ARONEX PHARMACEUTICALS INC
10-Q, 1998-05-13
PHARMACEUTICAL PREPARATIONS
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                       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 [NO FEE REQUIRED]

                  For the Quarterly Period Ended March 31, 1998
                                                        OR
    (  ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
         For the transition period from _________ to _________
                           Commission File No. 0-20111

                          ARONEX PHARMACEUTICALS, INC.
             (Exact name of Registrant as specified in its charter)

        Delaware                                     76-0196535
(State or other jurisdiction               (I.R.S. Employer Identification No.)
of incorporation or organization)

          8707 Technology Forest Place, The Woodlands, Texas 77381-1191
               (Address of principal executive office) (Zip Code)
       Registrant's telephone number, including area code: (281) 367-1666

         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___

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

          Class                                Outstanding at March 31, 1998
Common Stock, $.001 par value                        15,467,281 shares

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<PAGE>




                          ARONEX PHARMACEUTICALS, INC.
                         Quarterly Period March 31, 1998

                                      INDEX


                                                                            Page

Factors Affecting Forward Looking Statements.................................. 3

PART I.  Financial Information



                                                                                
Item 1   Financial Statements................................................. 3

         Balance Sheets - December 31, 1997 and March 31, 1998 
         (unaudited).................................. ....................... 4

         Statements of Operations:
           Three Months Ended March 31, 1997 and March 31, 1998
           (unaudited) and for the Period from Inception 
           (June 13, 1986) through March 31, 1998 (unaudited)................. 5

         Statements of Cash Flows:
           Three Months Ended March 31, 1997 and March 31, 1998
           (unaudited) and for the Period from Inception 
           (June 13, 1986) through March 31, 1998 (unaudited)................. 6

         Notes to Financial Statements - March 31, 1998....................... 7

Item 2   Management's Discussion and Analysis of Financial
           Condition and Results of Operations................................ 9


PART II. Other Information

Item 6   Exhibits and Reports on Form 8-K.................................... 11


SIGNATURES        ........................................................... 12


                                                      - 2-

<PAGE>


                          ARONEX PHARMACEUTICALS, INC.
                          (A development stage company)

Factors Affecting Forward-Looking Statements

         This   Quarterly   Report  on  Form  10-Q   includes   "forward-looking
statements"  within the meaning of Section 27A of the Securities Act of 1933, as
amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The
words  "anticipate,"  "believe,"  "expect,"  "estimate,"  "project"  and similar
expressions are intended to identify forward-looking statements. Such statements
are subject to certain risks, uncertainties and assumptions.  Should one or more
of these risks or uncertainties  materialize,  or should underlying  assumptions
prove  incorrect,  actual results may vary  materially  from those  anticipated,
believed,  expected,  estimated or projected.  For additional discussion of such
risks, uncertainties and assumptions, see "Item 1. Business - Manufacturing," "-
Sales and Marketing," "Patents,  Proprietary Rights and Licenses," "- Government
Regulation," "- Competition"  and "- Additional  Business Risks" included in the
Company's  Annual Report on Form 10-K for the year ended  December 31, 1997, and
"Item 2. Management's Discussion and Analysis of Financial Condition and Results
of Operations"  and "- Liquidity and Capital  Resources"  included  elsewhere in
this report.

PART I.           FINANCIAL INFORMATION

Item 1.  Financial Statements

     The following unaudited financial statements have been prepared pursuant to
the rules and  regulations of the Securities  and Exchange  Commission.  Certain
information  and  note  disclosures   normally   included  in  annual  financial
statements prepared in accordance with generally accepted accounting  principles
have been condensed or omitted pursuant to those rules and regulations, although
the Company  believes that the disclosures  made herein are adequate to make the
information presented not misleading.  These financial statements should be read
in  conjunction  with the financial  statements  for the year ended December 31,
1997  included in the  Company's  Annual  Report on Form 10-K for the year ended
December  31,  1997,  filed  pursuant  to Section 13 or 15(d) of the  Securities
Exchange Act of 1934.

     The  information  presented in the  accompanying  financial  statements  is
unaudited,  but in the opinion of management,  reflects all  adjustments  (which
include only normal  recurring  adjustments)  necessary  to present  fairly such
information.




                                                      - 3-

<PAGE>

<TABLE>
                          ARONEX PHARMACEUTICALS, INC.
                          (A development stage company)

                                 BALANCE SHEETS
                  (All amounts in thousands, except share data)


                                     ASSETS
<CAPTION>

                                                                   March 31,
                                                    December 31,  (Unaudited)
                                                        1997          1998     
                                                        ----          ----     
<S>                                                 <C>            <C>

Current Assets:
   Cash and cash equivalents...................... $    2,029      $   3,306
   Short-term investments.........................     17,783         17,235
   Accounts receivable............................        100             --
   Prepaid expenses and other assets..............        474            825
                                                   ----------      ---------
        Total current assets......................     20,386         21,366

Long-term investments.............................     10,142          5,111
Furniture, equipment and leasehold improvements, 
     net..........................................      1,107          2,099
Deposits..........................................        490             --
                                                   ----------      ---------
        Total assets.............................. $   32,125      $  28,576
                                                   ==========      =========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable and accrued expenses.......... $    1,977      $   3,135
   Accrued payroll................................        554            743
   Advance from Genzyme...........................      2,000          2,000
   Current portion of notes payable...............        191             95
   Current portion of obligations under capital
     leases...................                             18             18
                                                   ----------      ---------
        Total current liabilities.................      4,740          5,991

Long-term liabilities:
   Obligations under capital leases, net of
     current portion..............................          6              3
                                                   ----------      ---------
        Total long-term liabilities...............          6              3

Commitments and contingencies

Stockholders' equity:
   Preferred stock $.001 par value, 5,000,000 
     shares authorized, none issued and 
     outstanding..................................        --             --
   Common stock $.001 par value, 30,000,000 shares 
     authorized, 15,459,166 and 15,467,281 shares 
     issued and outstanding, respectively.........         15             15
   Additional paid-in capital.....................     96,606         96,609
   Common stock warrants..........................        967            967
   Treasury stock.................................        (11)           (11)
   Deferred compensation..........................       (907)          (796)
   Unrealized loss on investments.................        (87)           (87)
   Deficit accumulated during development stage...    (69,204)       (74,115)
                                                     --------      ---------
        Total stockholders' equity................     27,379         22,582
                                                     --------      ---------
   Total liabilities and stockholders' equity.....  $  32,125      $  28,576
                                                     ========      =========
</TABLE>


              The accompanying notes are an integral part of these
                             financial statements.

                                                      - 4-

<PAGE>


                          ARONEX PHARMACEUTICALS, INC.
                          (A development stage company)
<TABLE>


                            STATEMENTS OF OPERATIONS
             (All amounts in thousands, except loss per share data)
                                   (Unaudited)


<CAPTION>


                                                                                                       
                                                                                                       Period from
                                                                                                        Inception
                                                                                                         (June 13,
                                                                           Three Months Ended             1986)
                                                                                March 31,                through
                                                                                                         March 31,  
                                                                         1997              1998            1998
                                                                   ------------      ------------      -----------
<S>                                                               <C>               <C>               <C>    
Revenues:
   Interest income..........................................       $        592      $        417      $     5,998
   Research and development grants and contracts............                286               103            5,153
                                                                   ------------      ------------      -----------
        Total revenues......................................                878               520           11,151
                                                                   ------------      ------------      -----------

Expenses:
   Research and development.................................              3,485             4,522           57,657
   Purchase of in-process research and development..........                 --                --           11,625
   General and administrative...............................                456               904           14,708
   Interest expense and other...............................                 30                 5            1,276
                                                                   ------------      ------------      -----------
        Total expenses......................................              3,971             5,431           85,266
                                                                   ------------      ------------      -----------

Net loss....................................................       $     (3,093)     $     (4,911)     $   (74,115)
                                                                   ============      ============      ===========

Basic and diluted loss per share............................       $      (0.21)     $      (0.32)
                                                                   ============      ============

Weighted average shares used in computing basic and
   diluted loss per share...................................             14,620            15,461

</TABLE>



              The accompanying notes are an integral part of these
                             financial statements.

