Prepared by MERRILL CORPORATION

ARENA PHARMACEUTICALS, INC.
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

DELAWARE (STATE OR OTHER JURISDICTION OF INCORPORATION OR ORGANIZATION)		23-2908305 (I.R.S. EMPLOYER IDENTIFICATION NO.)
6166 Nancy Ridge Drive, San Diego, CA (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)		92121 (ZIP CODE)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Indicate the number of shares outstanding of each of issuer's classes of
common stock, as of the latest practicable date.

COMMON STOCK, $0.0001 PAR VALUE		27,558,788 SHARES

Class		Outstanding at July 31, 2001

Arena Pharmaceuticals, Inc.
Condensed Consolidated Statements of Operations
(Unaudited)

Arena Pharmaceuticals, Inc.
Condensed Consolidated Cash Flow Statements
(Unaudited)

The accompanying unaudited financial statements of Arena Pharmaceuticals, Inc. have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair presentation have been included. Interim results are not necessarily indicative of results for a full year.

The balance sheet at December 31, 2000 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. These financial statements should be read in conjunction with the audited financial statements and footnotes thereto included in the Annual Report on Form 10-K, for the year ended December 31, 2000, as filed with the Securities and Exchange Commission ("SEC").

In accordance with SFAS No. 128, Earnings Per Share, and SEC Staff Accounting Bulletin (or "SAB") No. 98, basic net loss per share is computed by dividing the net loss for the period by the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed by dividing the net loss for the period by the weighted average number of common and common equivalent shares outstanding during the period.

Under the provisions of SAB No. 98, common shares issued for nominal consideration, if any, would be included in the per share calculations as if they were outstanding for all periods presented. No common shares have been issued for nominal consideration.

During the six months ended June 30, 2001 and the year ended December 31, 2000, in connection with the grant of stock options to employees, the Company recorded deferred stock compensation totaling approximately $226,000 and $11.6 million, respectively, representing the difference between the exercise price and the estimated market value of the Company's common stock as determined by the Company's management, or quoted market value after July 28, 2000, on the date such stock options were granted. Deferred compensation is included as a reduction of stockholders' equity and is being amortized to expense over the vesting period of the options in accordance with FASB Interpretation No. 28, which permits an accelerated amortization methodology. During the six months ended June 30, 2001 and 2000, the Company recorded amortization of deferred compensation expense of approximately $2.3 million and $1.8, respectively. At June 30, 2001, total charges to be recognized in future periods from amortization of deferred stock compensation are anticipated to be approximately $1.9 million, $2.7 million, $1.1 million, and $119,000 for the remaining six months of 2001, and for the years ending December 31, 2002, 2003 and 2004, respectively.

In January 2000, March 2000 and April 2000 the Company sold Shares of Series E Convertible Redeemable Preferred Stock, Series F Convertible Redeemable Preferred Stock and Series G Convertible Redeemable Preferred Stock, respectively, at what management believed was fair value. Subsequent to the commencement of the initial public offering process, the Company re-evaluated the fair value of its common stock as of January 2000, March 2000 and April 2000 and determined it to be $4.68, $13.50 and $13.50, respectively. The Company recorded a non-cash preferred stock charge in the amount of approximately $22.4 million in the six months ended June 30, 2000. The Company recorded the charge at the date of issuance by offsetting charges and credits to preferred stock, without any effect on stockholders' equity. The non-cash preferred stock charge increases the loss applicable to common stockholders in the calculation of basic net loss per share for the three and six months ended June 30, 2000.

On July 28, 2000 the Company completed an initial public offering in which it sold 6,000,000 shares of common stock at $18.00 per share for net proceeds of approximately $98.8 million, net of underwriting discounts, commissions and offering expenses. Upon the closing of the offering, all of the Company's redeemable convertible preferred stock converted into 12,698,578 shares of common stock.

On August 10, 2000 the underwriters exercised an over-allotment option to purchase an additional 900,000 shares resulting in net proceeds to the Company of approximately $15.1 million.

On June 21, 2001 the Company completed a follow-on offering in which it sold 4,000,000 shares of common stock at $27.50 per share for net proceeds of approximately $103.5 million, net of underwriting discounts, commissions and offering expenses.

