Form: 10-Q

Quarterly report pursuant to Section 13 or 15(d)

EX-99.2

Published on

EXHIBIT 99.2

SECTION 906 CERTIFICATION OF PERIODIC REPORT

I, Richard J. Klein, Chief Financial Officer of Sonus Pharmaceuticals, Inc. (the
"Company"), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period
ended March 31, 2003 (the "Report") fully complies with the requirements
of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15
U.S.C. 78m or 780(d)); and

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

Dated: May 14, 2003

/s/ Richard J. Klein
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Richard J. Klein
Chief Financial Officer