                                                      - 5-

<PAGE>


                          ARONEX PHARMACEUTICALS, INC.
                          (A development stage company)

                            STATEMENTS OF CASH FLOWS
                           (All amounts in thousands)
                                   (Unaudited)
<TABLE>
<CAPTION>

                                                                                                                   Period from
                                                                                                                    Inception
                                                                                                                 (June 13, 1986)
                                                                                      Three Months Ended             through
                                                                                           March 31,                March 31,
                                                                                    1997            1998               1998
                                                                              ------------      ------------      -------------
<S>                                                                          <C>                <C>               <C>
Cash flows from operating activities:
   Net loss. . . . . . ................................................       $     (3,093)     $     (4,911)     $     (74,115)
   Adjustments to reconcile net loss to net cash provided by
     (used in) operating activities-
        Depreciation and amortization..................................                259               169              4,195
        Loss (gain) on disposal of assets..............................                 --                (2)               198
        Compensation expense related to stock and stock options........                193               111              3,347
        Charge for purchase of in-process research and development.....                 --                --             11,547
        Unrealized loss on investment..................................                (31)               --                (87)
        Acquisition costs, net of cash received........................                 --                --               (270)
        Loss in affiliate..............................................                 --                --                500
        Changes in assets and liabilities:
           Increase in prepaid expenses and other assets...............               (587)             (351)              (640)
           Decrease in accounts receivable.............................                 78               100                 --
           Increase in accounts payable and accrued expenses...........                249             1,347              3,805
           Increase in deferred revenue................................                 --                --               (353)
        Accrued interest payable converted to stock....................                 --                --                 97
                                                                              ------------      ------------       ------------
                  Net cash used in operating activities................             (2,932)           (3,537)           (51,776)

Cash flows from investing activities:
   Net sales (purchases) of investments................................              1,876             5,579            (16,611)
   Purchase of furniture, equipment and leasehold improvements.........                (93)           (1,165)            (5,286)
   Proceeds from sale of assets........................................                 --                 6                 60
   Deposits   .........................................................                 --               490                 --
   Investment in affiliate.............................................                 --                --               (500)
                                                                              ------------      ------------       ------------
                  Net cash provided by (used in) investing activities..              1,783             4,910            (22,337)

Cash flows from financing activities:
   Proceeds from notes payable.........................................                 --                --              4,672
   Repayment of notes payable and principal payments under capital
     lease obligations.................................................                (63)              (99)            (2,557)
   Purchase of treasury stock..........................................                 --                --                (11)
   Proceeds from issuance of stock.....................................                 80                 3             75,317
                                                                              ------------      ------------       ------------
                  Net cash provided by (used in) financing activities..                 17               (96)            77,419
                                                                              ------------      ------------       ------------

Net increase (decrease) in cash and cash equivalents...................             (1,132)            1,277              3,306
Cash and cash equivalents at beginning of period.......................              4,179             2,029                 --
                                                                              ------------      ------------       ------------

Cash and cash equivalents at end of period.............................       $      3,047      $      3,306       $      3,306
                                                                              ============      ============       ============
Supplemental disclosures of cash flow information:
   Cash paid during the period for interest............................       $         20      $          5       $        544
Supplemental schedule of noncash financing activities:
   Conversion of notes payable and accrued interest to common stock           $         --      $         --       $      3,043
</TABLE>

         The accompanying notes are an integral part of these financial
                                  statements.

                                                      - 6-

<PAGE>


                          ARONEX PHARMACEUTICALS, INC.
                          (A development stage company)

                          NOTES TO FINANCIAL STATEMENTS
                                 March 31, 1998
                                   (Unaudited)

1.   Organization and Basis of Presentation

     Aronex  Pharmaceuticals,  Inc. ("Aronex  Pharmaceuticals" or the "Company")
was  incorporated  in  Delaware  on  June  13,  1986  and  merged  with  Triplex
Pharmaceutical   Corporation  ("Triplex")  and  Oncologix,   Inc.  ("Oncologix")
effective  September  11,  1995 (the  "Mergers").  Aronex  Pharmaceuticals  is a
development stage company which has devoted  substantially all of its efforts to
research  and product  development  and has not yet  generated  any  significant
revenues,  nor is  there  any  assurance  of  significant  future  revenues.  In
addition,  the Company  expects to continue to incur losses for the  foreseeable
future  and  there  can be no  assurance  that the  Company  will  complete  the
transition  from a  development  stage  company to  successful  operations.  The
research and  development  activities  engaged in by the Company  involve a high
degree of risk and  uncertainty.  The  ability of the  Company  to  successfully
develop,  manufacture and market its proprietary products is dependent upon many
factors.  These factors include, but are not limited to, the need for additional
financing,   attracting  and  retaining  key  personnel  and  consultants,   and
successfully  developing  manufacturing,  sales and  marketing  operations.  The
Company's  ability to develop these  operations may be impacted by uncertainties
related  to  patents  and  proprietary  technologies,  technological  change and
obsolescence,  product  development,  competition,  government  regulations  and
approvals,  health care reform,  third-party reimbursement and product liability
exposure.  Additionally,  the Company is reliant upon collaborative arrangements
for research,  contractual agreements with corporate partners, and its exclusive
license  agreements with M.D.  Anderson Cancer Center ("MD Anderson").  Further,
during the period required to develop these  products,  the Company will require
additional  funds which may not be available to it. The Company expects that its
existing cash resources will be sufficient to fund its cash requirements through
mid-1999.  Accordingly,  there  can  be no  assurance  of the  Company's  future
success.

     The  balance  sheet  at  March  31,  1998  and the  related  statements  of
operations  and cash flows for the three month periods ending March 31, 1998 and
1997 and the period from  inception  (June 13, 1986)  through March 31, 1998 are
unaudited. These interim financial statements should be read in conjunction with
the December 31, 1997  financial  statements  and related  notes.  The unaudited
interim financial  statements  reflect all adjustments which are, in the opinion
of management, necessary for a fair statement of results for the interim periods
presented and all such  adjustments are of a normal  recurring  nature.  Interim
results are not necessarily indicative of results for a full year.

2.   Accounting Policies

     The Company has adopted Statement of Financial Accounting Standards No. 130
("SFAS 130"), Reporting Comprehensive Income. SFAS 130 requires the reporting of
comprehensive  income in addition to net income from  operations.  Comprehensive
income  is a  more  inclusive  financial  reporting  methodology  that  includes
disclosure  of certain  financial  information  that  historically  has not been
recognized in the  calculation  of net income.  Comprehensive  income (loss) was
$(3,124,000)  and  $(4,911,000)  for the three  months  ended March 31, 1997 and
1998, respectively.

3.   Cash, Cash Equivalents and Investments

     Cash and cash  equivalents  include money market  accounts and  investments
with an original  maturity of less than three  months.  At March 31,  1998,  all
short-term  investments are held to maturity securities consisting of high-grade
commercial paper and U.S.  Government backed securities with a carrying value of
$17,235,000,   which   approximates  fair  market  value  and  cost.   Long-term
investments  include (i) held to maturity  securities  consisting  of high-grade
commercial  paper that  mature  over one to two years  with a carrying  value of
$3,500,000,  which  approximates  fair market value and cost, and (ii) available
for sale  securities  which are U.S.  mortgage  backed  securities  with various
maturity  dates  over the next  several  years  that have an  amortized  cost of
$1,698,000,  a fair market value of $1,611,000  and a gross  unrealized  loss of
$87,000 at March 31, 1998. The Company currently has no trading securities.
<PAGE>

4.   Federal Income Taxes

     At  December  31,  1997,   the  Company  had  net  operating  loss  ("NOL")
carryforwards  for federal income tax purposes of  approximately  $79.0 million.
The Tax  Reform  Act of 1986  provided  a  limitation  on the use of NOL and tax
credit  carryforwards  following  certain ownership changes that could limit the
Company's  ability  to  utilize  these NOLs and tax  credits.  Accordingly,  the
Company's  ability to  utilize  the above NOL and tax  credit  carryforwards  to
reduce future taxable income and tax liabilities may be limited.  As a result of
the merger with Triplex and Oncologix, a change in control as defined by federal
income tax law occurred,  causing the use of these  carryforwards  to be limited
and possibly  eliminated.  Additionally because United States tax laws limit the
time during which NOLs and the tax credit  carryforwards  may be applied against
future taxable income and tax  liabilities,  the Company may not be able to take
full advantage of its NOLs and tax credit  carryforwards  for federal income tax
purposes.  The carryforwards will begin to expire in 2001 if not otherwise used.
Due to the possibility of not reaching a level of profitability  that will allow
for the utilization of the Company's deferred tax assets, a valuation  allowance
has been  established  to offset these tax assets.  The Company has not made any
federal income tax payments since inception.


                                                      - 8-

<PAGE>

Item 2. Management's  Discussion and Analysis of Financial Condition and Results
        of Operations

Results of Operations

     Overview

     Since  its  inception  in  1986,  Aronex  Pharmaceuticals,   Inc.  ("Aronex
Pharmaceuticals"  or the "Company") has primarily  devoted its resources to fund
research, drug identification and development. The Company has been unprofitable
to date and expects to incur  operating  losses for the next several years as it
expends its  resources for product  research and  development,  preclinical  and
clinical testing and regulatory compliance. The Company has sustained net losses
of  approximately  $74.1  million from  inception  through  March 31, 1998.  The
Company has  primarily  financed  its research and  development  activities  and
operations  through public and private  offerings of  securities.  The Company's
operating  results have fluctuated  significantly  during each quarter,  and the
Company  anticipates  that such  fluctuations,  largely  attributable to varying
commitments and  expenditures  for clinical trials and research and development,
will continue for the next several years.

     Three Month Periods Ended March 31, 1997 and 1998

     Interest income on cash, cash  equivalents and investments was $417,000 and
$592,000 for the three months ended March 31, 1998 and 1997,  respectively.  The
decrease of $175,000  was  primarily  due to a decrease of funds  available  for
investment in 1998.

     Revenues from research and  development  grants and contracts were $103,000
and $286,000 for the three months ended March 31, 1998 and 1997, respectively, a
decrease of $183,000.  In the first  quarter of 1997,  research and  development
revenue was composed of (i) $150,000 in revenue from the initiation of a license
agreement with Boehringer Mannheim GmbH and (ii) $136,000 in development revenue
from Targeted Genetics, Incorporated ("Targeted"). The three year agreement with
Targeted ended in the second quarter of 1997.  Research and development  revenue
for the first quarter of 1998  represents  Small  Business  Innovative  Research
("SBIR") grant revenue relating to Zintevir(TM).