On June 27, 2001 the underwriters exercised an over-allotment option to purchase an additional 750,000 shares resulting in net proceeds to the Company of approximately $19.5 million. The net proceeds were received by the Company on July 2, 2001.

On February 15, 2001 the Company completed the acquisition of Bunsen Rush Laboratories, Inc. ("Bunsen Rush") for cash of $15.0 million. The net assets, revenues and operations of Bunsen Rush were not material to the Company. Substantially all of the purchase price has been assigned to acquired technology and other intangibles, which are being amortized over 10 years. Had the acquisition been completed on January 1, 2000 or 2001, the Company's pro forma revenues for the periods reported on this Form 10-Q would not have been materially different than as reported herein, and net loss and net loss per share would have been impacted by the amortization of intangible assets described previously and the reduction of interest income as a result of the use of cash to effect the acquisition.

In June 2001, the Financial Accounting Standards Board ("FASB") issued Statements of Financial Accounting Standards ("SFAS") No. 141, "Business Combinations", and No. 142, "Goodwill and Other Intangible Assets", effective for fiscal years beginning after December 15, 2001. Under the new rules, goodwill and intangible assets deemed to have indefinite lives will no longer be amortized but will be subject to annual impairment tests in accordance with the Statements. Other intangible assets will continue to be amortized over their useful lives.

The Company will apply the new rules on accounting for goodwill and other intangible assets beginning in the first quarter of 2002. The Company has not yet determined what impact SFAS No. 141 and No. 142 will have on the results of operations and financial position of the Company.

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This discussion and analysis should be read in conjunction with our financial statements and accompanying notes included in this report and the financial statements and notes thereto for the year ended December 31, 2000 included in the Company's Annual Report on Form 10-K, which was filed with the SEC. Operating results are not necessarily indicative of results that may occur in future periods.

Certain statements contained in this Form 10-Q, other securities filings, press releases, interviews, our web-site (www.arenapharm.com) and other public statements that are not historical facts, including those statements that refer to our plans, prospects, expectations, strategies, intentions, hopes and beliefs, constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. You should not place undue reliance on these forward-looking statements. These statements involve risks, uncertainties and other factors, including those described below and elsewhere in this Form 10-Q, that may cause our actual results or timing of events to differ materially from any expressed or implied by these forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as "may," "will," "should," "expects," "plans," "anticipates," "believes," "estimates," "predicts," "potential," "continue," or the negative of these terms or other comparable terminology. Examples of such forward-looking statements include, but are not limited to, statements about our plans and objectives during the remainder of 2001 and beyond, and our plans and objectives generally, statements about our expected receipts of revenues from our collaborations, and our collaborations generally, statements about our future operating losses and anticipated operating and capital expenditures, statements about increases in our research and development expenses, statements about future non-cash charges related to option grants to our employees, statements about the sufficiency of our cash on hand and the net proceeds from our initial public offering and recent follow-on offering to fund our operations for the next two years, statements about anticipated hiring, and statements about the effect of changes in interest rates on our business and financial results. Factors that might cause such a difference include, but are not limited to, those discussed elsewhere in this document and those discussed in "Risk Factors" in our registration statement filed June 21, 2001 on Form S-1, as amended, and in our Annual Report on Form 10-K. We assume no obligation to update these forward-looking statements as circumstances change in the future.

We were incorporated on April 14, 1997 in the state of Delaware and commenced operations in July 1997. We are an emerging biopharmaceutical company focused principally on discovering drugs that act on an important class of drug targets called G protein-coupled receptors, or GPCRs. We have developed a technology called Constitutively Activated Receptor Technology, or CART, that can be applied to GPCRs and other classes of receptors to identify drug leads. We believe that CART is a more efficient drug discovery technique than traditional drug discovery techniques. Using CART, we have discovered new drug leads in the areas of obesity and schizophrenia. In both of these programs, drug leads were discovered within 18 months, which is substantially less time than might be required to discover a drug lead using traditional drug discovery techniques.

In January 2001, we purchased a facility we were leasing along with an adjoining building that is currently leased to a tenant at 6138-6150 Nancy Ridge Drive in San Diego, California. We paid cash of $5.4 million and will amortize the building cost over the building's useful life, estimated to be 20 years. We assumed the lease with the tenant, and the term of the lease with the tenant expires on August 31, 2001. The tenant has paid all rents through the expiration of the lease.

