BIOSITE DIAGNOSTICS INC
10-Q, 1999-11-02
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q

(Mark One)

/X/  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

For the quarterly period ended September 30, 1999

                                       OR

/ /  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934


For the transition period from        to

                        Commission file number 000-21873

                        BIOSITE DIAGNOSTICS INCORPORATED
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

              Delaware                                  33-0288606
     [State or other jurisdiction         [I.R.S. Employer Identification No.]
    of incorporation or organization]
         11030 Roselle Street
        San Diego, California                              92121
[Address of principal executive offices]                 [Zip Code]

       Registrant's telephone number, including area code: (619) 455-4808

        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. Yes X  No
                                             ---    ---

    The number of shares of the Registrant's Common Stock, $0.01 par value,
                 outstanding at October 25, 1999 was 13,071,737

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<PAGE>

                        BIOSITE DIAGNOSTICS INCORPORATED
                                    FORM 10-Q

                                      INDEX
<TABLE>
<CAPTION>
                                                                                                                 PAGE
<S>                                                                                                              <C>
PART I.  FINANCIAL INFORMATION....................................................................................1

ITEM 1.  FINANCIAL STATEMENTS.....................................................................................1
   CONDENSED BALANCE SHEETS.......................................................................................1
   CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED).................................................................2
   CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED).................................................................3
   NOTES TO CONDENSED FINANCIAL STATEMENTS (UNAUDITED)............................................................4

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.....................6

ITEM 2A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK..............................................10

PART II.  OTHER INFORMATION......................................................................................19

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K........................................................................19

SIGNATURES.......................................................................................................20

</TABLE>

<PAGE>

PART I.  FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

                        BIOSITE DIAGNOSTICS INCORPORATED

                            CONDENSED BALANCE SHEETS
<TABLE>
<CAPTION>
                                                                              SEPTEMBER 30,       DECEMBER 31,
                                                                                 1999                1998
                                                                              -------------       ------------
                                                                               (Unaudited)          (Note)
<S>                                                                           <C>                  <C>
Assets
Current assets:
  Cash and cash equivalents                                                   $    2,022,400      $     762,337
  Marketable securities, available-for-sale                                       28,317,249         33,466,841
  Accounts receivable                                                              6,863,351          6,573,735
  Inventories                                                                      5,604,406          4,364,367
  Other current assets                                                             3,144,251          3,133,960
                                                                             ---------------    ---------------
        Total current assets                                                      45,951,657         48,301,240
Property, equipment and leasehold improvements,  net                               9,286,415          7,313,673
Patents and license rights, net                                                    7,726,992          7,203,433
Other assets                                                                       2,671,450          2,990,765
                                                                             ---------------    ---------------
                                                                              $   65,636,514      $  65,809,111
                                                                             ---------------    ---------------
                                                                             ---------------    ---------------
Liabilities and stockholders' equity
Current liabilities:
  Accounts payable                                                            $    1,704,437      $   1,503,354
  Accrued salaries and other                                                       3,241,117          2,699,663
  Accrued costs for defense of patent matters                                              -          1,248,191
  Current portion of long-term obligations                                         1,781,730          1,636,265
                                                                             ---------------    ---------------
        Total current liabilities                                                  6,727,284          7,087,473
Long-term obligations                                                              3,915,197          4,038,444
Commitments and contingencies
Stockholders' equity:
  Preferred stock, $.01 par value, 5,000,000 shares authorized, none
   issued and outstanding at September 30, 1999 and December 31, 1998                      -                  -
  Common stock, $.01 par value, 25,000,000 shares authorized; 13,065,113
   and 12,926,706 shares issued and outstanding at September 30, 1999 and
   December 31, 1998, respectively                                                   130,651            129,267
  Additional paid-in capital                                                      54,702,214         54,250,324
  Unrealized net gain (loss) on marketable securities, net of related
    tax effect                                                                       (69,737)            35,266
  Deferred compensation                                                             (125,758)          (207,845)
  Retained Earnings                                                                  356,663            476,182
                                                                             ---------------    ---------------
        Total stockholders' equity                                                54,994,033         54,683,194
                                                                             ---------------    ---------------
                                                                              $   65,636,514      $  65,809,111
                                                                             ---------------    ---------------
                                                                             ---------------    ---------------
</TABLE>

Note:    The balance sheet at December 31, 1998 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.

See accompanying notes.


                                      -1-
<PAGE>

                        BIOSITE DIAGNOSTICS INCORPORATED

                 CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED)

<TABLE>
<CAPTION>
                                                             THREE MONTHS ENDED                  NINE MONTHS ENDED
                                                                SEPTEMBER 30,                      SEPTEMBER 30,
                                                             1999              1998             1999              1998
                                                       ---------------- ---------------- ---------------- ----------------
<S>                                                     <C>                <C>             <C>               <C>
        Net sales                                       $  11,316,525      $  8,752,524    $  31,357,825     $  25,347,261
        Cost of sales                                       3,179,876         3,037,921       10,184,417         7,135,167
                                                        -------------      ------------    -------------     -------------
        Gross profit                                        8,136,649         5,714,603       21,173,408        18,212,094

        Operating Expenses:
           Selling, general and administrative              4,031,770         3,750,436       13,269,320        11,300,650
           Research and development                         3,417,318         2,895,744       10,059,351         8,834,055
           Defense of patent matters                                -         1,334,957                -         3,337,788
                                                        -------------      ------------    -------------     -------------
                                                            7,449,088         7,981,137       23,328,671        23,472,493
                                                        -------------      ------------    -------------     -------------

        Operating income (loss)                               687,561        (2,266,534)      (2,155,263)       (5,260,399)

        Other income:
           Interest and other income                          406,454           575,506        1,346,744         1,835,215
           Contract revenue                                   300,000         1,909,805          610,000         2,609,805
                                                        -------------      ------------    -------------     -------------

        Income (loss) before benefit (provision)
           for income taxes                                 1,394,015           218,777         (198,519)         (815,379)
        Benefit (provision) for income taxes                 (554,000)          236,000           79,000           396,000
                                                        -------------      ------------    -------------     -------------

        Net income (loss)                               $     840,015      $    454,777    $    (119,519)    $    (419,379)
                                                        -------------      ------------    -------------     -------------
                                                        -------------      ------------    -------------     -------------


        Net income (loss) per share
          - Basic                                       $       0.06       $      0.04     $       (0.01)    $       (0.03)
                                                        -------------      ------------    -------------     -------------
                                                        -------------      ------------    -------------     -------------
          - Diluted                                     $       0.06       $      0.03     $       (0.01)    $       (0.03)
                                                        -------------      ------------    -------------     -------------
                                                        -------------      ------------    -------------     -------------


        Shares used in calculating per share amounts
          - Basic                                          13,056,000        12,986,000       13,014,000        12,944,000
                                                        -------------      ------------    -------------     -------------
                                                        -------------      ------------    -------------     -------------
          - Diluted                                        13,593,000        13,514,000       13,014,000        12,944,000
                                                        -------------      ------------    -------------     -------------
                                                        -------------      ------------    -------------     -------------
</TABLE>

          See accompanying notes.