     Research and  development  expenses were $4,522,000 in the first quarter of
1998  compared  to  $3,485,000  in the first  quarter of 1997.  The  increase of
$1,037,000  was  primarily  due to (i) an  increase  of  $1,094,000  in clinical
investigation  cost, the majority of which relates to the Company's lead product
NYOTRAN(TM)  and (ii) an increase of $318,000 in medical  affairs  salaries  and
payroll  costs  as  the  number  of  personnel  in  this  department   increased
significantly.   These  increases  were  partially   offset  by  a  decrease  of
approximately $400,000 in research expenses in the first quarter of 1998.

     General and  administrative  expenses were $904,000 in the first quarter of
1998 and $456,000 in the first  quarter of 1997,  an increase of $448,000.  This
increase was  primarily due to (i) an increase of $384,000 in salary and payroll
costs and (ii) an  increase  of $40,000 in business  travel  relating  mainly to
business development activities. Several new positions have been added since the
first  quarter of 1997,  including a Vice  President of  Marketing  and Business
Development  in the third quarter of 1997 and a Chief  Executive  Officer in the
fourth quarter of 1997.  Additionally,  the Company's President, who resigned in
January 1998,  is entitled to certain  severance  payments in accordance  with a
termination and severance agreement with the Company.  These severance payments,
which continue  through January 1999,  were recorded as compensation  expense in
the first quarter of 1998.

     Interest  expense was $5,000 and $30,000 for the three  months  ended March
31,  1998 and 1997,  respectively.  The $25,000  decrease  in  interest  expense
resulted  primarily  from a decrease in the balance of notes payable and capital
leases which were obtained to finance furniture and equipment.

     Net  loss  for  the  first  quarter  of 1998  increased  by  $1,818,000  to
$4,911,000  in the first quarter of 1998,  compared to $3,093,000  for the first
quarter  of 1997,  due  mainly  to the  increase  in  research  and  development
expenses. The majority of research and development expenses related to advancing
the Company's two lead products, NYOTRAN(TM) and ATRAGEN(R) .

                                                      - 9-

<PAGE>



Liquidity and Capital Resources

     Since its  inception,  the Company's  primary  source of cash has been from
financing  activities,  which  have  consisted  primarily  of  sales  of  equity
securities.  The Company has raised an  aggregate of  approximately  $75 million
from the sale of equity securities from its inception through March 31, 1998. In
July 1992, the Company raised net proceeds of approximately $10.7 million in the
initial  public  offering of its Common Stock.  In September  1993,  the Company
entered into a collaborative  agreement with Genzyme relating to the development
and  commercialization  of  ATRAGEN(R)  , in  connection  with which the Company
received  net  proceeds of  approximately  $4.5  million from the sale of Common
Stock to Genzyme. In November 1993 and May 1996, the Company raised net proceeds
of approximately $11.5 and $32.1 million,  respectively,  in public offerings of
Common  Stock.  From October 1995 through March 31, 1998,  the Company  received
aggregate  net  proceeds of  approximately  $6.5  million  from the  exercise of
certain warrants issued in its 1995 merger with Oncologix. Prior to the Mergers,
Triplex  had  raised  $22.0  million  from sales of equity  securities  and $7.5
million from  collaborative  agreements  and SBIR grants,  of which $6.7 million
remained as cash,  cash-equivalents and investments at the effective time of the
Mergers.  From its inception  until March 31, 1998, the Company also received an
aggregate of $4.8 million cash from collaborative arrangements and SBIR grants.

     The Company's primary use of cash to date has been in operating  activities
to fund research and  development,  including  preclinical  studies and clinical
trials, and general and administrative  expenses.  Cash of $2.9 million and $3.5
million was used in operating  activities  during the first  quarter of 1997 and
1998,  respectively.  The Company had cash,  cash-equivalents and short-term and
long-term  investments  of  $25.7  million  as of  March  31,  1998,  consisting
primarily of cash and money market accounts and U.S.  government  securities and
investment grade corporate bonds.

     The Company has experienced  negative cash flows from operations  since its
inception  and  has  funded  its   activities  to  date  primarily  from  equity
financings. The Company has expended, and will continue to require,  substantial
funds to continue research and development,  including  preclinical  studies and
clinical trials of its products,  and to commence sales and marketing efforts if
Federal Drug  Administration  and other regulatory  approvals are obtained.  The
Company expects that its existing  capital  resources will be sufficient to fund
its capital requirements through mid-1999.  Thereafter, the Company will need to
raise  substantial  additional  capital to fund its  operations.  The  Company's
capital  requirements  will  depend on many  factors,  including  the  problems,
delays,  expenses and complications  frequently encountered by development stage
companies;  the progress of the  Company's  research,  development  and clinical
trial  programs;  the  extent and terms of any  future  collaborative  research,
manufacturing,  marketing or other funding arrangements; the costs and timing of
seeking regulatory approvals of the Company's products; the Company's ability to
obtain  regulatory  approvals;  the success of the Company's sales and marketing
programs;  costs of filing,  prosecuting  and defending and enforcing any patent
claims  and  other  intellectual  property  rights;  and  changes  in  economic,
regulatory  or  competitive   conditions  in  the  Company's  planned  business.
Estimates  about the adequacy of funding for the Company's  activities are based
on certain  assumptions,  including the  assumption  that testing and regulatory
procedures  relating to the  Company's  products  can be  conducted at projected
costs.  There can be no  assurance  that changes in the  Company's  research and
development plans, acquisitions,  or other events will not result in accelerated
or unexpected expenditures. To satisfy its capital requirements, the Company may
seek to raise  additional  funds in the public or private capital  markets.  The
Company's  ability to raise  additional  funds in the public or private  markets
will be  adversely  affected if the  results of its  current or future  clinical
trials are not  favorable.  The  Company  may seek  additional  funding  through
corporate collaborations and other financing vehicles. There can be no assurance
that any such funding will be available to the Company on favorable  terms or at
all. If adequate funds are not available, the Company may be required to curtail
significantly one or more of its research or development  programs, or it may be
required to obtain funds through arrangements with future collaborative partners
or others that may require  the Company to  relinquish  rights to some or all of
its  technologies  or  products.  If the  Company  is  successful  in  obtaining
additional  financing,  the  terms of such  financing  may have  the  effect  of
diluting or adversely affecting the holdings or the rights of the holders of the
Company's Common Stock.



                                                      - 10-

<PAGE>



PART II.          OTHER INFORMATION




Item 6.  Exhibits and Reports on Form 8-K

     (a) Exhibits

         10.1     Employment Termination and  Severance Agreement  dated January
                  15, 1998, between the Company and James. M. Chubb.

         10.2     Consulting  Agreement  dated  January  1,  1998,  between  the
                  Company and Gabriel Lopez- Berestein.

         10.3     Consulting  Agreement dated April 1, 1998, between the Company
                  and Roman Perez-Solar.

         11.1     Statement regarding computation of per share earnings.

         27.1     Financial data schedule.

     (b) Reports on Form 8-K

         None


                                                      - 11-

<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.



                                    ARONEX PHARMACEUTICALS, INC.




Dated:   May 11, 1998               By:/S/GEOFFREY F. COX
                                       ------------------
                                    Geoffrey F. Cox, Ph.D.
                                    Chief Executive Officer







Dated:   May 11, 1998               By:/S/TERANCE A. MURNANE
                                       ---------------------
                                    Terance A. Murnane
                                    Controller
                                    (Principal Financial and Accounting Officer)


                                                      - 12-


                 EMPLOYMENT TERMINATION AND SEVERANCE AGREEMENT
 
          THIS EMPLOYMENT TERMINATION AND SEVERANCE AGREEMENT (this "Termination
Agreement")  is entered  into as of January  15,  1998,  by and  between  Aronex
Pharmaceuticals,  Inc. ("Aronex"), and James M. Chubb, an individual residing at
183 Bristol Bend Circle, The Woodlands, Texas 77382 ("Employee").
 
          WHEREAS,  Aronex and Employee have previously  entered into an Amended
and  Restated  Employment  Agreement  dated  January 15,  1996 (the  "Employment
Agreement");
 
          WHEREAS,  Employee  intends to resign from his employment  with Aronex
effective January 15, 1998 (the "Effective Date "); and
 
          WHEREAS,  Aronex and  Employee now wish to  terminate  the  Employment
Agreement and release each other from any claims  arising  thereunder  effective
upon the Effective Date;
 
          NOW,  THEREFORE,  in  consideration  of the  premises  and the  mutual
covenants contained herein, the parties hereto agree as follows:
 
          1. Termination. The Employment Agreement is terminated effective as of
the  Effective  Date and none of the parties  shall have any  further  rights or
obligations  thereunder  after the Effective Date except as expressly  specified
herein.
 