In January 2001, we signed an amendment expanding our original May 2000 agreement with Taisho Pharmaceutical Co., Ltd. ("Taisho") whereby Taisho was granted world-wide rights to our 18-F Program, an obesity orphan receptor target and small molecule modulators. In accordance with the amendment, Taisho made a one-time payment in the first quarter of 2001 to us for the 18-F Program based upon work already completed by the Company. In addition, we may receive additional milestone and research funding payments and royalties on drug sales, if any.

In February 2001, for $15.0 million in cash we acquired, through our wholly-owned subsidiary, BRL Screening, Inc., all of the outstanding capital stock of Bunsen Rush, a privately-held research-based company that provides receptor screening for the pharmaceutical and biotechnology industries using its proprietary and patented Melanophore Technology. Melanophore Technology is a function-based screening technology used to identify compounds that interact with cell surface receptors, including known and orphan GPCRs and tyrosine kinase receptors, or TKRs. The functional nature of Melanophore Technology eliminates the need for radioactive or fluorescent screening techniques and provides a simple and sensitive means to detect cellular signals generated by activated GPCRs.

In April 2001, we signed a binding letter of intent with Axiom Biotechnologies, Inc. ("Axiom") for a collaborative research program involving Axiom's proprietary RHACE™ Technology and Human Cell Bank, as well as the purchase by us of $2.0 million of Axiom's preferred stock. Axiom's unique assets include the Axiom Human Cell Bank, a large pharmacologically and genetically characterized collection of human cells. We have already initiated the scientific collaboration, and expect to complete the purchase of Axiom's stock in August 2001. Under the scientific collaboration, we will jointly develop and share information related to the localization of known GPCRs within human cell lines owned by Axiom. Axiom will also profile several thousand of our small molecule compounds using its technologies and we will have exclusive rights to these data. We will exclusively own the information related to the localization of orphan GPCRs within these cell lines.

In June 2001, we entered into a letter of intent to purchase property located at 6145 Nancy Ridge Drive for approximately $5.1 million. The building located on the property totals approximately 48,000 square feet of space suitable for office and laboratory expansion. We intend to complete this purchase by August 2001, and expect to occupy the building in 2002.

In June 2001, we entered into an agreement with ICI Group ("ICI") to apply our CART technology to olfactory and gustatory GPCRs. The initial stage of research provided for under the agreement will last approximately six months. We intend to use our CART technology to develop olfactory and/or gustatory GPCR assays for ICI and then screen using compounds supplied by ICI businesses.

In June 2001, we signed an agreement with TaiGen Biotechnology Co., Ltd. ("TaiGen"), a start-up biopharmaceutical organization focused on the discovery and development of innovative therapeutics, which became effective in July 2001. In exchange for equity in TaiGen's series A preferred financing, TaiGen has the right to select and obtain several GPCRs from us. We will activate, develop a screening assay and transfer selected activated receptors to TaiGen. We will not initially receive cash payments from TaiGen, however, we may receive cash royalty payments based on annual TaiGen licensing revenue derived from sales of drugs discovered using our screening assays. We expect to recognize revenue, in the form of equity participation, upon completion of our performance obligations and transfer of selected receptor screens to TaiGen. We also expect to account for our ownership interest using the equity method of accounting.

Since our inception, we have devoted substantially all of our resources to the research and development of CART. We have incurred significant operating losses since our inception and, as of June 30, 2001, we had an accumulated deficit of $22.8 million. Our prospects should be considered in light of the risks, expenses and difficulties encountered by companies in the early stages of development, particularly those companies in the rapidly changing pharmaceutical and biotechnology industries.

We plan to pursue several specific objectives during the remainder of 2001, namely:

We have recently initiated Project Genesis, an internal drug discovery program using a combination of CART, Melanophore Technology and other technologies that we believe will allow us to discover a substantial number of unique small molecule drug leads and drug candidates. With the recent completion of the sequencing of the human genome, we view Project Genesis as a logical extension of our scientific and business capabilities. Indeed, to the extent that the human genome project has identified all of the genes within humans, we believe that Project Genesis will allow us to discover new drug leads at all of the estimated 800 therapeutically relevant GPCRs.