                                      -2-
<PAGE>

                        BIOSITE DIAGNOSTICS INCORPORATED

                 CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED)
<TABLE>
<CAPTION>
                                                                          NINE MONTHS ENDED SEPTEMBER 30,
                                                                         --------------------------------
                                                                              1999               1998
                                                                         -------------       ------------
<S>                                                                      <C>                 <C>
OPERATING ACTIVITIES
Net cash provided by operating activities                                $   1,648,667       $  2,368,619

INVESTING ACTIVITIES
Proceeds from sales and maturities of marketable securities                 21,240,345         26,272,742
Purchase of marketable securities                                          (16,265,758)       (25,086,428)
Purchase of property, equipment and leasehold improvements                  (3,776,217)        (2,489,026)
Patents, license rights, deposits and other assets                          (2,062,466)        (2,735,306)
                                                                         -------------       ------------
Net cash used in investing activities                                         (864,096)        (4,038,018)

FINANCING ACTIVITIES
Proceeds from issuance of financing obligations                              1,342,520          1,391,112
Principal payments under financing obligations                              (1,320,302)        (1,049,996)
Proceeds from issuance of convertible debenture                                      -            500,000
Repurchase and retirement of common stock                                     (358,641)          (478,125)
Proceeds from issuance of common stock, net                                    811,915            485,066
                                                                         -------------       ------------
Net cash provided by financing activities                                      475,492            848,057
                                                                         -------------       ------------

Increase (decrease) in cash and cash equivalents                             1,260,063           (821,342)

Cash and cash equivalents at beginning of period                               762,337          2,330,274
                                                                         -------------       ------------
Cash and cash equivalents at end of period                               $   2,022,400       $  1,508,932
                                                                         -------------       ------------
                                                                         -------------       ------------
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
  Interest paid                                                          $     333,217       $    320,008
                                                                         -------------       ------------
                                                                         -------------       ------------
  Income taxes  paid                                                     $       2,744       $      4,800
                                                                         -------------       ------------
                                                                         -------------       ------------

SUPPLEMENTAL SCHEDULE OF NON-CASH INVESTING
AND FINANCING ACTIVITIES:
  Conversion of convertible debenture into common stock                  $           -       $    499,992
                                                                         -------------       ------------
                                                                         -------------       ------------
</TABLE>


      See accompanying notes.

                                      -3-
<PAGE>

                        BIOSITE DIAGNOSTICS INCORPORATED

               NOTES TO CONDENSED FINANCIAL STATEMENTS (UNAUDITED)

1.  BASIS OF PRESENTATION

    The accompanying unaudited condensed financial statements have been prepared
in accordance with both generally accepted accounting principles for interim
financial information, and 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. The accompanying financial statements reflect all
adjustments (consisting of normal recurring accruals) which are, in the opinion
of management, considered necessary for a fair presentation of the results for
the interim periods presented. Interim results are not necessarily indicative of
results for a full year. The Company has experienced significant quarterly
fluctuations in operating results and it expects that these fluctuations in
sales, expenses and net income or losses may continue.

    The financial statements and related disclosures have been prepared with the
presumption that users of the interim financial information have read or have
access to the audited financial statements for the preceding fiscal year.
Accordingly, these financial statements should be read in conjunction with the
audited financial statements and the related notes thereto contained in the
Company's Annual Report on Form 10-K for the year ended December 31, 1998.

2.  EARNINGS PER SHARE

    Earnings per Share ("EPS") is computed in accordance with Statement of
Financial Accounting Standards No. 128, Earnings per Share ("FAS 128"). FAS 128
requires dual presentation of basic and diluted earnings per share. Basic EPS
includes no dilution and is computed by dividing net income (loss) by the
weighted average number of common shares outstanding for the period. Diluted EPS
reflects the potential dilution of securities that could share in the earnings
of the Company, such as common stock equivalents which may be issuable upon
exercise of outstanding common stock options. The dilutive effects of common
stock equivalents are not considered in net loss periods.

    Shares used in calculating basic and diluted earnings per share were as
follows:

<TABLE>
<CAPTION>
                                                                    THREE MONTHS ENDED          NINE MONTHS ENDED
                                                                      SEPTEMBER 30,               SEPTEMBER 30,
                                                                --------------------------- ---------------------------
                                                                    1999          1998          1999          1998
<S>                                                                <C>           <C>            <C>           <C>
Weighted average common shares outstanding - Shares used in
   calculating per share amounts - Basic                           13,056        12,986         13,014        12,944
Net effect of dilutive common share equivalents using the
   treasury stock method                                              537           528              -             -
                                                                ------------- ------------- ------------- -------------
Shares used in calculating per share amounts - Diluted             13,593        13,514         13,014        12,944
                                                                ------------- ------------- ------------- -------------
                                                                ------------- ------------- ------------- -------------
</TABLE>

                                      -4-
<PAGE>

3.  BALANCE SHEET INFORMATION

    Inventories consist of the following:

<TABLE>
<CAPTION>
                                          SEPTEMBER 30,    DECEMBER 31,
                                               1999           1998
                                          ------------     ------------
<S>                                       <C>              <C>
Raw materials                             $  2,157,383     $  1,405,176
Work-in-process                              2,786,893        2,938,548
Finished goods                                 660,130           20,643
                                          ------------     ------------
                                          $  5,604,406     $  4,364,367
                                          ------------     ------------
                                          ------------     ------------
</TABLE>

4.  COMPREHENSIVE INCOME

Financial Accounting Standards Board's Statement No. 130, Comprehensive Income,
("FAS 130") establishes rules for the reporting and display of comprehensive
income and its components. FAS 130 requires the change in net unrealized gains
or losses on marketable securities be included in comprehensive income. As
adjusted for this item, comprehensive income is as follows:

<TABLE>
<CAPTION>
                                                      THREE MONTHS ENDED                   NINE MONTHS ENDED
                                                         SEPTEMBER 30,                       SEPTEMBER 30,
                                                -----------------------------------------------------------------------
                                                      1999             1998               1999              1998
                                                -----------------------------------------------------------------------
<S>                                               <C>               <C>               <C>               <C>
Net income (loss)                                 $  840,016        $ 454,777         $ (119,519)       $ (419,379)
Change in unrealized net gain (loss) on
   marketable securities, net of tax                 (10,893)         101,887           (105,003)           92,591
                                                -----------------------------------------------------------------------
Comprehensive income (loss)                       $  829,123        $ 556,664         $ (224,522)       $ (326,788)
                                                -----------------------------------------------------------------------
                                                -----------------------------------------------------------------------
</TABLE>

                                      -5-
<PAGE>

PART I. FINANCIAL INFORMATION

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

    The matters discussed in this Management's Discussion and Analysis of
Financial Condition and Results of Operations contain forward-looking statements
that involve risks and uncertainties, including the timely development,
introduction and acceptance of new products, manufacturing efficiency issues,
dependence on others, the impact of competitive products, third party
reimbursement issues, changing market conditions and the other risks detailed
under "Factors that May Affect Results" and throughout the Company's Annual
Report on Form 10-K for the year ended December 31, 1998. Actual results may
differ materially from those projected. These forward-looking statements
represent the Company's judgment as of the date of the filing of this Form 10-Q
and its Form 10-K, respectively. The Company disclaims any intent or obligation
to update these forward-looking statements.

OVERVIEW

    Biosite Diagnostics Incorporated (the "Company") was established in 1988.
The Company has been primarily involved in the research, development,
manufacturing and marketing of rapid diagnostic tests. In 1992, the Company
began commercial sales of the Company's primary product, the Triage Panel for
Drugs of Abuse ("Triage DOA Panel"). In 1998, the Company began selling three
additional products, the Triage C. DIFFICILE Panel, the Triage Parasite Panel
and the Triage Cardiac System. The Company markets the products worldwide
primarily through distributors supported by the Company's direct sales force.
The Company's principal markets are hospital laboratories and emergency
departments. In addition to focusing its attention on commercial activities
associated with these products, the Company continues to invest in the research
and development of additional rapid tests designed to aid in the diagnosis of
several critical diseases or conditions, including congestive heart failure and
certain bacterial infections. The Company is also developing a diagnostic test
to aid in the dosing of immunosuppressant drugs.

    In March 1999, the Company introduced its Biosite Discovery program, a
collaborative research and diagnostics development program focused on the
identification of new protein markers for acute diseases. The Company will seek
to use its expertise in antibody development to help pharmaceutical and
biotechnology partners accelerate their research programs. In return, Biosite
intends to obtain diagnostic rights to the proteins under study. Biosite will
utilize its proprietary Omniclonal(TM) antibody development technology to
develop high affinity antibodies for the characterization and validation of
protein targets. Initially, Biosite will focus on disease target markers in four
core areas: cardiovascular, cerebrovascular, infectious disease and cancer. If
the diagnostic utility of a marker is established, it will then be assessed for
commercialization potential, with high value markers being added to Biosite's
product development pipeline. The Company executed collaborative agreements
under the Biosite Discovery program with Scios Inc. in the cardiovascular area
and with Corixa Corporation in the areas of cancer, infectious and autoimmune
diseases.