          2. Severance. For and in consideration of Employee's execution of this
Termination  Agreement,  Aronex will,  subject to the further provisions of this
Termination Agreement,  (i) pay Employee monthly payments of $19,583 (Employee's
current  Base  Salary)  for the  period  beginning  as of January  15,  1998 and
continuing  through  January  15,  1999,  payable  as and  when  Employee  would
otherwise  be paid his salary  under  Section  4.1 of the  Employment  Agreement
(collectively,  the "Severance Payments"),  (ii) continue to pay through January
15, 1999 the premiums required for Employee's  continued  coverage under (A) the
Company's group medical and dental plans for Employee and Employee's family, (B)
the disability  insurance presently maintained by the Company for the benefit of
Employee and (C) the life insurance presently  maintained by the Company for the
benefit of Employee and Employee's  beneficiaries,  (iii) provide  Employee with
basic  outplacement  services  (consisting  of office  space and  administrative
assistance) through Lee Hecht Harrison or a reasonably  equivalent  outplacement
services  provider selected by Aronex,  (iv) continue to pay Employee's  regular
annual  membership  dues to  maintain  Employee's  membership  at The  Woodlands
Country Club through  January 15, 1999,  (v) extend (and hereby does extend) the
period  during which  options  granted to Employee  under  Aronex's  Amended and
Restated  1989 Stock Option Plan (the  "Plan") may vest until  January 31, 2000,
with the same effect under the terms of such options as if Employee  remained an
employee of Aronex  through such date,  and (vi) extend (and hereby does extend)
the period during which Employee may exercise  options granted to Employee under
the Plan,  to the extent  such  options are vested as of the  Effective  Date or
become vested pursuant to the preceding  clause of this  Termination  Agreement,
until  February 28, 2000.  The  Severance  Payments  shall not be subject to any
reduction  or right of offset as a result of  Employee's  employment  by another
entity during the term of this Termination Agreement, and the Severance Payments
and the benefits  contemplated  by clause (ii) above shall not be subject to any
reduction  or right of  offset as a result of  Employee's  death or  disability,
provided in each such case that  Employee has complied with the terms of Section
3 hereof and the terms of Section 5 hereof and the agreements referenced therein
(insofar as such terms of Section 5 and the agreements referenced therein relate
to  Employee's   obligations   regarding   confidentiality,   nondisclosure  and
inventions).

<PAGE>

          3. Release of Aronex by Employee.  (a) Employee, on behalf of himself,
his heirs, beneficiaries and personal representatives,  hereby releases, acquits
and forever  discharges Aronex,  its of officers,  employees,  former employees,
stockholders,  directors,  agents and assigns,  and all other persons,  firms or
corporations  in control of, under the  direction  of, or in any way  associated
with Aronex  (collectively,  the "Aronex  Affiliates"),  of and from all claims,
charges, complaints, liabilities,  obligations, promises, agreements, contracts,
damages, actions, causes of action, suits, accrued benefits or other liabilities
of any kind or character,  whether known or hereafter discovered,  arising from,
growing out of, or in any way connected with or related to Employee's employment
with, and/or  termination of employment from, Aronex and the Aronex  Affiliates,
including,   but  not  limited   to,   allegations   of  wrongful   termination,
discrimination,   breach  of  contract,   intentional  infliction  of  emotional
distress,  invasion  of privacy,  promissory  estoppel,  whistleblowing,  fraud,
termination  for refusal to perform an illegal  act,  defamation,  any action in
tort or contract,  any action for unpaid  wages,  attorney's  fees,  or punitive
damages,  and any violation of any federal,  state, or local law,  including but
not limited to, any  violation of Title VII of the Civil Rights Acts of 1964 and
1991,  as amended,  42 U.S.C.  2000e et seq.,  the Civil Rights Act of 1866,  42
U.S.C. 1981 et seq., the Equal Pay Act, 29 U.S.C.  206, the Employee  Retirement
Income  Security Act of 1974, as amended  (ERISA),  29 U.S.C.  1001 et seq., the
Americans  with  Disabilities  Act,  42 U.S.C.  12101 et.  seq.,  the Fair Labor
Standards  Act, as amended,  29 U.S.C.  621 et seq., the Age  Discrimination  in
Employment Act, as amended,  29 U.S.C. 621 et seq., the Family and Medical Leave
Act of 1993,  29 U.S.C.  2601 et seq.,  the Worker  Adjustment  and  Restraining
Notification Act (WARN),  29 U.S.C.  2101 et seq., the Texas Commission on Human
Rights Act, as amended,  Texas Labor Code 21.001 et seq.,  the Texas Payday Act,
Texas Labor Code 61.001 et seq., the Texas Workers' Compensation Statute,  Texas
Labor Code 451.001 et seq.  and any other civil  rights act, and all  amendments
made to any such laws from time to time,  provided  that the  foregoing  release
shall not apply to the  express  obligations  of Aronex  under this  Termination
Agreement.

          (b) Employee  agrees not to commence any legal  proceeding  or lawsuit
against Aronex or any Aronex  Affiliate  arising out of or based upon Employee's
employment with Aronex or any Aronex  Affiliate or because of the termination of
Employee's employment with Aronex or any Aronex Affiliate.

          (c) The  consideration  cited above and the promises  contained herein
are made for the  purpose  of  purchasing  the  peace of Aronex  and the  Aronex
Affiliates  and are not to be  construed  as an  admission  of  liability  or as
evidence  of  unlawful  conduct  by Aronex  or any  Aronex  Affiliate,  all such
liability being herein expressly denied.

          (d) Employee  voluntarily accepts the Severance Payments as sufficient
payment for the full, final and complete release stated herein,  and agrees that
no other promises or representations  have been made to Employee by Aronex or an
Aronex  Affiliate or any other person  purporting to act on the behalf of Aronex
or an Aronex Affiliate, except as expressly stated herein.

          (e)  Employee  understands  that this is a full,  complete,  and final
release of Aronex and the  Aronex  Affiliates.  As  evidenced  by the  signature
below,  Employee  expressly  promises  and  represents  to Aronex and the Aronex
Affiliates that he has completely read this Agreement and understands its terms,
contents,  conditions,  and effects.  Employee stipulates and agrees that Aronex
and Aronex  Affiliates do not owe Employee anything in addition to what Employee
will be receiving pursuant to Section 2 of this Termination Agreement.


     (f)   Employee   hereby   waives  all  rights  to  recall,   reinstatement,
reemployment and past or future wages from Aronex and the Aronex  Affiliates and
further,   acknowledges   that   Employee  is  not  entitled  to  any  continued
participation  in, or benefits under,  any employee benefit plan or compensation
program of Aronex or any Aronex Affiliate,  including,  without limitation,  any
profit, bonus or commission arrangement,  the Plan, the Employment Agreement and
any other  employment  agreement  (whether  written or oral)  with the  Company,
except as may otherwise be required by ERISA or as otherwise expressly set forth
herein.
 
<PAGE>

          4. Release of Employee by Aronex.  Aronex, on behalf of itself and the
Aronex Affiliates, hereby releases, acquits and forever discharges Employee, his
heirs,  beneficiaries  and  personal  representatives,  of and from all  claims,
charges, complaints, liabilities,  obligations, promises, agreements, contracts,
damages, actions, causes of action, suits, accrued benefits or other liabilities
of any kind or character,  whether known or hereafter discovered,  arising from,
growing out of, or in any way connected with or related to Employee's employment
with, and/or  termination of employment from, Aronex and the Aronex  Affiliates,
provided that the foregoing  release shall not apply to the express  obligations
of Employee under this  Termination  Agreement or as  contemplated  by Section 5
below.
 
          5. Acknowledgment of Remaining Obligations Under Employment Agreement.
Employee   acknowledges   that   he   is   subject   to   agreements   regarding
confidentiality,  nondisclosure,  inventions and noncompetition  pursuant to the
provisions   of  Sections  8  and  9  of  the   Employment   Agreement  and  the
confidentiality  and  non-disclosure   agreement   referenced   therein,   which
provisions  and  obligations  remain in full  force and  effect  following  this
Termination Agreement.
 
          6.  Statements to Third  Parties.  Aronex agrees that it will not make
any  statements to third  parties which are intended to disparage,  discredit or
injure the  reputation  of Employee.  Employee  agrees that he will not make any
statements to third parties which are intended to disparage, discredit or injure
the reputation of Aronex or any Aronex Affiliate.
 
          7. No Assignment of Claims.  Employee  hereby warrants that he has not
assigned,  transferred  or conveyed at any time to any  individual or entity any
alleged right,  claim or cause of action against Aronex or any Aronex Affiliate.
Employee  agrees to and does  hereby  indemnify  and hold  Aronex and the Aronex
Affiliates  harmless from any claims,  liabilities,  damages,  demands,  losses,
costs,  debts and  causes of action  whatsoever,  including  without  limitation
attorney's fees, whether known or unknown,  which may be asserted by parties for
breach of the foregoing warranty.