We may enter into collaborative arrangements at any stage of Project Genesis with respect to any CART-activated receptor, drug leads or drug candidates that we discover.

Our ability to achieve our identified goals or objectives is dependent upon many factors, some of which are out of our control and we may not achieve our identified goals or objectives.

Our quarterly operating results will depend upon many factors, including the expiration or termination of research contracts with our collaborators, the size of future collaborations, the success rate of our technology collaborations leading to milestones and royalties, and general and industry-specific economic conditions which may affect research and development expenditures. As a consequence, our revenues in future periods are likely to fluctuate significantly from period to period.

Revenues for the quarter ended June 30, 2001 increased $2.0 million, or 158%, to $3.3 million compared to $1.3 million for the same quarter last year. The increase was primarily attributable to collaborations with Eli Lilly and Taisho, both significant customers, which included research funding, milestone payments, and technology access and development fees. Research funding is recognized as revenue when the services are rendered. Revenues from technology access and development fees are recognized over the term of the collaboration. Revenues from milestone payments are recognized when the milestone is achieved. Our collaborators often pay us before we recognize the revenue and these payments are deferred until earned. As of June 30, 2001 we had current and long-term deferred revenues totaling approximately $1.1 million.

Research and development expenses increased $2.5 million, or 95%, to $5.2 million for the quarter ended June 30, 2001 from $2.7 million for the same quarter last year. The increase was primarily due to an increase in wages and benefits due to an increase in scientific personnel, along with an increase in lab supplies and equipment costs to support the personnel in order to expand the application of our technology. As of June 30, 2001, all research and development costs have been expensed as incurred. We believe that continued investment in research and development is critical to attaining our strategic objectives and we expect these expenses to continue to increase in the near and long-term.

General and administrative expenses increased $836,000 to $1.3 million for the quarter ended June 30, 2001 from $496,000 for the quarter ended June 30, 2000. The increase was a result of increased personnel added to support a growing company as well as supporting the needs of a public company. General and administrative expenses consist primarily of salaries and related personnel expenses for executive, finance and administrative personnel, professional fees, and other general corporate expenses. We expect that our general and administrative expenses will continue to increase to support our growth and requirements as a public company.

Deferred compensation for options granted to employees has been determined as the difference between the exercise price and the fair value of our common stock, as estimated by us, or quoted market value after July 28, 2000, for financial reporting purposes, on the date options were granted. Deferred compensation for options granted to consultants was determined in accordance with Statement of Financial Accounting Standards No. 123 as the fair value of the equity instruments issued and is periodically remeasured as the underlying options vest in accordance with EITF 96-18.

For the quarter ended June 30, 2001, we recorded amortization of deferred compensation of approximately $1.1 million, compared to $1.4 million for the quarter ended June 30, 2000.

Interest income increased $1.0 million to approximately $1.5 million for the quarter ended June 30, 2001 from $466,000 for the same quarter last year, due to higher average cash balances primarily related to our Initial Public Offering in July 2000 through which we raised gross cash proceeds of $124.2 million.

Interest expense decreased $28,000 to $30,000 for the quarter ended June 30, 2001 from $58,000 for the same quarter last year. This decrease was due to a convertible note to a related party that was converted into common stock in July of 2000.

Other income increased approximately $84,000 to $98,000 for the quarter ended June 30, 2001 from $14,000 for the quarter ended June 30, 2000. This increase was due primarily to rental income earned in 2001 related to a tenant's lease we assumed when we acquired the 6138-6150 facility in January 2001.

Revenues for the six months ended June 30, 2001 increased $7.4 million, or 577%, to $8.7 million compared to $1.3 million for the same period last year. The revenues for the six months ended June 30, 2001 were primarily attributable to our collaborations with Eli Lilly and Taisho, both significant customers, which included research funding, milestone payments, and technology access and development fees. Research funding is recognized as revenue when the services are rendered. Revenues from technology access and development fees are recognized over the term of the collaboration. Revenues from milestone payments are recognized when the milestone is achieved. Our collaborators often pay us before we recognize the revenue and these payments are deferred until earned. As of June 30, 2001 we had current and long-term deferred revenues totaling approximately $1.1 million.