    The Company achieved operating profitability during the third quarter.
However, the Company incurred an operating loss during the prior seven quarters.
The Company may not be able to maintain operating profitability on a quarterly
or annual basis in the future. The Company anticipates that its results of
operations may fluctuate for the foreseeable future due to several factors,
including whether and when new products are successfully developed and
introduced by the Company, market acceptance of current or new products,
manufacturing scale-up issues, manufacturing inefficiencies, regulatory delays,
product recalls, shipment problems, seasonal customer demand, the timing or
cancellation of significant orders, changes in reimbursement policies,
competitive pressures on average selling prices and changes in the mix of
products sold.

    Because the Company is continuing to increase its operating expenses,
primarily for personnel and activities supporting newly-introduced products and
new product development, the Company's operating results would be adversely
affected if its net sales or gross profit did not correspondingly increase or if
its product development efforts were unsuccessful or are subject to delays. The
Company's limited operating history makes accurate prediction of future
operating results difficult or impossible. The Company may not sustain revenue
growth or maintain profitability on a quarterly or annual basis and its
operating results may not be consistent with predictions made by securities
analysts.

RESULTS OF OPERATIONS

The following table sets forth certain operating data as a percentage of net
sales:

                                      -6-
<PAGE>

<TABLE>
<CAPTION>
                                                          THREE MONTHS ENDED         NINE MONTHS ENDED
                                                            SEPTEMBER 30,               SEPTEMBER 30,
                                                          1999          1998          1999          1998
                                                         ------        ------        ------        ------
<S>                                                       <C>           <C>           <C>           <C>
        Net sales.................................         100%          100%          100%          100%
        Cost of sales.............................          28            35            32            28
                                                         -----         -----         -----         -----
        Gross profit..............................          72            65            68            72

        Operating Expenses:
         Selling, general and administrative......          36            43            42            45
         Research and development.................          30            33            32            35
         Defense of patent matters................          --            15            --            13
                                                         -----         -----         -----         -----
        Total operating expenses..................          66            91            74            93

        Income (loss) from operations.............           6           (26)           (7)          (21)
        Interest and other income, net............           6            28             6            18
                                                         -----         -----         -----         -----
        Income (loss) before benefit (provision)
          for income taxes........................          12             2            (1)           (3)
        Benefit (provision) for income taxes......          (5)            3             1             1
                                                         -----         -----         -----         -----
        Net income (loss).........................           7%            5%           (0)%          (2)%
                                                         -----         -----         -----         -----
                                                         -----         -----         -----         -----
</TABLE>

    NET SALES. Net sales for the three and nine months ended September 30, 1999
were $11.3 million and $31.4 million, respectively, representing increases of
29% and 24%, respectively, compared to the same periods of 1998. The increases
in net sales were primarily attributable to the introduction of new products.
The Triage C. DIFFICILE Panel and Triage Parasite Panel were launched in March
1998 and October 1998, respectively. The Triage Cardiac System was introduced in
May 1998. New product sales for the three and nine months ended September 30,
1999 were approximately $2.4 million and $6.2 million, respectively, as compared
to $578,000 and $1.0 million, respectively, for the same periods of 1998. Net
sales of the Triage DOA Panel for the third quarter and first nine months of
1999 were 9% and 3% higher than net sales of the product for the same periods in
1998. The Company believes that the growth in sales of the Triage DOA Panel
products has slowed and may begin to decline as the available U.S. market
becomes saturated and competitive pressures become more prominent in a maturing
market.

    GROSS PROFIT. Gross profit for the three and nine months ended September 30,
1999 was $8.1 million and $21.2 million, respectively, representing increases of
42% and 16% respectively, over the comparable periods of 1998. The overall gross
margin increased to 72% for the third quarter and decreased to 68% for the first
nine months of 1999 from 65% and 72% for the same periods in 1998. Gross margins
for the first nine months decreased primarily as a result of the introduction of
the new products, which experienced lower gross margins than the Triage DOA
Panel. Also, during the first quarter of 1999, the Company experienced
significant inefficiencies related to the production of the Triage Cardiac
System, resulting in negative gross profits related to that product. Gross
margins increased during the third quarter of 1999 as compared to the same
period of 1998, primarily as a result of efficiencies achieved in our
manufacturing operations. Also, as a result of efficiencies achieved, the
Company was able to utilize some of its manufacturing resources for new product
scale-up and validation activities related to the Triage BNP and Triage LBP
systems, two products under development. The costs of new product scale-up and
validation activities were charged to research and development expenses, which
also contributed to higher gross margins during the third quarter. The Company's
new products are expected to continue to realize lower or negative gross margins
during the early stages of their commercialization as incremental manufacturing
costs are spread over smaller sales volumes and efficiency issues are addressed.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES. Selling, general and
administrative expenses for the three and nine months ended September 30, 1999
were $4.0 million and $13.3 million, respectively, representing increases of 8%
and 17%, respectively, from the comparable periods of 1998. Increases in
expenses were primarily associated with additional marketing activities relating
to new products, the expanded sales activities related to the Company's broader
product lines and the increased administrative costs to support the Company's
expanded operations and business development activities. Additionally, expenses
for the first nine months of 1999 included administrative costs associated with
the reorganization of the Company's manufacturing operations totaling
approximately $300,000 and approximately $425,000 related to a business
development opportunity that the Company decided to forego. The Company expects
selling, general and administrative costs in 1999 to be significantly higher
than in 1998, as the Company continues to expand its overall operations,
including sales and marketing activities for the Company's new products,
business development activities and administrative support functions. The timing
of such increased expenditures and their magnitude are primarily dependent on
the commercial success and sales growth of the Company's new products, the
progress of business development activities, and domestic and international
marketing and distribution strategies.

    RESEARCH AND DEVELOPMENT EXPENSES. Research and development expenses for the
three months and nine months ended September 30, 1999 were $3.4 million and
$10.1 million, respectively, representing increases of 18% and 14%,


                                      -7-
<PAGE>

respectively, from the comparable periods of 1998. During the third quarter of
1999, the Company's research and development resources were focused primarily on
the development, clinical studies, manufacturing scale-up and validation of the
Triage BNP System and Triage LBP System, development of the Triage Enteric
Panel, potential improvements to the Triage Cardiac System and Triage Micro
Panel products and research activities associated with the Biosite Discovery
Program. Significant activities in the third quarter of 1998 related to
manufacturing scale-up activities for the Triage Cardiac System and Triage C.
DIFFICILE Panel. The Company expects that its research and development expenses
will increase in 1999, as compared to 1998 levels. The increased expenditures
are expected to primarily relate to pre-clinical and clinical studies, product
development efforts, the Biosite Discovery program and manufacturing scale-up
activities. The Company initiated clinical trials for its Triage BNP System and
Triage LBP System in late December 1998. The Triage BNP clinical trials are
expected to be completed in the fourth quarter of 1999 while the Triage LBP
System clinical trials may extend into the first quarter of 2000. The costs
associated with completing the clinical trials are expected to be significant.
These potential products are subject to more complex regulatory approval
requirements than the Company's previous products. The Company also may resume
clinical trials for its NeoralChek System during the fourth quarter of 1999. The
timing of the increased expenditures and their magnitude are primarily dependent
on the progress and success of the research and development and the timing of
potential product launches.

    DEFENSE OF PATENT MATTERS. Legal expenses associated with the Dade Behring
and Spectral litigation totaled $1.3 million and $3.3 million for the third
quarter and first nine months of 1998. In February 1999, a settlement agreement
was executed that resolved all disputes between Spectral Diagnostics and the
Company without a material adverse financial impact to Biosite. In March 1999,
to avoid protracted litigation and continued significant legal defense costs,
the Company and Dade Behring executed a settlement agreement that resolved all
disputes outstanding between the companies. Accordingly, all settlement costs
were known prior to filing the Company's 10-K and therefore were expensed as of
December 31, 1998.