          8. No Duress,  Etc.  Employee  hereby  warrants  to Aronex that he has
completely read this Termination  Agreement prior to executing it, and has had a
reasonable  period  of time  within  which to  consider  this  Agreement  and to
understand its terms, contents, conditions and effects and has entered into this
Termination  Agreement knowingly and voluntarily.  Employee  understands that he
has the right to consult an  attorney of his choice and  represents  that he has
consulted with an attorney. Employee states that he is not presently affected by
any disability which would prevent him from knowingly and voluntarily  executing
this Termination Agreement, and further states that the promises made herein are
not made under duress,  coercion or undue influence.  Employee  understands that
Employee  has  twenty-one  days  within  which  to  consider  and  execute  this
Agreement,  and that this  Agreement  is  revocable  by Employee for a period of
seven days  following  the date of  execution of this  Agreement,  and if not so
revoked,  this Agreement will automatically  become effective and enforceable on
the eighth day following the date of its execution.
<PAGE>

          9.  Amendment.  This  Termination  Agreement  may  not be  amended  or
modified  in any  respect  except by an  agreement  in writing  executed  by the
parties in the same manner as this Agreement.

          10. Successors.  This Termination  Agreement shall be binding upon and
shall  inure to the  benefit of and be  enforceable  by each of the  parties and
their respective successors and assigns.

          11. Invalid Provisions. If any provision of this Termination Agreement
is held to be  illegal,  invalid or  unenforceable  under  present or future law
effective during the term hereof, such provision shall be fully severable.  This
Termination  Agreement  shall be  construed  and  enforced  as if such  illegal,
invalid or  unenforceable  provision  had never  comprised a part hereof and the
remaining portions hereof shall remain in full force and effect and shall not be
effected by the illegal,  invalid or unenforceable provision or by its severance
here  from.  Furthermore,  in lieu of such  illegal,  invalid  or  unenforceable
provision,  there  shall be  added  automatically,  as part of this  Termination
Agreement,   a  provision   similar  in  terms  to  such  illegal,   invalid  or
unenforceable provision as may be possible and be legal, valid and enforceable.

          12.  Descriptive  Headings.  The  descriptive  headings of the several
sections of this  Termination  Agreement are inserted for  convenience  only and
shall not control or affect the meaning or construction of any of the provisions
hereof.

          13. Governing Law. This Termination Agreement shall be governed by and
construed and enforced in accordance  with the laws of the State of Texas.  

          14. Entire  Agreement.  This  Termination  Agreement  constitutes  the
entire  agreement  between the parties hereto with respect to the subject matter
of this Termination Agreement and supersedes and is in full substitution for any
and all prior agreements and understandings whether written or oral between said
parties relating to the subject matter of this Termination Agreement.


          IN WITNESS  WHEREOF,  the parties have duly executed this  Termination
Agreement effective as of the date first above written.

                                             EMPLOYEE:
                                             James M. Chubb



                                            
                                             ARONEX PHARMACEUTICALS, INC.




                                             By:
                                             Geoffrey Cox
                                             Chairman of the Board and
                                             Chief Executive Officer


                              CONSULTING AGREEMENT

          This  Consulting  Agreement is made and entered into as of the 1st day
of  January,  1998,  by and between  Aronex  Pharmaceuticals,  Inc.,  a Delaware
corporation  (hereinafter referred to as "Company") and Gabriel  Lopez-Berestein
(hereinafter referred to as a "Consultant").

          WHEREAS, Consultant desires to provide special expertise and knowledge
to Company in the area of  biochemistry  and/or drug  development and to consult
with  Company on such  specific  research  projects in the area as may be agreed
upon from time to time in writing  between  the Company  and  Consultant,  which
written  agreement(s) shall be incorporated  herein by reference and made a part
hereof (hereinafter "Consulting Subjects"); and

          WHEREAS,  Company  desires  to  retain  Consultant  as an  independent
contractor  upon the  terms and  conditions  hereinafter  set  forth to  provide
consulting  and  advisory  services  to Company  based on  Consultant's  special
knowledge and expertise in the Consulting Subjects;

          NOW,  THEREFORE,  for and in consideration of the mutual covenants and
promises  and  representations  contained  herein,  and other good and  valuable
consideration,  the receipt and  sufficiency  of which are hereby  acknowledged,
Company and Consultant agree as follows:

          1. Expertise of Consultant.

          1.1 Consultant  represents that he has special expertise and knowledge
concerning  the  Consulting  Subjects  and that he is  willing  to and wishes to
provide his  consultation  and advisory  services to Company in connection  with
such area or areas.

          1.2  Consultant   hereby  represents  and  warrants  to  Company  that
Consultant  is not a party to any  agreement  with any other  entity  and is not
bound by any  obligations  to any other  entity  which will  prevent or encumber
Consultant  from  performing  such  services  for  Company,   except  for  those
agreements, if any, identified on Exhibit A hereto and approved by the Company.

          2. Independent Contractor.

          2.1 Consultant  hereby agrees to perform for Company or any affiliate,
parent or  subsidiary  of Company  and to  provide to Company or any  affiliate,
parent or subsidiary of Company his personal  consultation and advisory services
in the Consulting  Subjects in accordance with the terms of this  Agreement.  To
the extent  services  pursuant to this  Agreement  are  performed  for or at the
request of an  affiliate,  parent,  or  subsidiary,  the term  "Company" as used
herein shall include such entity.

          2.2 Throughout the entire term of this Agreement,  Consultant shall be
an independent contractor with the full power and authority to select the means,
method and manner of performing his services hereunder;  provided, however, that
Consultant  will perform  consulting and advisory or other services in the areas
designated by Company.  Consultant  will in no way be considered to be an agent,
employee  or servant of  Company.  Consultant  shall have no  authority  to bind
Company in any capacity for any purpose.

          2.3 It is not  the  purpose  or  intention  of this  Agreement  or the
parties  to  create,  and the same  shall  not be  construed  as  creating,  any
partnership,  joint venture,  agency, or employment  relationship.  However,  as
specified below, due to the nature of this independent contractor  relationship,
it is the  intent  of the  parties  that,  during  the  term of this  Agreement,
Consultant  shall owe to  Company  fiduciary  duties of the utmost  loyalty  and
fidelity.
<PAGE>

          3. General Duties and Compensation.

          3.1 During the term of this Agreement, Consultant shall, at such times
and locations as are reasonably  requested by Company and at either the Company,
The  University  of Texas System Cancer  Center and M.D.  Anderson  Hospital and
Tumor  Institute  or such other  location  agreed upon  between  Consultant  and
Company, provide personal consultation and advisory services as may from time to
time be agreed upon between the Company and  Consultant,  perform and  supervise
the  performance by others of research with respect to (a) Consulting  Subjects,
and (b) any other  areas of interest  upon which  Consultant  and Company  shall
mutually  agree.  Consultant  shall  be so  available  during  the  term of this
Agreement  for such  periods  as may be agreed  upon  from time to time  between
Company and Consultant, as and when specific research projects are agreed upon.

          3.2 For the  performance  of his  obligations  under  this  Agreement,
Company  shall pay the  Consultant  a fee at the rate of  $156,000.00  per year,
one-half  of which  shall be  payable  in cash and  one-half  of which  shall be
payable in the form of a grant of the Company's  Common Stock.  The cash portion
of such fee shall be payable  monthly  on the 15th day of each month  during the
term of this  Agreement.  The Common Stock portion of such fee for each calendar
year during the term of this Agreement  shall be payable on January 15th of such
year,  and shall  vest with  respect  to 1/12 of the  shares of Common  Stock so
granted  on the  15th  day of each  month  of such  calendar  year,  subject  to
forfeiture  of the then unvested  portion of such shares upon the  expiration of
the  term or  other  termination  of  this  Agreement  prior  to the end of such
calendar  year.  The  number of shares of Common  Stock to be  granted  shall be
determined  by  reference  to the fair  market  value of the Common  Stock as of
January  1st of the year in which such grant is made,  which  shall be (i) $4.25
per share of Common  Stock  for the  grant to be made with  respect  to the 1998
calendar  year and (ii) the Average  Closing  Price (as  defined  below) for any
subsequent calendar year during the term of this Agreement. For purposes of this
Agreement,  the "Average Closing Price" as of January 1st of any year shall mean
the average  closing price of the Company's  Common Stock reported on the Nasdaq
Stock  Market or any national  securities  exchange on which the Common Stock is
then  listed  during the period of 10  consecutive  trading  days ending one day
before such date. In addition, Company shall reimburse Consultant for reasonable
and necessary  expenses  which are incurred in connection  with his providing of
consulting  services and with respect to which Consultant  promptly  provides to
Company a detailed  expense  account,  provided  that any item of  expense  over
$1,500 has been approved by the Company in advance and in writing.

          3.3 Consultant  shall himself pay, and Company shall have no liability
for,  all  social  security,   federal  income  taxes,  unemployment  insurance,
workmen's compensation  insurance,  pensions,  annuities or other liabilities or
taxes incurred by or on behalf of or for the benefit of Consultant or any of his
agents, employees or servants who are not employed by the Company arising out of
the performance by Consultant of his obligations under this Agreement.

          4. Duty of  Faithfulness  owed by Consultant to Company During Term of
Agreement.

          4.1  During  the  term of this  Agreement  or any  extension  thereof,
Consultant  shall  faithfully  perform and provide the services  contemplated by
this Agreement for Company, and Consultant shall not perform the same or similar
services for any other entity.


<PAGE>

          4.2 In addition to the other  obligations  agreed to by  Consultant in
this  Agreement,  Consultant  agrees  that  following  the  termination  of this
Agreement he shall not at any time  directly or indirectly  (a) induce,  entice,
solicit any employee or  consultant of the Company to leave his  employment,  or
(b) contact, communicate or solicit any customer of the Company derived from any
customer list,  customer lead, mail, printed matter or information  secured from
the Company or its present or past employees, or (c) in any other manner use any
customer lists or customer leads, mail, telephone numbers,  printed materials or
material of the Company relating thereto.

