Cannabis Science (CBIS) 10-K 2010 FY Annual report

Exhibit 32.2

Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report of Cannabis Science, Inc. (the “Company”) on Form 10-K for the fiscal year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Richard Cowan, Chief Financial Officer of the Company certify, pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

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:  April 15, 2011

/s/ Richard Cowan
Richard Cowan
Chief Financial Officer