MGI Pharma (MOGN) 10-Q 2005 Q2 Quarterly report

EXHIBIT 32.2

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 MGI PHARMA, INC. (the “Company”) on Form 10-Q for the period ended June 30, 2005 as filed with the Securities Exchange Commission on the date hereof (the “Report”), I, James C. Hawley, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §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.

/s/ James C. Hawley

James C. Hawley

Senior Vice President and Chief Financial Officer

August 9, 2005