          5. Disclosure and Ownership of Information.

          5.1 For the  purposes  of this  Agreement,  "Proprietary  Information"
shall mean all  information,  ideas,  concepts,  improvements,  discoveries  and
inventions  (including  those relating to research,  development,  financial and
sales data, pricing or trading terms,  evaluations,  opinions,  interpretations,
the identity of customers or of their requirements or of key contacts within the
customer's  organizations,  and marketing  and  merchandising  technique(s)  (i)
possessed,  acquired or developed by Company at any time,  irrespective of their
subject or nature, or (ii) conceived,  made, developed or acquired by Consultant
or disclosed or made known to Consultant,  individually  or jointly with others,
in  connection  with or as a  result  of  Consultant's  performance  under  this
Agreement that relate to the business, products or services of Company and/or to
the  Consulting  Subjects.  The term  "Proprietary  Information"  shall  include
without limitation all test data, documents,  memoranda,  notes, records, files,
correspondence,  drawings,  manuals, models,  specifications,  designs, computer
programs,  maps and all other writings or materials of any type embodying any of
such Proprietary Information.

          5.2 All Proprietary Information is and shall be the sole and exclusive
property of the Company.

          5.3 (a) During the term of this Agreement,  Consultant  shall promptly
disclose in writing to Company all Proprietary Information conceived, developed,
made or acquired by  Consultant,  either  individually  or jointly  with others,
whether patentable or not, and whether or not reduced to practice,  irrespective
of whether Consultant utilized Company's time, data,  facilities or material and
irrespective of whether such  Proprietary  Information is conceived,  developed,
discovered or acquired by Consultant on the job, at home, or elsewhere.

          (b) Consultant hereby specifically agrees to sell, assign and transfer
to Company or its nominee,  and by the execution of this  Agreement  does hereby
sell,  assign and  transfer  to Company or its  nominee,  all of his  world-wide
right, title and interest in and to all of the Proprietary Information described
in Section  5.3(a),  and any United States or foreign  applications  for patents
copyrights,  certificates of invention and other  industrial  rights that may be
filed  thereon,  including  divisions,  continuations,  continuations  in  part,
reissues  or  extension  thereon.  Both  during the term of this  Agreement  and
thereafter,  Consultant  agrees to at any time assist Company and/or its nominee
in the protection of such Proprietary  Information assigned herein to Company or
its nominee, both in the United States and foreign countries,  including but not
limited  to, the  execution  of all lawful  oaths and all  assignment  documents
requested by Company or its nominee in the  preparation,  prosecution,  issuance
and  enforcement  of any  applications  for United  States or  foreign  patents,
including  divisions,  continuations,  continuations in part, or reissued and/or
extensions  thereof,  of any  industrial  property  rights and  certificates  of
invention;  and/or any United States or foreign rights protecting proprietary or
confidential information.  If such assistance takes place after the term of this
Agreement has expired,  Consultant shall be paid by Company at a reasonable rate
(taking into  consideration  the services  performed  by  Consultant  as well as
Consultant's  normal  and  customary  rates)  for any  time  actually  spent  so
assisting Company or its nominee.
<PAGE>


          5.4  Consultant  recognizes  that the  protection  of the  Proprietary
Information of Company  against  unauthorized  disclosure and use is of critical
importance to Company,  and therefore  Consultant agrees to use his best efforts
and  exercise  utmost   diligence  to  protect  and  safeguard  the  Proprietary
Information  of  Company  and its  affiliates,  if any,  and,  except  as may be
expressly required by Company in connection with Consultant's performance of his
obligations to Company under this Agreement, Consultant shall not, either during
the term of this  Agreement or thereafter,  directly or indirectly,  use for his
own benefit or for the benefit of another,  or disclose to another,  any of such
Proprietary Information.

          5.5 Upon  termination  of this  Agreement,  or at any other  time upon
request, Consultant shall immediately deliver to Company all documents embodying
any of Company's Proprietary Information, including all test data.

          5.6 If during the term of this Agreement,  Consultant creates any work
of authorship  fixed in any tangible  medium of  expression  that is the subject
matter of copyright and that relates to Company's (or its  affiliate's,  if any)
business, products, or services, Company shall be deemed the author of such work
if the work is prepared by Consultant in the scope of his or her  consultancy by
virtue of the work  being a work made for hire or, if the work was not  prepared
by Consultant  within the scope of his or her employment or consultancy  but was
specially  ordered by Company as a contribution to a collective  work, as a part
of  a  motion  picture  or  other  audio-visual  work,  as a  translation,  as a
supplementary  work, as a compilation or as an instructional test, then the work
shall be  considered to be work made for hire and Company shall be the author of
the work.  With  regard to any other work of  authorship  fixed in any  tangible
medium of expression  that is the subject  matter of copyright and which relates
specifically  to the  business,  products  or  services of the Company or to the
Consulting  Subjects,  Consultant agrees to, and does hereby,  assign to Company
all worldwide  right,  title and interest in and to such works.  Both during the
term of this Agreement and thereafter,  Consultant  agrees to assist Company and
its nominee,  at any time, in the protection of Company's worldwide right, title
and interest in and to the work and all rights of copyright  therein,  including
but not limited to, the execution of all formal assignment  documents  requested
by Company or its nominee and the execution of all lawful oaths and applications
of registration of copyright in the United States and foreign countries.

          With regard to any work of  authorship  described  above,  the Company
agrees that it will consider and approve in its sole  discretion  such works for
publication  purposes  upon the request of  Consultant,  provided  that any such
publications  (i)  shall be  limited  to  scientific  publications,  (ii)  shall
identify clearly the relationship of Consultant to the Company,  and (iii) shall
not be  permitted if there would be, as a result of such  publication,  any risk
presented to potentially patentabl developments,  until steps have been taken to
protect such developments.

          5.7  Notwithstanding  anything in this Article 5 to the contrary,  the
Company  acknowledges  that Consultant is currently,  and will be throughout the
term of this  Agreement,  an employee of The  University  of Texas System Cancer
Center,  M. D.  Anderson  Hospital and Tumor  Institute  ("Anderson"),  and that
nothing  herein  shall  interfere  or  conflict  with  any  existing  employment
agreements or relationships between Consultant and Anderson. The Company further
acknowledges that the term "Proprietary Information",  as defined in Section 5.1
hereof and as used in this Article 5, shall not include any information,  ideas,
concepts,   improvements,   discoveries   and   inventions   which   Consultant,
individually or jointly,  conceives,  makes,  develops or acquires,  or which is
disclosed or made known to  Consultant,  while  Consultant  is working under the
Research and Development  Contract  between the Company and Anderson,  or on any
other sponsored research and development  agreement applicable to Anderson,  but
shall only apply to such information, ideas, concepts, improvements, discoveries
and inventions conceived, made, developed or required,  individually or jointly,
or made  known or  disclosed  to  Consultant,  while  Consultant  is  engaged in
performing services to Company under this Agreement.
<PAGE>

          6. Term and Termination.

          6.1 The initial term of this Agreement  (the "Initial  Term") shall be
for a period of three  years from the  effective  date of this  Agreement.  Upon
expiration  of  the  Initial  Term  (and  upon  expiration  of the  term  of any
subsequent extension), the term of this Agreement shall be automatically renewed
and extended for an additional one-year period,  unless one of the parties shall
give written notice to the other of its intention to terminate this Agreement at
least 30 days prior to the  expiration  of the  Initial  Term or any  subsequent
one-year  extension,  in  which  case  this  Agreement  shall  terminate  on the
expiration of the Initial Term or subsequent one-year extension, as the case may
be.

          6.2  Termination  of  this  Agreement   shall  not  affect   Company's
obligation to pay for services previously  performed by Consultant and shall not
affect Consultant's  continuing obligations to Company in Sections 3.3, 4.2, and
5.1  through  5.6  above,  whether  such  termination  is  made  voluntarily  or
involuntarily, by Company or Consultant, with or without cause.

          7. Terms Applicable to the Issuance of Common Stock.

          7.1 Unless the  offering,  sale and delivery of shares of Common Stock
issuable to  Consultant  pursuant to this  Agreement  have been  registered  and
continue to be so at the date of exercise  hereof  under the  Securities  Act of
1933 (the  "Act"),  Consultant  agrees  that the  shares of Common  Stock  which
Consultant  acquires thereby shall be acquired for investment  without a view to
distribution, within the meaning of the Act, and shall not be sold, transferred,
assigned,  pledged or hypothecated  in the absence of an effective  registration
statement  for the shares of Common  Stock  under the Act and  applicable  state
securities laws or an applicable exemption from the registration requirements of
the Act and any applicable state  securities  laws.  Consultant also agrees that
the shares of Common Stock which he may acquire  pursuant to this Agreement will
not be sold or disposed of in any manner  which would  constitute a violation of
any other  applicable  securities  laws,  whether federal or state. In addition,
Consultant  agrees (A) that the  certificates  representing the shares of Common
Stock issued under this Agreement may bear such legend or legends as the Company
deems appropriate in order to assure compliance with applicable securities laws,
and (B) that the Company may give  instruction to its transfer agent, if any, to
stop  transfer of the shares of Common Stock issued under this  Agreement on the
stock transfer  records of the Company,  if such proposed  transfer would in the
opinion of counsel  satisfactory  to the Company  constitute  a violation of any
applicable securities law or any such agreements.

