564-8004

Fax: 973-564-8010

/S/: William A. Carter

(signature)

William A. Cartrer

(print name)

CEO and Chairman

(Title)

7/23/2013

(Date)