SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 27, 2004

Sepracor Inc.

(Exact name of registrant as specified in its charter)

Delaware	0-19410	22-2536587
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

84 Waterford Drive Marlborough, MA		01752
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (508) 481-6700

N/A

(Former name or former address, if changed since last report)

Item 12. Results of Operations and Financial Condition

On July 27, 2004, Sepracor Inc. announced its financial results for the quarter ended June 30, 2004. The full text of the press release issued in connection with the announcement is attached as Exhibit 99.1 to this Current Report on Form 8-K.

The information in this Form 8-K and the Exhibit attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such filing.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date:	July 27, 2004	SEPRACOR INC.


		By:	/s/ David P. Southwell
			David P. Southwell
			Executive Vice President and Chief
			Financial Officer

EXHIBIT INDEX

Exhibit No.		Description
99.1		Press Release dated July 27, 2004.