          7.2 Consultant hereby represents and warrants that no provision in, or
activity  contemplated  by this  Agreement,  including  without  limitation  the
compensation  to be  received  by him  pursuant  to  Section  3.2,  violates  or
conflicts  with any  agreement,  regulation or policy by which he is bound or to
which he is subject,  whether related to his employment or otherwise,  except as
disclosed  on Exhibit A hereto and agreed to by the Company.  Consultant  agrees
that if any such violation or conflict  exists or arises in the future,  he will
be solely responsible for the satisfactory resolution thereof,  without recourse
to the  Company,  including  without  limitation  any  required  forfeitures  or
dispositions of compensation,  options or stocks.  Consultant agrees to disclose
to his employer the compensation  arrangements contained in this Agreement,  and
to provide  the  Company an  acknowledgment  thereof by such  employer  or other
evidence of such disclosure.
<PAGE>

          8. Miscellaneous.

          8.1 This  Agreement  shall inure to the benefit of and be binding upon
the respective heirs, executors,  successors,  representatives and assigns (and,
to the extent the last sentence of Section 2.1 applies, affiliates,  parents and
subsidiaries)  of the  parties,  as the  case  may be;  provided,  however,  the
obligations of each party herein to the other herein are personal and may not be
assigned without the express written consent of such other party.

          8.2 The laws of the State of Texas  will  govern  the  interpretation,
validity and effect of this  Agreement  without regard to the place of execution
or the place of performance thereof,  and the courts in Houston,  Harris County,
Texas shall have personal  jurisdiction  over Company and the Consultant to hear
all disputes  arising out of this  Agreement and venue shall be proper with such
courts to hear such  disputes.  In the event either Company or the Consultant is
not able to effect service of process upon the other in any  litigation  brought
in such courts with respect to such disputes, it is agreed that the Secretary of
State for the State of Texas shall be an agent of Company and the  Consultant to
receive service of process.

          8.3  Notices  or  payments  given by one party to the other  hereunder
shall be deemed to have been properly given or paid if deposited with the United
States Postal Service, registered or certified mail, addressed to the Consultant
at the address  listed below his  signature on the last page hereof,  and to the
Company at the following address, or in either case to such other address as the
party  receiving  notice shall have  designated  by written  notice to the other
party: Aronex Pharmaceuticals,  Inc. 8707 Technology Forest Place The Woodlands,
Texas 77381

          8.4 This Agreement  replaces all previous  agreements and  discussions
relating to the subject  matters  hereof and  constitutes  the entire  agreement
between  Company and  Consultant  with  respect to the  subject  matters of this
Agreement.  Without  limiting  the  foregoing,  this  Agreement  supersedes  and
terminates,  effective  January 1, 1998, the Consulting  Agreement dated July 1,
1988  between the Company and  Consultant,  as amended by the first,  second and
third amendments  thereto.  This Agreement may not be modified in any respect by
any verbal statement,  representation or agreement made by any employee, officer
or representative of Company,  or by any written document unless it is signed by
an officer of Company.

          8.5 If any term or  provision  of this  Agreement  is deemed  invalid,
contrary  to  or  prohibited   under  applicable  laws  or  regulations  of  any
jurisdiction, such provision shall be revised to the extent permitted by law and
the remaining provisions hereof shall not be invalidated.

          8.6 Both Consultant and Company  recognize that irreparable  injury or
damage  will  result to the  business of the other in the event of the breach of
any covenant  herein,  and each such party therefore agrees that in the event of
such breach by it, the other party shall be  entitled,  in addition to any legal
or equitable  remedies and damages  available,  to an injunction to restrain the
violation of this Agreement by the breaching  party and all other persons acting
for or on behalf of the breaching party.
<PAGE>


          IN WITNESS  WHEREOF,  the parties  have  executed  this  Agreement  in
duplicate originals effective the date first stated above.

                                              ARONEX PHARMACEUTICALS, INC. 


                                                               
Gabriel Lopez-Berestein                       Geoffrey Cox
                                              Chairman of the Board and
                                              Chief Executive Officer



                              CONSULTING AGREEMENT

          This  Consulting  Agreement is made and entered into as of the 1st day
of  April,  1998,  by and  between  Aronex  Pharmaceuticals,  Inc.,  a  Delaware
corporation  (hereinafter  referred to as the "Company") and Roman  Perez-Soler,
M.D. (hereinafter referred to as the "Consultant").

          WHEREAS,  the  Consultant  desires to provide  special  expertise  and
knowledge to the Company in the area of oncology  and  clinical  research and to
consult with the Company on such specific  research  projects in the area as may
be  agreed  on from  time  to  time  in  writing  between  the  Company  and the
Consultant, which written agreement(s) shall be incorporated herein by reference
and made a part hereof (hereinafter, the "Consulting Subjects"); and

          WHEREAS,   the  Company   desires  to  retain  the  Consultant  as  an
independent  contractor  on the terms and  conditions  hereinafter  set forth to
provide   consulting  and  advisory   services  to  the  Company  based  on  the
Consultant's special knowledge and expertise in the Consulting Subjects;

          NOW,  THEREFORE,  for and in consideration of the mutual covenants and
promises  and  representations  contained  herein,  and other good and  valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Company and the Consultant agree as follows:

          1. Expertise of Consultant.

          1.1 The  Consultant  represents  that  he has  special  expertise  and
knowledge  concerning  the  Consulting  Subjects  and that he is  willing to and
wishes to provide  his  consultation  and  advisory  services  to the Company in
connection with such area or areas.

          1.2 The Consultant  hereby represents and warrants to the Company that
the  Consultant is not a party to any agreement with any other entity and is not
bound by any  obligations to any other entity which will prevent or encumber the
Consultant  from  performing  such  services for the  Company,  except for those
agreements, if any, identified on Exhibit A hereto and approved by the Company.

          2. Independent Contractor.

          2.1 The  Consultant  hereby  agrees to perform  for the Company or any
affiliate,  parent or subsidiary of the Company and to provide to the Company or
any affiliate, parent or subsidiary of the Company his personal consultation and
advisory  services in the  Consulting  Subjects in accordance  with the terms of
this Agreement.  To the extent services pursuant to this Agreement are performed
for or at the request of an affiliate, parent, or subsidiary, the term "Company"
as used herein shall include such entity.

          2.2 Throughout the entire term of this Agreement, the Consultant shall
be an  independent  contractor  with the full power and  authority to select the
means,  method  and  manner of  performing  his  services  hereunder;  provided,
however,  that the  Consultant  will  perform  consulting  and advisory or other
services in the areas  designated by the Company.  The Consultant will in no way
be considered to be an agent, employee or servant of the Company. The Consultant
shall have no authority to bind the Company in any capacity for any purpose.

          2.3 It is not  the  purpose  or  intention  of this  Agreement  or the
parties  to  create,  and the same  shall  not be  construed  as  creating,  any
partnership,  joint venture,  agency, or employment  relationship.  However,  as
specified below, due to the nature of this independent contractor  relationship,
it is the intent of the parties  that,  during the term of this  Agreement,  the
Consultant  shall owe to the Company  fiduciary duties of the utmost loyalty and
fidelity.
<PAGE>

          3. General Duties and Compensation.

          3.1 During the term of this Agreement,  the Consultant  shall, at such
times and locations as are reasonably requested by the Company and at either the
Company's  offices,  The  University  of Texas  System  Cancer  Center  and M.D.
Anderson  Hospital  and Tumor  Institute  or such other  location or  laboratory
facilities  agreed on between the Consultant and the Company,  provide  personal
consultation and advisory services as may from time to time be agreed on between
the Company and the Consultant,  perform and supervise the performance by others
of research with respect to (a) Consulting Subjects,  and (b) any other areas of
interest on which the  Consultant  and the Company  shall  mutually  agree.  The
Consultant  shall be so  available  during the term of this  Agreement  for such
periods  as may be agreed  on from  time to time  between  the  Company  and the
Consultant, as and when specific research projects are agreed on.

          3.2 For the performance of his obligations  under this Agreement,  the
Company  shall  pay the  Consultant  a fee at the rate of  $48,000.00  per year,
one-half  of which  shall be  payable  in cash and  one-half  of which  shall be
payable in the form of a grant of the Company's  common  stock,  par value $.001
per share (the  "Common  Stock").  The cash portion of such fee shall be payable
monthly on the 15th day of each month  during  the term of this  Agreement.  The
Common Stock portion of such fee for each year during the term of this Agreement
shall be payable on April 15th of such year, and shall vest with respect to 1/12
of the  shares of Common  Stock so granted on the 15th day of each month of such
year,  subject to forfeiture of the then unvested  portion of such shares on the
expiration of the term or other  termination of this Agreement  prior to the end
of such  year.  The  number of shares of  Common  Stock to be  granted  shall be
determined by reference to the fair market value of the Common Stock as of April
1st of the year in which such grant is made,  which shall be (i) $3.50 per share
of Common Stock for the grant to be made with respect to the 1998  calendar year
and (ii) the  Average  Closing  Price  (as  defined  below)  for any  subsequent
calendar year during the term of this Agreement. For purposes of this Agreement,
the "Average  Closing  Price" as of April 1st of any year shall mean the average
closing price of the Company's  Common Stock reported on the Nasdaq Stock Market
or any  national  securities  exchange on which the Common  Stock is then listed
during the period of 10  consecutive  trading  days  ending one day before  such
date. In addition, the Company shall reimburse the Consultant for reasonable and
necessary  expenses  which are  incurred in  connection  with his  providing  of
consulting  services and with respect to which the Consultant  promptly provides
to the Company a detailed  expense  account,  provided  that any item of expense
over $1,500 has been approved by the Company in advance and in writing.

