Neopharm 10-Q 2006 Q0 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of Title 18, United States Code), the undersigned officer of NeoPharm, Inc., a Delaware corporation (the “Company”), does hereby certify with respect to the Quarterly Report of the Company on Form 10-Q for the quarter ended September 30, 2005 as filed with the Securities and Exchange Commission (the “10-Q Report”) that:

(1)the 10-Q 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 10-Q Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 8, 2005	/s/ Guillermo A. Herrera
	Guillermo A. Herrera
	Chief Executive Officer

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* This certification shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.