Release Details

Isis Pharmaceuticals Reports Financial Results and Highlights for the First Quarter 2004

May 6, 2004

CARLSBAD, Calif., May 6 /PRNewswire-FirstCall/ -- Isis Pharmaceuticals, Inc. (Nasdaq: ISIS), today announced its financial results for the first quarter of 2004. The company's revenue for the three months ended March 31, 2004 was $12.3 million compared to $14.0 million for the same period in 2003. The decrease reflects the completion of Isis' Phase 3 development of Affinitak™ and an associated reduction in revenue, offset by revenue earned in connection with both the Alnylam Pharmaceuticals, Inc. alliance for RNAi therapeutics and an increase in revenue for the TIGER biosensor program, including new funding from the Defense Advanced Research Projects Agency (DARPA) under a subcontract from San Diego-based Science Applications International Corporation (SAIC).

Expenses

As illustrated in the Selected Financial Information in this press release, operating expenses on a proforma basis for the quarter-ended March 31, 2004 were $31.4 million compared to $32.9 million for the same period in 2003. The decrease was related to planned expense reductions that began in the second quarter of 2003. This decrease was offset in part by increased spending to support the development of other products in the company's pipeline and the TIGER biosensor program.

Total operating expenses for the quarter-ended March 31, 2004 included a charge of approximately $3.2 million in non-cash compensation expense due to variable accounting for stock options associated primarily with the employee stock option exchange program that was offered in the second quarter of 2003. Variable stock options can result in significant increases and decreases in non-cash compensation expense as a result of the variability in the company's stock price. The company's stock price increased 19.4% between December 31, 2003 and March 31, 2004.

Loss from Operations

Isis' loss from operations was $22.3 million for the first quarter 2004 compared to $18.9 million for the same period in 2003, according to generally accepted accounting principles (GAAP). The company's loss from operations for the first quarter of 2004 on a proforma basis was $19.1 million compared to $18.9 million in the same period in 2003. The proforma loss from operations was adjusted from GAAP to exclude non-cash compensation charges of $3.2 million for the first quarter 2004 compared to $9,000 for the same period in 2003. Loss from operations on a proforma basis remained relatively flat for the first quarter 2004 compared to the same period in 2003. Loss from operations, according to GAAP, increased due to the non-cash compensation expense recorded in the first quarter of 2004.

Net Loss

The company's net loss applicable to common stock for the quarter-ended March 31, 2004 was $26.5 million, or $0.47 per share, compared with a net loss applicable to common stock of $24.5 million, or $0.44 per share, for the same period last year. The increase in the net loss applicable to common stock was primarily a result of the increase in loss from operations.

Balance Sheet

Isis maintained a strong balance sheet at the end of the first quarter with $180.9 million in cash and short-term investments and working capital of $169.2 million. At December 31, 2003, Isis had cash and short-term investments of $215.5 million and working capital of $194.0 million. Cash and short-term investments and working capital decreased primarily as a result of cash used in operations, Isis' equity investment in Alnylam and the retirement of partner debt.

Isis' 2004 First-Quarter and Recent Highlights

"Isis owns a number of key assets that are capable of generating near-term revenue and value. Specifically, we recently initiated an alliance with Alnylam Pharmaceuticals, which is focused on discovering new RNAi drugs. This relationship exemplifies our ability to leverage our leading patent estate to generate revenue. Furthermore, this demonstrates our ability to successfully execute our business strategy of engaging in RNA-based drug discovery collaborations that increase the use of our technology and allow us to participate in the commercial upside of our partners' successes," said B. Lynne Parshall, Isis' Executive Vice President and CFO. "We also recently received a government contract for up to $19.5 million to continue the development of our novel biosensor. We are planning for its commercialization."

"We also made progress in the development of our antisense drugs. In January, we announced data from a Phase 2 study of ISIS 104838 in patients with rheumatoid arthritis, which demonstrated the drug is active," continued Ms. Parshall. "The company's pipeline, our most valuable asset, will reach a number of major development milestones in the second half of the year as we expect to report data from eight clinical trials. We look forward to this year of momentum for the company and our technology."

    Expanded RNA-Based Drug Discovery Efforts:


* Announced the extension of Isis' antisense drug discovery collaboration in cancer with Eli Lilly and Company. During this extension, Isis and Lilly will continue to utilize second and third generation chemistries to characterize and develop RNase H, siRNA, and splicing modulating inhibitors for the treatment of cancer. An important component of this extension will be an exploration of potential new anticancer drug targets using RNA-directed technologies. This oncology relationship, initiated in June 2002, builds on a broad, ongoing strategic alliance previously established by the companies to discover antisense drugs in the areas of inflammatory and metabolic diseases. * Formed strategic alliance with Alnylam Pharmaceuticals, the leading RNAi therapeutics company, to accelerate the development and commercialization of RNAi therapeutics. The alliance combines Isis' intellectual property and drug development expertise with Alnylam's intellectual property and research expertise in RNAi therapeutics. * Announced the achievement of two milestones in its antisense drug discovery partnership with Industrial Technology Research Institute (ITRI) of Taiwan, focused on the coronavirus associated with Severe Acute Respiratory Syndrome (SARS). The milestones relate to the identification of potent, second-generation antisense drugs that inhibit SARS virus replication and the successful completion of preclinical studies evaluating aerosol and parenteral delivery of antisense drugs as specified under the agreement. The achievement of these milestones resulted in payments to Isis.