Research and development expenses increased $4.0 million, or 80%, to $9.1 million for the six months ended June 30, 2001 from $5.1 million for the same period last year. The increase was due primarily to an increase in wages and benefits due to an increase in scientific personnel, along with an increase in lab supplies and equipment costs to support the personnel in order to expand the application of our technology. As of June 30, 2001, all research and development costs have been expensed as incurred. We believe that continued investment in research and development is critical to attaining our strategic objectives and we expect these expenses to continue to increase in the near and long-term.

General and administrative expenses increased $1.4 million to approximately $2.3 million for the six months ended June 30, 2001 from $920,000 for the six months ended June 30, 2000. The increase was a result of increased personnel added to support a growing company as well as supporting the needs of a public company. General and administrative expenses consist primarily of salaries and related personnel expenses for executive, finance and administrative personnel, professional fees, and other general corporate expenses. We expect that our general and administrative expenses will continue to increase to support our growth and requirements as a public company.

For the six months ended June 30, 2001, we recorded amortization of deferred compensation of approximately $2.3 million, compared to $1.8 million for the six months ended June 30, 2000.

Interest income increased $2.8 million to $3.4 million for the six months ended June 30, 2001 from $623,000 for the same period last year, due to higher average cash balances primarily related to our Initial Public Offering in July 2000 through which we raised gross cash proceeds of $124.2 million.

Interest expense decreased $47,000 to $71,000 for the six months ended June 30, 2001 from $118,000 for the same period last year. This decrease was due to a convertible note to a related party that was converted into common stock in July of 2000.

Other income increased $169,000 to $195,000 for the six months ended June 30, 2001 from $26,000 for the same period last year. This increase was due primarily to the rental income we earned in 2001 related to a tenant's lease we assumed when we acquired the 6138-6150 facility in January 2001.

At June 30, 2001, we had an accumulated deficit of $22.8 million. Our accumulated deficit is the result of expenses incurred in connection with our research and development activities and general and administrative expenses. To date, we have funded our operations primarily through public and private equity financings and to a lesser extent, through funding from our collaborators.

As of June 30, 2001, we had $222.9 million in cash and cash equivalents compared to $144.4 million in cash and cash equivalents as of December 31, 2000. The increase of $78.5 million is primarily attributable to net proceeds of $103.5 million from our follow-on offering that was completed in June 2001 and cash provided by operations of $1.7 million. This increase was partially offset by our acquisition of Bunsen Rush for $15.0 million in cash in February 2001, the purchase of our facility for $5.4 million in cash in January 2001, lab and equipment purchases totaling $4.3 million and our payment of $2.0 million in connection with our letter of intent with Axiom in April 2001.

Net cash provided by operating activities was approximately $1.7 million during the six months ended June 30, 2001 compared to net cash used in operating activities of approximately $3.6 million during the same period last year. The primary source of cash in the first six months of 2001 was related to non-cash expenses, including amortization of deferred compensation and amortization of acquired technology and other intangibles, which resulted in positive cash flows from operations despite the net loss, and changes in operating assets and liabilities. The primary use of cash in the first six months of 2000 was to fund our net losses for the period and changes in operating assets and liabilities.

Net cash used in investing activities was approximately $26.5 million during the six months ended June 30, 2001 compared with approximately $427,000 during the same period last year. Net cash used in investing activities in first six months of 2001 was primarily the result of the acquisition of Bunsen Rush, our facility purchase, the acquisition of laboratory and computer equipment, leasehold improvements and furniture and fixtures and our payment to Axiom. Net cash used in investing activities in the first six months of 2000 was primarily the result of the acquisition of laboratory and computer equipment, leasehold improvements and furniture and fixtures.

Net cash provided by financing activities was approximately $103.3 million during the six months ended June 30, 2001 compared with approximately $30.6 million during the same period last year. Net cash provided by financing activities for the first six months of 2001 was primarily attributable to proceeds received from the issuance of our common stock from our follow-on offering that was completed in June 2001, partially offset by principal payments on our capital leases. The net cash provided by financing activities for the same period last year was primarily from proceeds received from the issuance of our preferred and common stock.

We lease a corporate and research and development facility under a lease which expires on April 31, 2013. The lease provides us with options to extend for two additional five-year periods. We have also entered into capital lease agreements for various lab and office equipment. The terms of these capital lease agreements range from 48 to 60 months. At December 31, 2000 current total minimum annual payments under these capital leases were approximately $614,000 in 2001, $614,000 in 2002, $480,000 in 2003 and $45,000 in 2004.

