Exhibit 99.1

Sonus Pharmaceuticals Reports Third Quarter 2003 Financial Results

BOTHELL, Washington – November 5, 2003 – Sonus Pharmaceuticals, Inc. (Nasdaq:SNUS) today reported financial results for the third quarter ended September 30, 2003.

For the third quarter of 2003, Sonus reported a net loss of $2.5 million, or $0.15 per share, compared with a net loss of $3.3 million, or $0.24 per share, in the third quarter of 2002. For the first nine months of 2003, the Company reported a net loss of $7.9 million, or $0.53 per share, compared with a net loss of $9.2 million, or $0.68 per share, in the comparable period of 2002. The third quarter and year-to-date financial results for 2003 primarily reflected the continued investment in the clinical development program for Sonus’ lead cancer product, TOCOSOL™ Paclitaxel, and, to a lesser extent, new product development activities.

Cash and marketable securities totaled $22.1 million at September 30, 2003 compared with $16.3 million at December 31, 2002. The increase from year-end was due to the $13.1 million of net proceeds from the Company’s private placement in July 2003, offset in part by the $7.9 million year-to-date net loss.

About Sonus Pharmaceuticals

Sonus is currently developing a number of potential product candidates for the treatment of cancer utilizing its proprietary TOCOSOL drug delivery technology. The development of therapeutic drugs with the TOCOSOL technology may result in products that can be delivered more safely and effectively. TOCOSOL Paclitaxel is the Company’s lead product, which is a novel reformulation of paclitaxel, one of the world’s most widely prescribed chemotherapeutic agents. In Phase 2a clinical studies, TOCOSOL Paclitaxel is demonstrating promising safety and anti-tumor efficacy. Based on these clinical results, Sonus is implementing new clinical trials for TOCOSOL Paclitaxel to provide data that would be the basis for the product’s regulatory approval. The Company’s news releases and other information are available on the Sonus web site at www.sonuspharma.com.

Contact: Richard J. Klein, Chief Financial Officer, Sonus Pharmaceuticals, (425) 487-9500.

Quarterly Conference Call Information

Sonus will hold its quarterly conference call today, November 5, 2003, 1:30 P.M. Pacific Time, to discuss the third quarter financial results and to review progress on key objectives, including an update on the advancements with TOCOSOL Paclitaxel. A live webcast of the conference call can be accessed at www.sonuspharma.com/events.html, and an archive of the broadcast

 


 

Sonus Pharmaceuticals Reports Third Quarter 2003 Financial Results
Page 2
November 5, 2003

will be available through the same link. A telephone replay will also be available for 24 hours following the live broadcast at 800-642-1687 or 706-645-9291 for international calls; Pass Code: 3432933

Certain statements made in this press release are forward-looking such as those, among others, relating to the development of drug delivery products and potential applications for these products. As discussed in Sonus Pharmaceuticals’ filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K filed on March 10, 2003, actual results could differ materially from those projected in the forward-looking statements as a result of the following factors, among others: the Company’s products will require extensive clinical testing and approval by regulatory authorities; such approvals are lengthy and expensive and may never occur; risks that clinical studies with TOCOSOL Paclitaxel will not be successful or demonstrate increased efficacy; risks of successful development of additional drug delivery products.

###

 


 

Sonus Pharmaceuticals Reports Third Quarter 2003 Financial Results
Page 3
November 5, 2003

Condensed Statements of Operations
(Unaudited)
(in thousands, except per share amounts)

                                   
      Three Months Ended   Nine Months Ended
      September 30,   September 30,
     
 
      2003   2002   2003   2002
     
 
 
 
Revenue
  $     $     $ 25     $ 25  
Operating expenses:
                               
 
Research and development
    1,831       2,588       5,777       7,102  
 
General and administrative
    709       786       2,239       2,512  
 
   
     
     
     
 
Total operating expenses
    2,540       3,374       8,016       9,614  
 
   
     
     
     
 
Operating income (loss)
    (2,540 )     (3,374 )     (7,991 )     (9,589 )
Interest income, net
    39       104       130       362  
 
   
     
     
     
 
Income (loss) before taxes
    (2,501 )     (3,270 )     (7,861 )     (9,227 )
Taxes
                       
 
   
     
     
     
 
Net income (loss)
  $ (2,501 )   $ (3,270 )   $ (7,861 )   $ (9,227 )
 
   
     
     
     
 
Net income (loss) per share:
                               
 
Basic
  $ (0.15 )   $ (0.24 )   $ (0.53 )   $ (0.68 )
 
Diluted
  $ (0.15 )   $ (0.24 )   $ (0.53 )   $ (0.68 )
Shares used in calculation:
                               
 
Basic
    16,667       13,662       14,701       13,525  
 
Diluted
    16,667       13,662       14,701       13,525  

Condensed Balance Sheets
(in thousands)

                   
      September 30,   December 31,
      2003   2002
     
 
      (unaudited)        
Assets:
               
 
Cash and marketable securities
  $ 22,149     $ 16,334  
 
Other current assets
    176       290  
 
Property and equipment, net
    1,567       1,310  
 
 
   
     
 
Total assets
  $ 23,892     $ 17,934  
 
 
   
     
 
Liabilities and stockholders’ equity:
               
 
Accounts payable and accrued expenses
  $ 2,436     $ 1,801  
 
Lease obligations
    308       409  
 
Stockholders’ equity
    21,148       15,724  
 
 
   
     
 
Total liabilities and stockholders’ equity
  $ 23,892     $ 17,934