    INTEREST AND OTHER INCOME. Interest and other income decreased 29% and 27%,
respectively, for the three months and nine months ended September 30, 1999 from
the same periods in 1998. The decrease resulted primarily from the lower average
balance of cash and marketable securities during the third quarter and first
nine months of 1999 as compared to the same period in 1998. Contract revenues
recognized during the third quarter of 1999 related to activities associated
with a research and development feasibility study being performed by the
Company. Contract revenue was recognized in the third quarter of 1998 consisted
primarily of $1.3 million from Kyoto Dai-Ichi Kagaku C., Ltd. ("KDK") related to
milestones in the development of the Triage Cardiac System and $400,000 from
Novartis Pharma AG related to the development of the NeoralChek System.

    BENEFIT (PROVISION) FOR INCOME TAXES. For the three months ended September
30, 1999, the Company recorded a provision for income taxes of $554,000 and for
the same period in 1998, the Company recorded a benefit for income taxes of
$236,000. At September 30, 1999, the Company has net deferred tax assets of $4.1
million; however, due to the fact that the Company has incurred pre-tax losses
in 1998 and through the first nine months of 1999, the Company will continue to
evaluate the realizability of its net deferred tax assets. If realization
becomes uncertain, a valuation allowance will be established against previously
recognized deferred tax assets.

LIQUIDITY AND CAPITAL RESOURCES

    The Company has historically financed its operations through revenues from
operations, private and public placements of equity securities, debt and capital
lease financing and interest income earned on the net proceeds from the equity
placements. Since its inception, the Company has raised over $21.7 million in
net cash proceeds from the private placement of equity securities and $1.5
million from the issuance of convertible debentures. In February 1997, the
Company raised approximately $29.8 million in net cash proceeds from its initial
public offering of common stock. At September 30, 1999, the Company had cash,
cash equivalents and marketable securities of approximately $30.3 million
compared to $34.2 million at December 31, 1998.

    The decrease in cash, cash equivalents and marketable securities during the
nine months ended September 30, 1999 is largely attributable to the net payment
of $1,050,000 made to Dade Behring as part of the settlement of litigation
between Dade Behring and Biosite in March 1999 and an additional $1.0 million
payment made under a technology licensing arrangement previously entered into.
Cash generated from operating activities totaled $1.6 million for the nine
months ended September 30, 1999 compared to $2.4 million for the nine months
ended September 30, 1998. Significant sources of cash for the nine months ended
September 30, 1999 included the receipt of $5.0 million from the sale of
marketable securities that were not reinvested in other marketable securities
and the receipt of $1.3 million in proceeds from equipment financing. These
proceeds were used to meet cash requirements of the Company during the first
nine months of 1999. Significant uses of cash during the nine months ended
September 30, 1999 included purchases of equipment and leasehold improvements
totaling approximately $3.8 million.


                                      -8-
<PAGE>

     Significant sources of cash for the nine months ended September 30, 1998
included the receipt of $1.4 million in proceeds from equipment financing and
$985,000 in proceeds from the issuance of a convertible debenture and common
stock. Significant uses of cash for the nine months ended September 30, 1998
included the acquisition or licensing of patented technologies and expenditures
for equipment and leasehold improvements totaling $5.2 million.

    The Company's primary short-term needs for capital, which are subject to
change, are for the support of its commercialization efforts related to new
products, expansion of its manufacturing capacity and efficiency for new
products, potential licensing of certain technologies patented by others,
potential procurement and enforcement of patents, potential repurchase of the
Company's common stock and the continued advancement of research and development
efforts. The Company executed agreements to license technologies patented by
others which call for cash payments and future royalties based on product sales
utilizing the licensed technologies. The Company may enter into additional
licensing agreements that may include up-front and annual cash payments and
future royalties based on product sales utilizing the licensed technologies. The
Company has utilized and may continue to utilize credit arrangements with
financial institutions to finance the purchase of capital equipment.
Additionally, the Company may utilize cash generated from operating activities,
if any, to meet its capital requirements.

    The Company is evaluating various alternatives in addressing its future
facilities expansion needs. The alternatives being evaluated include
negotiations with various parties for the leasing of additional facility space
and potentially a new corporate facility to be constructed in San Diego, which
would be adequate for the Company's foreseeable future needs. If a new corporate
facility is constructed to meet future needs, the Company would not anticipate
expanding its operations to the new facility prior to January 2001. Expanding
into a new facility or leasing of additional facility space would be expected to
result in an increase in rent upon occupancy.

    The Company believes that its available cash, cash from operations and funds
from existing credit arrangements will be sufficient to satisfy its funding
needs for at least the next 24 months. Thereafter, if cash generated from
operations is insufficient to satisfy the Company's working capital and capital
expenditure requirements, the Company may be required to sell additional equity
or debt securities or obtain additional credit facilities. Additional capital,
if needed, may not be available on satisfactory terms, if at all. Furthermore,
any additional equity financing may be dilutive to stockholders, and debt
financing, if available, may include restrictive covenants. The Company's future
liquidity and capital funding requirements will depend on numerous factors,
including the extent to which the Company's new products and products under
development are successfully developed, gain market acceptance and become and
remain competitive, the timing and results of clinical studies and regulatory
actions regarding the Company's potential products, the costs and timing of
further expansion of sales, marketing and manufacturing activities, facilities
expansion needs, changes in third party reimbursement policies, and the costs
and timing associated with business development activities, including potential
licensing of certain technologies patented by others. The failure by the Company
to raise capital on acceptable terms, when needed, could have a material adverse
effect on the Company's business, financial condition and results of operations.


                                      -9-
<PAGE>

IMPACT OF YEAR 2000 ("Y2K") ISSUE

    The Company has implemented a plan to ensure its system, software and
facilities infrastructure will function properly with respect to dates in the
year 2000 and thereafter. All key financial, information and operational systems
have been assessed and verified as being compliant. All key suppliers,
distributors, financial institutions and others with whom it does business have
been contacted by the Company to assess their Y2K readiness, and approximately
90% have certified compliance or based upon inquiries as to their plans have
been assessed as being at minimal risk of significant Y2K problems to Biosite.
The remaining 10% have stated that they will be compliant before December 31,
1999. The Company is continuing to communicate with suppliers, distributors,
financial institutions and others and believes that their readiness will not
pose significant operational problems for the Company, nor have a material
adverse effect on the Company's business. To date the Company has expended less
than $35,000 addressing the Y2K Issue and estimates the total cost of the
project to be under $40,000. The Company is also preparing contingency plans as
an extra precaution in case key suppliers have unanticipated Y2K problems in
supplying goods or services. The Company anticipates that it will be in
compliance with Y2K requirements by the end of December 1999.

    The Company assesses that there is minimal risk of a material adverse impact
on the operations of the Company. However, the systems of other companies on
which Biosite's systems rely may not be timely converted and may have an adverse
effect on the Company's operations. The most likely worst case scenario is that
customers would be unable to order products or pay invoices or suppliers would
be unable to manufacture or deliver product. This would result in reduced orders
of products and the inability of the Company to manufacture product.

     The Triage Meter and related software is the only product that the Company
currently sells which needs evaluation for Y2K readiness, as the other products
do not process or store any date and time data. The Triage Meter and related
software has been tested and shown to properly process and store date and time
data between the 20th and 21st centuries, and the years 1999 and 2000. This
processing and storage included calculating, comparing, displaying and recording
sequence operations involving date and time data. Correct processing of the leap
year date and time data has also been demonstrated. The software functions as
intended or expected, regardless of the date.

ITEM 2A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

    The Company is exposed to changes in interest rates, primarily from its
variable-rate long-term debt arrangements and, to a lesser extent, its
investments in certain available-for-sale marketable securities. Under its
current policies, the Company does not use interest rate derivatives instruments
to manage this exposure to interest rate changes. The Company does have the
option to convert its variable-rate long-term debt arrangements to fixed-rate
debt arrangements for a nominal transaction fee. At September 30, 1999, the
Company had variable-rate debt totaling $1.7 million. A hypothetical 1% adverse
move in interest rates along the entire interest rate yield curve would not
materially effect the fair value of the Company's financial instruments that are
exposed to changes in interest rates.