In January 2001, we purchased a facility we were previously leasing as well as the adjoining building at 6138-6150 Nancy Ridge Drive in San Diego for cash of $5.4 million. Of the 52,000 square foot facility, 26,000 square feet is leased to a tenant until August 2001. In June 2001, we entered into a letter of intent to purchase property located at 6154 Nancy Ridge Drive for approximately $5.1 million. The building located on the property totals approximately 48,000 square feet of space suitable for office and laboratory expansion. We intend to complete this purchase by August 2001 and expect to occupy the building in 2002.

In February 2001, the Company, through our wholly-owned subsidiary BRL Screening, Inc., acquired all of the outstanding capital stock of Bunsen Rush, a privately-held research-based company, for cash of $15.0 million.

In April 2001, we entered into a binding letter of intent with Axiom Biotechnologies, Inc. Under the terms of the letter of intent, we will identify the location and expression of GPCRs contained in Axiom's human cell lines. In addition, we have paid $2.0 million to Axiom in connection with the letter of intent which provides that we will purchase approximately 570,000 shares of Axiom's preferred stock.

In June 2001, we completed a follow-on offering in which we sold 4,000,000 shares of common stock at $27.50 per share for net proceeds of approximately $103.5 million, net of underwriting discounts, commissions and offering expenses. In the same month the underwriters exercised an over-allotment option to purchase an additional 750,000 shares resulting in net proceeds to the Company of approximately $19.5 million. The net proceeds from the over-allotment were received by the Company on July 2, 2001.

Our ability to achieve profitability will be dependent upon, among other things, obtaining additional strategic alliances as well as establishing additional collaborative or licensing arrangements.

Based on the research collaborations we already have in place and our current internal business plan, we expect to hire an additional 30 to 50 employees, primarily scientists, by the end of 2001. While we believe that our current capital resources and anticipated cash flows from collaborations will be sufficient to meet our capital requirements for at least the next two years, we cannot assure you that we will not require additional financing before such time. Our funding requirements may change at any time due to technological advances or competition from other companies. Our future capital requirements will also depend on numerous other factors, including scientific progress in our research and development programs, additional personnel costs, progress in pre-clinical testing, the time and cost related to proposed regulatory approvals, if any, and the costs of filing and prosecution of patent applications and enforcing patent claims. We cannot assure you that adequate funding will be available to us or, if available, that such funding will be available on acceptable terms. Any shortfall in funding could result in the curtailment of our research and development efforts.

As of December 31, 2000, we had approximately $12.2 million of net operating loss carryforwards and $1.6 million of research and development tax credit carryforwards for federal income tax purposes. These carryforwards expire on various dates beginning in 2012. These amounts reflect different treatment of expenses for tax reporting than are used for financial reporting. United States tax law contains provisions that may limit our ability to use net operating loss and tax credit carryforwards in any year, or if there has been a significant ownership change. Any future significant ownership change may limit the use of our net operating loss and tax credit carryforwards.

Our exposure to market risk for changes in interest rates relates primarily to our cash equivalents and short-term investments. We do not use derivative financial instruments in our investment portfolio. Our cash and investment policy emphasizes liquidity and preservation of principal over other portfolio considerations. We select investments that maximize interest income to the extent possible within these guidelines. If market interest rates were to decrease by 1% from June 30, 2001, we would expect future interest income from our portfolio to decline by less than $2.2 million over the next 12 months. The modeling technique used measures the change in fair values arising from an immediate hypothetical shift in market interest rates and assumes ending fair values include principal plus earned interest.

On July 28, 2000 we completed our initial public offering of 6,000,000 shares of our common stock and on August 10, 2000 the underwriters exercised an over-allotment option for an additional 900,000 shares of our common stock. The shares of common stock sold in the offering were registered under the Securities Act of 1933 in a Registration Statement on Form S-1, as amended (No. 333-35944). The Securities and Exchange Commission declared the Registration Statement effective on July 27, 2000.

