Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

 

In connection with the Quarterly Report of Adherex Technologies Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2012 (the “Report”), each of the undersigned, Rostislav Raykov, Chief Executive Officer of the Company, and Robert Andrade, Chief Financial Officer of the Company, hereby certifies pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

 

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

 

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: May 10, 2012

 

  By: /s/ Rostislav Raykov
    Rostislav Raykov
    Chief Executive Officer

 

Date: May 10, 2012

 

  By: /s/ Robert Andrade
    Robert Andrade
    Chief Financial Officer