    Additionally, the Company's purchases of Triage Meters from LRE Technology
Partner GmbH ("LRE") are denominated in German Deutsche Marks (DM) and sales of
certain products to some international customers are denominated in the local
currency of customers. The Company has on occasion purchased forward exchange
contracts to manage this exposure to exchange rate changes. As of September 30,
1999, the Company had no outstanding forward exchange contracts. Total
receivables and payables denominated in foreign currencies at September 30, 1999
were not material.


                                      -10-
<PAGE>

FACTORS THAT MAY AFFECT RESULTS

    This report includes forward-looking statements about the Company's business
and results of operations which are subject to risks and uncertainties that
could cause the Company's actual results to vary materially from that indicated
from such forward-looking statements. Factors that could cause or contribute to
such differences include those discussed below, as well as those discussed
elsewhere in the Form 10-Q and in the Company's Annual Report on Form 10-K for
the year ended December 31, 1998. The factors discussed below should be read in
conjunction with the risk factors discussed in the Company's Annual Report on
Form 10-K, which are incorporated by reference.

LIMITED HISTORY OF PROFITABILITY; POTENTIAL QUARTERLY FLUCTUATIONS IN FUTURE
OPERATING RESULTS

    The Company achieved operating profitability in the third quarter. However,
the Company incurred an operating loss during the prior seven quarters. The
Company may not be able to maintin operating profitability on a quarterly or
annual basis in the future. The Company believes that future operating results
will be subject to quarterly fluctuations due to a variety of factors, including
whether and when new products are successfully developed and introduced by the
Company, market acceptance of current or new products, regulatory delays,
product recalls, manufacturing delays or inefficiencies, shipment problems,
seasonal customer demand, the timing of significant orders, changes in
reimbursement policies, competitive pressures on average selling prices, changes
in the mix of products sold and possible defense and resolution of patent
matters.

    Operating results would also be adversely affected by a downturn in the
market for the Company's current and future products, if there are any. Because
the Company is continuing to increase its operating expenses to support its
expanded sales and marketing activities, manufacturing operations and new
product development, the Company's operating results would be adversely affected
if its sales and gross profits did not correspondingly increase or if its
product development efforts are unsuccessful or subject to delays. The Company's
limited operating history makes accurate prediction of future operating results
difficult or impossible. The Company may not sustain revenue growth or sustain
profitability on a quarterly or annual basis and its growth or operating results
may not be consistent with predictions made by securities analysts.

DEPENDENCE ON DEVELOPMENT AND INTRODUCTION OF NEW PRODUCTS FOR REVENUE GROWTH
AND PROFITABILITY

    Except for the Triage DOA Panel, Triage C. DIFFICILE Panel, Triage Parasite
Panel and Triage Cardiac System, all of the Company's products are still under
development and may not be successfully developed or commercialized on a timely
basis, or at all. If the Company is unable, for technological or other reasons,
to complete the development, introduction or scale-up of manufacturing for any
new product or if any new product is not approved for marketing or does not
achieve a significant level of market acceptance, the Company's business,
financial condition and results of operations would be materially and adversely
affected.

    The Company believes that its revenue growth and profitability will
substantially depend upon its ability to complete development of and
successfully introduce these new products. In addition, the successful
development of some of these new products will depend on the development of new
technologies. The Company will be required to undertake time-consuming and
costly development activities and seek regulatory approval for these new
products. The Company may experience difficulties that could delay or prevent
the successful development, introduction and marketing of these new products.
Regulatory clearance or approval of any new products may not be granted by the
U.S. Food and Drug Administration or foreign regulatory authorities on a timely
basis, or at all, and the new products may not be successfully commercialized.
The Company has limited resources to devote to the development of its potential
products and consequently a delay in the development of one product may delay
the development of other products.

    In order to successfully commercialize any new products, the Company will be
required to establish and maintain reliable, cost-efficient, high-volume
manufacturing capacity, a cost-effective sales force and administrative
infrastructure and an effective product distribution system for its products.


                                      -11-
<PAGE>

LIMITED MANUFACTURING EXPERIENCE; POTENTIAL INABILITY TO SCALE-UP MANUFACTURING

    To be successful, the Company must manufacture its current and future
products in compliance with regulatory requirements, in sufficient quantities
and on a timely basis, while maintaining product quality and acceptable
manufacturing costs. The Company has limited experience manufacturing products
other than the Triage DOA Panel products. To achieve the level of production
necessary for commercialization of Biosite's new products and products under
development, the Company will need to scale-up current manufacturing
capabilities. Significant additional work will be required for the scaling-up of
each new Biosite product prior to commercialization, and this work may not be
completed successfully.

    In addition, although the Company expects some of its new products and
products under development to share production attributes with the Company's
existing products, production of these products may require the development of
new manufacturing technologies and expertise. These products may not be able to
be manufactured by the Company or any other party at a cost or in quantities to
make these products commercially viable. If the Company is unable to develop or
contract for manufacturing capabilities on acceptable terms for its products
under development, the Company's ability to conduct pre-clinical and clinical
testing will be adversely affected, resulting in the delay of submission of
products for regulatory clearance or approval and initiation of new development
programs, which would have a material adverse effect on the Company's business,
financial condition and results of operations.

    The Company anticipates making significant expenditures to develop high
volume manufacturing capabilities required for each of its new products and
products currently under development, if the products are successfully
developed. Manufacturing and quality control problems have arisen and may arise
as the Company attempts to scale-up its manufacturing and such scale-up may not
be achieved in a timely manner or at a commercially reasonable cost, or at all.

    The Company's manufacturing facilities and those of its contract
manufacturers are or will be subject to periodic regulatory inspections by the
FDA and other federal and state regulatory agencies and these facilities are
subject to Quality System Regulations ("QSR") requirements of the FDA. The
Company or its contractors may not satisfy such regulatory requirements, and any
failure to do so would have a material adverse effect on the Company's business,
financial condition and results of operations.

DEPENDENCE ON SOLE-SOURCE SUPPLIERS

    Key components and raw materials used in the manufacture of the Triage DOA
Panel, Triage C. DIFFICILE Panel, Triage Parasite Panel and Triage Cardiac
System are currently provided by single-source vendors. Although the Company
believes that alternative sources for such components and raw materials are
available, any supply interruption in a sole-sourced component of raw material
would have a material adverse effect on the Company's ability to manufacture
these products until a new source of supply is qualified and, as a result, would
have a material adverse effect on the Company's business, financial condition
and results of operations. In addition, an uncorrected impurity or supplier's
variation in a raw material, either unknown to the Company or incompatible with
the Company's Triage DOA Panel, Triage C. DIFFICILE Panel, Triage Parasite Panel
and Triage Cardiac System manufacturing processes, could have a material adverse
effect on the Company's ability to manufacture products. The Company has under
development products other than the Triage DOA Panel, Triage C. DIFFICILE Panel,
Triage Parasite Panel and Triage Cardiac System which, if developed, may require
that the Company enter into additional supplier arrangements. The Company may
not be able to enter into additional supplier arrangements on commercially
reasonable terms, or at all. Failure to obtain a supplier for the manufacture of
its future products, if any, would have a material adverse effect on the
Company's business, financial condition and results of operations.

    The Company expects to rely upon LRE for production of the fluorescent meter
to be used in connection with its Triage Meter System platform products,
including the Triage Cardiac System and others currently under development. The
Company's dependence upon LRE for the manufacture of the meter may adversely
affect the Company's profit margins, its ability to develop and manufacture
products on a timely and competitive basis, the timing of market introductions
and subsequent sales of products incorporating the LRE meter.

NEAR-TERM DEPENDENCE OF THE COMPANY ON THE TRIAGE DOA PANEL

To date, sales of the Triage DOA Panel products have accounted for almost all of
the Company's sales. The Company expects its revenue and profitability to
substantially depend on the sale of the Triage DOA Panel products for the
foreseeable future. A significant reduction in demand for the Triage DOA Panel
products would have a material adverse effect on the Company's business,
financial condition and results of operations. The Company believes that growth
in sales of the Triage DOA Panel products is slowing as the available U.S.
market becomes saturated. Competitive pressures


                                      -12-
<PAGE>

could also erode the Company's profit margins for the Triage DOA Panel products.
The Company's continued growth will depend on its ability to successfully
commercialize its new products (the Triage C. DIFFICILE Panel, Triage Parasite
Panel and Triage Cardiac System), develop and commercialize other products, and
to gain additional acceptance of the Triage DOA Panel products in new market
segments, such as the international market segments.