Our total net proceeds from the initial public offering were approximately $113.9 million. Of the net proceeds, through June 30, 2001, we have used approximately $5.4 million to acquire facilities at 6138-6150 Nancy Ridge Drive in San Diego, California, $15.0 million to acquire all of the outstanding stock of Bunsen Rush, $2.0 million in connection with the terms of our letter of intent with Axiom and $4.3 million for lab, equipment and furniture purchases and leasehold improvements. The balance of the net proceeds remains in working capital, held as temporary investments in short-term money funds.

The annual meeting of the stockholders of Arena Pharmaceuticals, Inc. was held on May 8, 2001 for the purpose of (i) electing six (6) Directors to hold office until the next annual meeting of stockholders, (ii) ratifying the appointment of independent auditors, and (iii) voting on one (1) other proposal described below. Proxies for the meeting were solicited pursuant to Section 14(a) of the Securities Exchange Act of 1934 and there was no solicitation in opposition to management's Director nominees. All of the management's Director nominees as listed in the proxy statement dated March 29, 2001 (the "Proxy Statement") were elected. The votes cast by proxy or in person with respect to the election of Directors, as determined by the final report of the inspectors are set forth below. There were no broker non-votes with respect to any Director nominee.

Director Nominee	"FOR"	"WITHHELD"
Jack Lief	13,023,857	423,600
Dominic P. Behan, Ph.D.	13,445,302	2,155
Derek T. Chalmers, Ph.D.	13,445,302	2,155
John P. McAlister, III, Ph.D.	13,445,302	2,155
Michael Steinmetz, Ph.D.	13,442,802	4,655
Stephan Ryser, Ph.D.	13,445,302	2,155

Stockholders ratified the selection of Ernst & Young LLP as the Company's independent auditors for the fiscal year ending December 31, 2001. The votes for the ratification of the selection of the independent auditors were as follows:

"FOR"		"AGAINST"		"ABSTAIN"		"BROKER NON-VOTES"
13,428,015		18,090		1,352		0

Stockholders also approved the 2001 Arena Employee Stock Purchase Plan with 1,000,000 shares of Common Stock reserved for issuance thereunder described in the Proxy Statement. The votes for the approval of said Plan were as follows:

"FOR"		"AGAINST"		"ABSTAIN"		"BROKER NON-VOTES"
13,374,168		68,014		5,275		0

On April 30, 2001, the Company filed a current report on Form 8-K under item 5 announcing that on April 25, 2001 the Company and Axiom Biotechnologies, Inc., a privately-held California corporation, had signed a Binding Letter of Intent & Memorarandum of Agreement ("Agreement") for the purchase of $2,000,000 of Preferred Stock of Axiom. In addition, the Agreement provides for the parties to enter into a collaborative research program involving Axiom's proprietary RHASE™ Technology and Human Cell Bank.

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

		PAGE NO.
	PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Condensed Consolidated Balance Sheets—June 30, 2001 (unaudited) and December 31, 2000	3
	Condensed Consolidated Statements of Operations—Three and Six Month Periods Ended June 30, 2001 and 2000 (unaudited)	4
	Condensed Consolidated Statements of Cash Flows—Six Month Periods Ended June 30, 2001 and 2000 (unaudited)	5
	Notes to Condensed Unaudited Consolidated Financial Statements	6
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	8
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	14
	PART II. OTHER INFORMATION	15
Item 2.	Changes in Securities and Use of Proceeds	15
Item 4.	Submission of Matters to a Vote of Security Holders	15
Item 6.	Exhibits and Reports on Form 8-K	16
Signatures		17

			June 30, 2001			December 31, 2000
			(Unaudited)
ASSETS
Current assets:
	Cash and cash equivalents		$	222,927,441		$	144,413,176
	Proceeds due from over-allotment exercise			19,545,000			—
	Accounts receivable			2,581,250			2,116,146
	Prepaid expenses			1,994,988			1,685,122

		Total current assets		247,048,679			148,214,444
Property and equipment, net				13,248,698			4,265,260
Acquired technology and other intangibles, net				14,865,702			—
Deposits and restricted cash				88,016			88,016
Other assets				2,020,601			144,209

Total assets			$	277,271,696		$	152,711,929

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
	Accounts payable and accrued expenses		$	1,865,331		$	915,540
	Current portion of deferred revenues			640,863			220,000
	Current portion of obligations under capital leases			506,704			480,538