Progress in Antisense Drug Discovery and Development:

* In a Phase 2 clinical trial of Isis' proprietary second-generation antisense drug ISIS 104838, evaluable rheumatoid arthritis patients who received the two highest doses studied experienced a positive disease response. An initial biomarker study showed the drug distributed to synovial tissue and reduced TNF-alpha mRNA levels in synovium in a dose-dependent manner. ISIS 104838 is an antisense inhibitor of TNF-alpha. * In preclinical studies, an antisense drug suppressed the production of the mutant protein Cu/Zn superoxide dismutase (SOD1), a molecule associated with an aggressive form of amyotrophic lateral sclerosis (ALS). Leading neurodegenerative researchers conducted this study with funding from The ALS Association. Researchers believe that decreasing the amount of mutant SOD1 in the brain of patients with this condition could potentially modify or halt the progression of the disease.

Granted New Funding for TIGER Biosensor Program:

* Received a two-year contract providing up to $19.5 million for the continued development of its TIGER biosensor system to identify infectious agents in biological warfare attacks. In a single test, TIGER can rapidly and accurately identify essentially all infectious organisms contained in a sample. The company has completed proof-of-concept studies, and is currently planning for the initial commercialization of this technology within government markets.

Isis will conduct a live webcast conference call to discuss this earnings release on Thursday, May 6th at 10:00 am Eastern time. To participate over the Internet go to http://www.firstcallevents.com/service/ajwz405840956gf12.html or http://www.isispharm.com. A replay of the webcast will be available at these addresses for up to 30 days.

Isis Pharmaceuticals, Inc. is exploiting its expertise in RNA to discover and develop novel human therapeutic drugs for its pipeline and its partners. The company has successfully commercialized the world's first antisense drug and has 11 antisense products in development to treat metabolic, cardiovascular, inflammatory and viral diseases and cancer. Through its Ibis Therapeutics® program, Isis is developing a biosensor to identify infectious organisms, and is discovering small molecule drugs that bind to RNA. As an innovator in RNA-based drug discovery and development, Isis is the owner or exclusive licensee of more than 1,300 issued patents worldwide. Additional information about Isis is available at www.isispharm.com.

This press release includes forward-looking statements regarding our business, the financial position of Isis Pharmaceuticals, and the therapeutic and commercial potential of our technologies and products in development. Any statement describing our goals, expectations, intentions or beliefs is a forward-looking statement and should be considered an at-risk statement, including those statements that are described as Isis' clinical goals. Such statements are subject to certain risks and uncertainties, particularly those inherent in the process of developing technology and systems used to identify infectious agents, discovering and commercializing drugs that are safe and effective for use as human therapeutics and in the endeavor of building a business around such products and services. Actual results could differ materially from those discussed in this press release. As a result, you are cautioned not to rely on these forward-looking statements. These and other risks concerning Isis' research and development programs are described in additional detail in Isis' Annual Report on Form 10-K for the year ended December 31, 2003, which is on file with the U.S. Securities and Exchange Commission. Copies of this and other documents are available from the company.

Ibis Therapeutics® is a registered trademark of Isis Pharmaceuticals, Inc.

                            ISIS PHARMACEUTICALS, INC.
                          SELECTED FINANCIAL INFORMATION
                      (In Thousands, Except Per Share Data)
                        Condensed Statements of Operations


Three months ended, March 31, 2004 2003

Revenue: (unaudited) Research and development revenues under collaborative agreements $6,998 $13,780 Licensing revenue 5,305 200 Total revenue 12,303 13,980

Expenses: Research and development 28,947 30,261 General and administrative 2,453 2,622 Compensation related to stock options 3,238 9 Total operating expenses 34,638 32,892

Loss from operations (22,335) (18,912)

Investment and other income 1,133 1,636 Interest expense (5,104) (4,608) Loss on investments -- (2,438)

Net loss (26,306) (24,322)

Accretion of dividends on preferred stock (181) (171)

Net loss applicable to common stock $(26,487) $(24,493)

Basic and diluted net loss per share $ (0.47) $(0.44) Shares used in computing basic and diluted net loss per share 55,858 55,375



Reconciliation of GAAP to Proforma Basis: Operating Expenses and Loss From Operations

Three months ended, March 31, 2004 2003 (unaudited)

As reported operating expenses according to GAAP $34,638 $32,892

Excluding compensation expense related to stock options 3,238 9

Proforma operating expenses $31,400 $32,883

As reported loss from operations according to GAAP $(22,335) $(18,912)

Excluding compensation expense related to stock options 3,238 9

Proforma loss from operations $(19,097) $(18,903)



Condensed Balance Sheets (In Thousands)

March 31, December 31, 2004 2003 (Unaudited) Assets: Current assets $208,881 $239,561 Property, plant and equipment, net 32,721 34,790 Other assets 71,124 60,591 Total assets $312,726 $334,942 Liabilities and stockholders' equity: Current liabilities $39,643 $45,557 5.5% convertible subordinated notes 125,000 125,000 Long-term obligations, net of current portion 94,558 88,397 Long-term deferred revenue, net of current portion 5,971 8,810 Stockholders' equity 47,554 67,178 Total liabilities and stockholders' equity $312,726 $334,942

SOURCE Isis Pharmaceuticals