    During 1998, the Company received FDA approval to market the Triage C.
DIFFICILE Panel, Triage Parasite Panel and the Triage Cardiac System and began
selling each of the products in March, October and May, respectively. Sales of
these new products represented less than 20% of net sales during the first three
quarters of 1999.

    The Company may not be able to successfully commercialize new products,
including the Triage C. DIFFICILE Panel, Triage Parasite Panel, and Triage
Cardiac System, and the Company may not be able to maintain or expand its share
of the drug-testing market. Technological change or the development of new or
improved diagnostic technologies could result in the Company's products becoming
obsolete or noncompetitive.

DEPENDENCE ON KEY DISTRIBUTORS; LIMITED DIRECT SALES EXPERIENCE

    The Company relies upon key distributor alliances, such as with Fisher
HealthCare, to distribute the Triage DOA Panel products, Triage C. DIFFICILE
Panel, Triage Parasite Panel and Triage Cardiac System and may rely upon
distributors to distribute products under development. The Triage DOA Panel
products are currently marketed pursuant to exclusive distribution agreements in
the U.S. hospital market segment by Fisher (which accounted for 86% of product
sales in 1998) and internationally by country-specific and regional
distributors. The loss or termination of one or more of these distributors could
have a material adverse effect on the Company's sales unless suitable
alternatives can be arranged.

    If any of the Company's distribution or marketing agreements are terminated
and the Company is unable to enter into alternative agreements or if the Company
elects to distribute new products directly, the Company would have to invest in
additional sales and marketing resources, including additional field sales
personnel, which would significantly increase future selling, general and
administrative expenses. The Company has limited experience in direct sales,
marketing and distribution of its products. The Company's direct sales,
marketing and distribution efforts may not be successful. Further, Biosite may
not be able to enter into new distribution or marketing agreements on
satisfactory terms, or at all. A failure to enter into acceptable distribution
agreements or a failure of the Company to successfully market its products would
have a material and adverse effect on the Company.

INTENSELY COMPETITIVE INDUSTRY; RAPID TECHNOLOGICAL CHANGE

    The market in which the Company competes is intensely competitive. Biosite's
competitors include health care companies that manufacture rapid tests,
laboratory-based tests and analyzers, as well as clinical reference
laboratories. Currently, the majority of diagnostic tests used by physicians and
other health care providers are performed by independent clinical reference
laboratories and hospital-based laboratories. The Company expects that these
laboratories will compete vigorously to maintain their dominance of the testing
market. In order to achieve market acceptance for its products, the Company will
be required to demonstrate that its products provide cost-effective and time
saving alternatives to tests performed by clinical reference laboratories or
traditional hospital-based laboratory procedures. This will require physicians
to change their established means of having such tests performed. The Company's
products may not be able to compete with the testing services provided by
traditional laboratory services.

    In addition, companies with a significant presence in the diagnostic market,
such as Abbott Laboratories, Roche Boehringer Mannheim Corporation, Bayer
Diagnostics, Ortho Clinical Diagnostics, a division of Johnson & Johnson, and
Dade Behring, have developed or are developing diagnostic products that do or
will compete with the Company's products. These competitors have substantially
greater financial, technical, research and other resources and larger, more
established marketing, sales, distribution and service organizations than the
Company. Moreover, these competitors offer broader product lines and have
greater name recognition than the Company, and offer discounts as a competitive
tactic. In addition, several smaller companies are currently making or
developing products that compete with or will compete with those of the Company.
The Company's competitors may succeed in developing or marketing technologies or
products that are more effective or commercially attractive than the Company's
current or future products, or that would render the Company's technologies and
products obsolete. Moreover, the Company may not have the financial resources,
technical expertise or marketing, distribution or support capabilities to
compete successfully in the future. In addition, competitors, many of which have
made substantial investments in competing technologies, may be more effective
than the Company or may prevent, limit or interfere with the Company's ability
to make, use or sell its products either in the United States or in
international markets.


                                      -13-
<PAGE>

UNCERTAINTY RELATING TO THIRD PARTY REIMBURSEMENT AND POTENTIAL COST CONSTRAINTS

    In the United States, health care providers that purchase the Triage DOA
Panel and other diagnostic products, such as hospitals and physicians, generally
rely on third party payors, principally private health insurance plans, federal
Medicare and state Medicaid, to reimburse all or part of the cost of the
procedure. Such third party payors can affect the pricing or the relative
attractiveness of the Company's products by regulating the maximum amount of
reimbursement provided by such payors for testing services. In addition, the
tests performed by public health departments, corporate wellness programs and
other large volume users in the drug screening market are generally not subject
to reimbursement. Further, certain health care providers are moving towards a
managed care system in which such providers contract to provide comprehensive
health care for a fixed cost per patient. The Company is unable to predict what
changes will be made in the reimbursement methods utilized by third party
payors. The Company could be adversely affected by changes in reimbursement
policies of governmental or private health care payors, particularly to the
extent any such changes affect reimbursement for procedures in which the
Company's products are used. Third party payors are increasingly scrutinizing
and challenging the prices charged for medical products and services. Decreases
in reimbursement amounts for tests performed using the Company's products may
decrease amounts physicians and other practitioners are able to charge patients,
which in turn may adversely affect the Company's ability to sell its products on
a profitable basis. Failure by physicians and other users to obtain
reimbursement from third party payors, or changes in government and private
third party payors' policies toward reimbursement of tests utilizing the
Company's products could have a material adverse effect on the Company's
business, financial condition or results of operation. Given the efforts to
control and reduce health care costs in the United States in recent years, there
can be no assurance that currently available levels of reimbursement will
continue to be available in the future for the Company's existing products or
products under development.

    In addition, market acceptance of the Company's products in international
markets is dependent, in part, upon the availability of reimbursement within
prevailing health care payment systems. Reimbursement and health care payment
systems in international markets vary significantly by country, and include both
government sponsored health care and private insurance.

    The Company believes that the overall escalating cost of medical products
and services has led to and will continue to lead to increased pressures on the
health care industry, both foreign and domestic, to reduce the cost of products
and services, including products offered by the Company. Third party
reimbursement and coverage may not be available or adequate in either U.S. or
foreign markets, current reimbursement amounts may be decreased in the future
and future legislation, regulation or reimbursement policies of third-party
payors may adversely affect the demand for the Company's products or its ability
to sell its products on a profitable basis.

UNCERTAINTY OF PATENT AND PROPRIETARY TECHNOLOGY PROTECTION; POTENTIAL INABILITY
TO LICENSE TECHNOLOGY FROM THIRD PARTIES

    The Company's ability to compete effectively will depend in part on its
ability to develop and maintain proprietary aspects of its technology, and to
operate without infringing the proprietary rights of others or to obtain
licenses to such proprietary rights. Biosite has U.S. and foreign issued patents
and is currently prosecuting patent applications in the United States and with
certain foreign patent offices. The Company's pending patent applications may
not result in the issuance of any patents. Additionally, the Company's patent
applications may not have priority over others' applications, or, if issued, the
Company's patents may not offer protection against competitors with similar
technology. Any patents issued to the Company may be challenged, invalidated or
circumvented in the future and the rights created thereunder may not provide a
competitive advantage.

    The Triage DOA Panel, Triage C. DIFFICILE Panel, Triage Parasite Panel,
Triage Cardiac System and products under development may incorporate
technologies that are the subject of patents issued to, and patent applications
filed by, others. The Company has obtained licenses for some technologies and
may negotiate to obtain other licenses for technologies patented by others.
However, the Company may not be able to obtain licenses for technology patented
by others on commercially reasonable terms, or at all. The Company may not be
able to develop alternative approaches if it is unable to obtain licenses and
the Company's current and future licenses may not be adequate for the operation
of it's business. The failure to obtain necessary licenses or to identify and
implement alternative approaches would prevent the Company from commercializing
certain of its products under development and would have a material adverse
effect on the Company's business, financial condition and results of operations.