		Total current liabilities		3,012,898			1,616,078
Deferred revenues, less current portion				508,831			485,000
Capital lease obligations, less current portion				703,390			960,517
Deferred rent payable				864,667			866,009
Stockholders' equity:
	Common stock			2,680			2,268
	Common stock subscribed			19,545,000			—
	Additional paid-in capital			281,240,425			177,373,030
	Deferred compensation			(5,854,506	)		(7,899,970	)
	Accumulated deficit			(22,751,689	)		(20,691,003	)

Total stockholders' equity				272,181,910			148,784,325

Total liabilities and stockholders' equity			$	277,271,696		$	152,711,929

		Three months ended June 30,						Six months ended June 30,
		2001			2000			2001			2000
Revenues
	Total revenues	$	3,330,255		$	1,289,271		$	8,722,590		$	1,289,271
Operating expenses
Research and development			5,241,523			2,681,629			9,144,864			5,080,987
General and administrative			1,331,573			495,672			2,357,556			919,500
Amortization of deferred compensation			1,072,731			1,419,565			2,341,397			1,829,044
Amortization of acquired technology and other intangibles			384,249			—			512,332			—

	Total operating expenses		8,030,076			4,596,866			14,356,149			7,829,531
Interest income			1,486,322			465,939			3,448,065			623,400
Interest expense			(30,478	)		(58,056	)		(70,737	)		(117,635	)
Other income			98,297			13,630			195,545			26,213

Net loss			(3,145,680	)		(2,886,082	)		(2,060,686	)		(6,008,282	)
Non-cash preferred stock charge			—			(8,203,505	)		—			(22,391,068	)

Net loss applicable to common stockholders		$	(3,145,680	)	$	(11,089,587	)	$	(2,060,686	)	$	(28,399,350	)

Net loss per share, basic and diluted		$	(0.14	)	$	(8.47	)	$	(0.09	)	$	(23.70	)

Shares used in calculating net loss per share, basic and diluted			22,819,360			1,309,968			22,556,573			1,198,238

			Six months ended June 30,
			2001			2000
Operating Activities
Net loss			$	(2,060,686	)	$	(6,008,282	)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
	Depreciation and amortization			668,407			348,722
	Amortization of acquired technology and other intangibles			512,332			—
	Amortization of deferred compensation			2,341,397			1,829,044
	Interest accrued on note payable to related party			—			35,863
	Deferred rent			(1,342	)		22,638
	Deferred revenues			14,659			973,854
	Deferred financing costs			—			(768,309	)
	Changes in operating assets and liabilities:
		Accounts receivable		(465,104	)		—
		Prepaid expenses		(309,866	)		(102,436	)
		Accounts payable and accrued expenses		1,001,791			72,772

Net cash provided by (used in) operating activities				1,701,588			(3,596,134	)
Investing Activities
	Acquisition of Bunsen Rush			(15,000,000	)		—
	Purchases of land, property and equipment			(9,651,845	)		(517,838	)
	Deposits, restricted cash and other assets			(1,876,392	)		90,882

Net cash used in investing activities				(26,528,237	)		(426,956	)
Financing Activities
	Advances under capital lease obligations			—			377,015
	Principal payments under capital lease obligations			(230,961	)		(300,033	)
	Proceeds from warrants exercised			—			69,000
	Proceeds from issuance of common stock			103,571,875			352,279
	Proceeds from issuance of redeemable preferred stock			—			30,065,064

Net cash provided by financing activities				103,340,914			30,563,325

Net increase in cash and cash equivalents				78,514,265			26,540,235
Cash and cash equivalents at beginning of period				144,413,176			5,401,508

Cash and cash equivalents at end of period			$	222,927,441		$	31,941,743



		10.19*		Agreement, executed June 29, 2001 by and between Arena Pharmaceuticals, Inc. and TaiGen Biotechnology Co., Ltd.
		10.20*		Agreement, effective June 15, 2001 by and between Imperial Chemical Industries PLC and Arena Pharmaceuticals, Inc.

	ARENA PHARMACEUTICALS, INC.
Dated: August 10, 2001	By:	/s/ JACK LIEF Name: Jack Lief Title: President and Chief Executive Officer
	By:	/s/ ROBERT HOFFMAN Name: Robert Hoffman Title: Vice President, Finance, Chief Accounting Officer