    Litigation may be necessary to enforce any patents issued to the Company,
to protect trade secrets or know-how owned by the Company or to determine the
enforceability, scope and validity of the proprietary rights of others. The
Company settled a number of patent infringement claims in the last three years.


                                      -14-
<PAGE>

    The Company may become subject to additional patent infringement claims and
litigation or interference proceedings conducted in the U.S. Patent and
Trademark Office ("USPTO") to determine the priority of inventions. The Company
also has received correspondence from other parties calling to the Company's
attention the existence of patents that they believe cover technology which is
or may be incorporated in Biosite's products and products under development.
Some of this correspondence has included offers to negotiate the licensing of
the patented technologies. There can be no assurance that these matters will not
result in litigation to determine the enforceability, scope, and validity of the
patents. Litigation, if initiated, could seek to recover damages as a result of
any sales of the products and to enjoin further sales of such products.

    Litigation that could be brought forth by other parties may result in
material expenses to the Company and significant diversion of effort by the
Company's technical and management personnel, regardless of the outcome. The
outcome of litigation is inherently uncertain and there can be no assurance that
a court would not find the third-party claims valid and that the Company had no
successful defense to such claims. An adverse outcome in litigation or the
failure to obtain a necessary license could subject the Company to significant
liability and could prevent the Company from selling the Triage DOA Panel,
Triage C. DIFFICILE Panel, Triage Parasite Panel, the Triage Cardiac System or
other products it may develop, which would have a material adverse effect on the
Company's business, financial condition and results of operations.

    The Company also relies upon trade secrets, technical know-how and
continuing invention to develop and maintain its competitive position. Others
may independently develop substantially equivalent proprietary information and
techniques or otherwise gain access to the Company's trade secrets or disclose
such technology, and the Company may not be able to protect its trade secrets or
its rights to its trade secrets.

    Others may have filed and in the future are likely to file patent
applications that are similar or identical to those of the Company. To determine
the priority of inventions, the Company may have to participate in interference
proceedings declared by the USPTO that could result in substantial cost to the
Company. Patent applications of others may have priority over patent
applications filed by the Company.

    The commercial success of the Company also depends in part on the Company
neither infringing patents or proprietary rights of third parties nor breaching
any licenses that may relate to the Company's technologies and products. The
Company is aware of several third-party patents that may relate to the Company's
technology. There can be no assurance that the Company does not or will not
infringe these patents, or other patents or proprietary rights of third parties.
In addition, the Company has received and may in the future receive notices
claiming infringement from third parties as well as invitations to take licenses
under third party patents. Any legal action against the Company or its
collaborative partners claiming damages and seeking to enjoin commercial
activities relating to the Company's products and processes affected by third
party rights, in addition to subjecting the Company to potential liability for
damages, may require the Company or its collaborative partner to obtain a
license in order to continue to manufacture or market the affected products and
processes. The Company or its collaborative partners may not prevail in any such
action and any license (including licenses proposed by third parties) required
under any such patent may not be made available on commercially acceptable
terms, or at all. There are a significant number of U.S. and foreign patents and
patent applications in the Company's areas of interest, and the Company believes
that there may be significant litigation in the industry regarding patent and
other intellectual property rights. Litigation concerning patent and other
intellectual property rights could consume a substantial portion of the
Company's managerial and financial resources, which would have a material
adverse effect on the Company's business, financial condition and results of
operations.

POSSIBLE FUTURE CAPITAL REQUIREMENTS; UNCERTAINTY OF ADDITIONAL FUNDING

    The Company believes that its available cash, cash from operations and funds
from existing credit arrangements will be sufficient to satisfy its funding
needs for at least the next 24 months. Thereafter, if cash generated from
operations is insufficient to satisfy the Company's working capital and capital
expenditure requirements, the Company may be required to sell additional equity
or debt securities or obtain additional credit facilities. Additional capital,
if needed, may not be available on satisfactory terms, or at all.

    Furthermore, any additional equity financing may be dilutive to
stockholders, and debt financing, if available, may include restrictive
covenants. The Company's future liquidity and capital funding requirements will
depend on numerous factors, including the extent to which the Company's new
products and products under development are successfully developed, gain market
acceptance and become and remain competitive, the timing and results of clinical
studies and regulatory actions regarding the Company's potential products, the
costs and timing of further expansion of sales, marketing and manufacturing
activities, facilities expansion needs, changes in third party reimbursement
policies and the costs and timing associated with the enforcement, defense and
resolution of patent matters, including potential licensing of certain


                                      -15-
<PAGE>

technologies patented by others. The failure by the Company to raise capital on
acceptable terms when needed could have a material adverse effect on the
Company's business, financial condition and results of operations. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations   Liquidity and Capital Resources."

GOVERNMENT REGULATION; NO ASSURANCE OF OBTAINING REGULATORY APPROVALS

    The testing, manufacture and sale of the Company's products are subject to
regulation by numerous governmental authorities, principally the FDA and
corresponding state and foreign regulatory agencies. Pursuant to the Federal
Food, Drug and Cosmetic Act, and the regulations promulgated thereunder, the FDA
regulates the preclinical and clinical testing, manufacture, labeling,
distribution and promotion of medical devices. The Company will not be able to
commence marketing or commercial sales in the United States of new products
under development until it receives clearance or approval from the FDA, which
can be a lengthy, expensive and uncertain process. Noncompliance with applicable
requirements can result in, among other things, fines, injunctions, civil
penalties, recall or seizure of products, total or partial suspension of
production, failure of the government to grant pre-market clearance or premarket
approval for devices, withdrawal of marketing clearances or approvals, and
criminal prosecution. The FDA also has the authority to request recall, repair,
replacement or refund of the cost of any device manufactured or distributed by
the Company.

    Any devices manufactured or distributed by the Company pursuant to FDA
clearance or approvals are subject to pervasive and continuing regulation by the
FDA and certain state agencies. Before a new device can be introduced in the
market, the manufacturer must generally obtain FDA clearance of a 510(k)
notification or FDA approval of a PMA application. The PMA approval process is
more expensive, uncertain and lengthy than the 510(k) clearance process. The
Company is uncertain of the regulatory path to market that the FDA will
ultimately apply to the Company's products currently in development. Although
the Triage DOA Panel, Triage C. difficile Panel, Triage Parasite Panel and
Triage Cardiac System received 510(k) clearance, a PMA may be required for the
NeoralChek System, the Triage BNP System and Triage LBP System now in
development. With respect to any of the Company's products in development, the
FDA may determine that the Company must adhere to the more costly, lengthy and
uncertain PMA approval process. Modifications to a device that is the subject of
an approved PMA application, its labeling or manufacturing process may require
approval by the FDA of a PMA supplement or a new PMA application. For any
devices that are cleared through the 510(k) process, modifications or
enhancements that could significantly affect safety or effectiveness, or
constitute a major change in the intended use of the device, will require new
510(k) submissions.

    The Company may not be able to obtain necessary regulatory approvals or
clearances for its products on a timely basis, if at all, and delays in receipt
of or failure to receive such approvals or clearances, the loss of previously
received approvals or clearances, limitations on intended use imposed as a
condition of such approvals or clearances, or failure to comply with existing or
future regulatory requirements would have a material adverse effect on the
Company's business, financial condition and results of operations.

    Before the manufacturer of a device can submit the device for FDA clearance
or approval, it generally must conduct a clinical investigation of the device.
Although clinical investigations of most devices are subject to the
Investigational Device Exemption ("IDE") requirements, clinical investigations
of In-vitro Diagnostic tests ("IVD"), such as all of the Company's products and
products under development, are exempt from the IDE requirements, including the
need to obtain the FDA's prior approval, provided the testing is noninvasive,
does not require an invasive sampling procedure that presents a significant
risk, does not intentionally introduce energy into the subject, and is not used
as a diagnostic procedure without confirmation by another medically established
test or procedure. In addition, the IVD must be labeled for "research use only"
("RUO") or "investigational use only" ("IUO"), and distribution controls must be
established to assure that IVDs distributed for research or clinical
investigation are used only for those purposes.

    The Company intends to conduct clinical investigations of its products under
development, which will entail distributing them in the United States on an IUO
basis. There can be no assurance that the FDA would agree that the Company's IUO
distribution of its IVD products under development will meet the requirements
for IDE exemption. Furthermore, failure by the Company or the recipients of its
products under development to maintain compliance with the IDE exemption
requirements could result in enforcement action by the FDA, including, among
other things, the loss of the IDE exemption or the imposition of other
restrictions on the Company's distribution of its products under development,
which would adversely affect the Company's ability to conduct the clinical
investigations necessary to support marketing clearance or approval.

    Manufacturers of medical devices for marketing in the United States are
required to adhere to QSR, which includes testing, control, documentation and
other quality assurance requirements. Manufacturers must also comply with
Medical Device Report ("MDR") requirements that a manufacturer report to the FDA
any incident in which its product may have


                                      -16-
<PAGE>

caused or contributed to a death or serious injury, or in which its product
malfunctioned and would be likely to cause or contribute to a death or serious
injury upon recurrence. Labeling and promotional activities are subject to
scrutiny by the FDA and, in certain circumstances, by the Federal Trade
Commission. Current FDA enforcement policy prohibits the marketing of approved
medical devices for unapproved uses.

    The Company is subject to routine inspection by the FDA and certain state
agencies for compliance with QSR requirements, MDR requirements and other
applicable regulations. The QSR requirements include the addition of design
controls, that will likely increase the cost of compliance. There can be no
assurance that the Company will not incur significant costs to comply with laws
and regulations in the future or that such laws and regulations will not have a
material adverse effect upon the Company's business, financial condition and
results of operation.

    The use of Biosite's products is also affected by the Clinical Laboratory
Improvement Amendments ("CLIA") and related federal and state regulations which
provide for regulation of laboratory testing. The scope of these regulations
includes quality control, proficiency testing, personnel standards and federal
inspections. CLIA categorizes tests as "waived," "moderately complex" or "highly
complex," on the basis of specific criteria. There can be no assurance that any
future amendment of CLIA or the promulgation of additional regulations impacting
laboratory testing would not have a material adverse effect on the Company's
ability to market its products or on its business, financial condition and
results of operations.

DEPENDENCE ON OTHERS FOR THE DEVELOPMENT OF NEW PRODUCTS

    Biosite's strategy for the research, development, commercialization and
distribution of certain of its products entails entering into various
arrangements with corporate partners, licensors, licensees and others, and is
dependent upon the success of these parties in performing their
responsibilities. These parties may not perform their obligations as expected
and no revenue may be derived from these arrangements.

    Biosite has entered into agreements with, among others, Novartis, Scios, and
Xoma for the development and marketing of products. The agreements are subject
to rights of termination and may be terminated. The Company's collaborators may
not abide by their contractual obligations and may discontinue or sell their
current lines of business. The research for which the Company receives or
provides funding may not lead to the development of products. The Company
intends to enter into additional development and marketing agreements. The
Company may not be able to enter into agreements on acceptable terms, or at all.

    The Company is continuing to enhance, with LRE, a hand-held point-of-care
fluorescent meter for use in Triage Meter System products. The meter can be
programmed to run a specific test through the use of changeable proprietary
software that is also under further improvements by LRE. LRE may not improve the
hardware or software on schedule, or at all, and new software that permits the
meter to be used for another Triage Meter System product may not be further
improved.

POTENTIAL INABILITY TO MANAGE GROWTH; DEPENDENCE ON KEY PERSONNEL

    The Company anticipates increased growth in the number of its employees, the
scope of its operating and financial systems and the geographic area of its
operations as new products are developed and commercialized. This growth will
result in an increase in responsibilities for both existing and new management
personnel. The Company's ability to manage growth effectively will require it to
continue to implement and improve its operational, financial and management
information systems and to train, motivate and manage its employees. The Company
may not be able to manage its expansion, and a failure to do so could have a
material adverse effect on the Company's business, financial condition and
results of operations.

    The Company's future success depends in part on the continued service of its
key technical, sales, marketing and executive personnel, and its ability to
identify, hire and retain qualified personnel. Competition for such personnel is
intense and the Company may not be able to retain existing personnel or identify
or hire additional personnel.

PRODUCT LIABILITY EXPOSURE; INADEQUACY OR UNAVAILABILITY OF INSURANCE COVERAGE

    The testing, manufacturing and marketing of medical diagnostic devices such
as the Triage DOA Panel, Triage C. DIFFICILE Panel, Triage Parasite Panel and
Triage Cardiac System, as well as the Company's products currently under
development, entail an inherent risk of product liability claims. To date, the
Company has not experienced any


                                      -17-
<PAGE>

material product liability claims, but any such claims arising in the future
could have a material adverse effect on the Company's business, financial
condition and results of operations. Potential product liability claims may
exceed the amount of the Company's insurance coverage or may be excluded from
coverage under the terms of the policy. The Company's existing insurance may not
be renewed at a cost and level of coverage comparable to that presently in
effect, or at all. In the event that the Company is held liable for a claim
against which it is not indemnified or for damages exceeding the limits of its
insurance coverage, that claim could have a material adverse effect on the
Company's business, financial condition and result of operations.

IMPACT OF YEAR 2000 ISSUE

    The Y2K Issue could have a material adverse impact on the operations of the
Company. Additionally, the systems of other companies on which Biosite's systems
rely may not be timely converted, which may have an adverse effect on the
Company's systems. For example, to the extent that customers would be unable to
order products or pay invoices or suppliers would be unable to manufacture or
deliver product, the Company's operations would be adversely affected.





                                      -18-
<PAGE>

PART II.  OTHER INFORMATION.


ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

         (a)      Exhibits

                  27.1         Financial Data Schedule

         (b)      Reports on Form 8-K.

                  None




                                      -19-
<PAGE>

SIGNATURES

    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.

      Dated:  November 1, 1999     BIOSITE DIAGNOSTICS INCORPORATED


                                   By:   /s/ Christopher J. Twomey
                                         --------------------------------------
                                         Christopher J. Twomey
                                         Vice President, Finance and Chief
                                         Financial Officer (Principal Financial
                                         and Accounting Officer)







                                      -20-
<PAGE>

                                  EXHIBIT INDEX
<TABLE>
<CAPTION>

Exhibit
Number                     Description
- ------                     -----------
<S>                        <C>
27.1                       Financial Data Schedule

</TABLE>







                                      -21-

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S FINANCIAL STATMENTS AS OF AND FOR THE QUARTER ENDED SEPTEMBER 30,
1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
INCLUDED IN THE COMPANY'S 1998 ANNUAL REPORT ON FORM 10-K.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                           2,022
<SECURITIES>                                    28,317
<RECEIVABLES>                                    6,863
<ALLOWANCES>                                         0
<INVENTORY>                                      5,604
<CURRENT-ASSETS>                                45,952
<PP&E>                                          21,281
<DEPRECIATION>                                (11,994)
<TOTAL-ASSETS>                                  65,637
<CURRENT-LIABILITIES>                            6,727
<BONDS>                                          3,915
                                0
                                          0
<COMMON>                                           131
<OTHER-SE>                                      54,863
<TOTAL-LIABILITY-AND-EQUITY>                    65,637
<SALES>                                         11,317
<TOTAL-REVENUES>                                     0
<CGS>                                            3,180
<TOTAL-COSTS>                                    7,449
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  1,394
<INCOME-TAX>                                       554
<INCOME-CONTINUING>                                840
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       840
<EPS-BASIC>                                        .06<F1>
<EPS-DILUTED>                                      .06
<FN>
<F1>EARNINGS PER SHARE IS CALCULATED ON THE BASIS DESCRIBED IN NOTE 2 OF NOTES TO
FINANCIAL STATEMENTS.
</FN>


</TABLE>


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