          3.3 The  Consultant  shall  himself pay, and the Company shall have no
liability  for,  all  social  security,   federal  income  taxes,   unemployment
insurance,  workmen's  compensation  insurance,  pensions,  annuities  or  other
liabilities  or taxes  incurred  by or on  behalf of or for the  benefit  of the
Consultant  or any of his agents,  employees or servants who are not employed by
the Company  arising out of the performance by the Consultant of his obligations
under this Agreement.

          4. Duty of  Faithfulness  owed by Consultant to Company During Term of
Agreement.

          4.1 During the term of this  Agreement or any extension  thereof,  the
Consultant  shall  faithfully  perform and provide the services  contemplated by
this Agreement for the Company, and the Consultant shall not perform the same or
similar services for any other entity.
<PAGE>
          4.2 In addition to the other  obligations  agreed to by the Consultant
in this Agreement,  the Consultant agrees that following the termination of this
Agreement,  he shall not at any time directly or indirectly (a) induce,  entice,
solicit any employee or  consultant of the Company to leave his  employment,  or
(b) contact, communicate or solicit any customer of the Company derived from any
customer list,  customer lead, mail, printed matter or information  secured from
the Company or its present or past employees, or (c) in any other manner use any
customer lists or customer leads, mail, telephone numbers,  printed materials or
material of the Company relating thereto.

          5. Disclosure and Ownership of Information.

          5.1 For the  purposes  of this  Agreement,  "Proprietary  Information"
shall mean all  information,  ideas,  concepts,  improvements,  discoveries  and
inventions  (including  those relating to research,  development,  financial and
sales data, pricing or trading terms,  evaluations,  opinions,  interpretations,
the identity of customers or of their requirements or of key contacts within the
customer's  organizations,   and  marketing  and  merchandising  techniques  (i)
possessed,  acquired or  developed by the Company at any time,  irrespective  of
their subject or nature, or (ii) conceived,  made,  developed or acquired by the
Consultant or disclosed or made known to the Consultant, individually or jointly
with others,  in connection with or as a result of the Consultant's  performance
under this  Agreement  that relate to the business,  products or services of the
Company and/or to the Consulting  Subjects.  The term "Proprietary  Information"
shall include, without limitation, all test data, documents,  memoranda,  notes,
records,  files,  correspondence,  drawings,  manuals,  models,  specifications,
designs, computer programs, maps and all other writings or materials of any type
embodying any of such Proprietary Information.

          5.2 All Proprietary Information is and shall be the sole and exclusive
property of the Company.

          5.3 (a)  During  the  term of this  Agreement,  the  Consultant  shall
promptly  disclose  in  writing  to  the  Company  all  Proprietary  Information
conceived, developed, made or acquired by the Consultant, either individually or
jointly with others,  whether  patentable  or not, and whether or not reduced to
practice,  irrespective  of whether the Consultant  utilized the Company's time,
data,  facilities  or material  and  irrespective  of whether  such  Proprietary
Information is conceived, developed, discovered or acquired by the Consultant on
the job, at home, or elsewhere.

          (b) The  Consultant  hereby  specifically  agrees to sell,  assign and
transfer to the Company or its nominee,  and by the execution of this  Agreement
does hereby sell, assign and transfer to the Company or its nominee,  all of his
worldwide right, title and interest in and to all of the Proprietary Information
described in Section 5.3(a),  and any United States or foreign  applications for
patents, copyrights,  certificates of invention and other industrial rights that
may be filed thereon, including divisions, continuations, continuations in part,
reissues  or  extension  thereon.  Both  during the term of this  Agreement  and
thereafter,  the Consultant  agrees to at any time assist the Company and/or its
nominee in the protection of such Proprietary Information assigned herein to the
Company  or its  nominee,  both in the  United  States  and  foreign  countries,
including,  but not  limited  to,  the  execution  of all  lawful  oaths and all
assignment documents requested by the Company or its nominee in the preparation,
prosecution,  issuance and enforcement of any  applications for United States or
foreign patents, including divisions,  continuations,  continuations in part, or
reissued  and/or  extensions  thereof,  of any  industrial  property  rights and
certificates of invention; and/or any United States or foreign rights protecting
proprietary or confidential  information.  If such assistance  takes place after
the term of this  Agreement  has expired,  the  Consultant  shall be paid by the
Company at a reasonable rate (taking into  consideration the services  performed
by the Consultant as well as the  Consultant's  normal and customary  rates) for
any time actually spent so assisting the Company or its nominee.
<PAGE>

          5.4 The Consultant  recognizes  that the protection of the Proprietary
Information  of  the  Company  against  unauthorized  disclosure  and  use is of
critical importance to the Company, and therefore,  the Consultant agrees to use
his best efforts and exercise  utmost  diligence  to protect and  safeguard  the
Proprietary  Information of the Company and its affiliates,  if any, and, except
as may be expressly  required by the Company in connection with the Consultant's
performance  of his  obligations  to  the  Company  under  this  Agreement,  the
Consultant  shall not,  either during the term of this  Agreement or thereafter,
directly or  indirectly,  use for his own benefit or for the benefit of another,
or disclose to another, any of such Proprietary Information.

          5.5 On termination of this Agreement, or at any other time on request,
the Consultant shall immediately  deliver to the Company all documents embodying
any of the Company's Proprietary Information, including all test data.

          5.6 If during the term of this Agreement,  the Consultant  creates any
work of  authorship  fixed in any  tangible  medium  of  expression  that is the
subject  matter  of  copyright  and  that  relates  to  the  Company's  (or  its
affiliate's,  if any)  business,  products,  or services,  the Company  shall be
deemed the author of such work if the work is prepared by the  Consultant in the
scope of his or her consultancy by virtue of the work being a work made for hire
or, if the work was not  prepared by the  Consultant  within the scope of his or
her  employment or  consultancy  but was  specially  ordered by the Company as a
contribution  to a  collective  work,  as a part of a  motion  picture  or other
audio-visual work, as a translation,  as a supplementary  work, as a compilation
or as an  instructional  test, then the work shall be considered to be work made
for hire and the  Company  shall be the author of the work.  With  regard to any
other work of authorship  fixed in any tangible medium of expression that is the
subject  matter of copyright  and which  relates  specifically  to the business,
products  or  services  of  the  Company  or to  the  Consulting  Subjects,  the
Consultant  agrees to, and does  hereby,  assign to the  Company  all  worldwide
right,  title and  interest in and to such  works.  Both during the term of this
Agreement and  thereafter,  the Consultant  agrees to assist the Company and its
nominee,  at any time, in the protection of the Company's worldwide right, title
and interest in and to the work and all rights of copyright therein,  including,
but not limited to, the execution of all formal assignment  documents  requested
by the  Company  or its  nominee  and the  execution  of all  lawful  oaths  and
applications  of  registration  of  copyright  in the United  States and foreign
countries.

          With regard to any work of  authorship  described  above,  the Company
agrees that it will consider and approve in its sole  discretion  such works for
publication  purposes on the request of the  Consultant,  provided that any such
publications  (i)  shall be  limited  to  scientific  publications,  (ii)  shall
identify  clearly the  relationship of the Consultant to the Company,  and (iii)
shall not be permitted if there would be, as a result of such  publication,  any
risk presented to  potentially  patentable  developments,  until steps have been
taken to protect such developments.

          5.7  Notwithstanding  anything in this Article 5 to the contrary,  the
Company  acknowledges  that the Consultant is currently,  and will be throughout
the term of this Agreement, an employee of The University of Texas System Cancer
Center,  M. D.  Anderson  Hospital and Tumor  Institute  ("Anderson"),  and that
nothing  herein  shall  interfere  or  conflict  with  any  existing  employment
agreements or  relationships  between the Consultant  and Anderson.  The Company
further  acknowledges  that the term  "Proprietary  Information,"  as defined in
Section  5.1  hereof  and as used in this  Article  5,  shall  not  include  any
information, ideas, concepts, improvements, discoveries and inventions which the
Consultant,  individually or jointly, conceives, makes, develops or acquires, or
which is  disclosed or made known to the  Consultant,  while the  Consultant  is
working  under the Research  and  Development  Contract  between the Company and
Anderson,   or  on  any  other  sponsored  research  and  development  agreement
applicable  to  Anderson,  but  shall  only  apply to such  information,  ideas,
concepts, improvements, discoveries and inventions conceived, made, developed or
required, individually or jointly, or made known or disclosed to the Consultant,
while the Consultant is engaged in performing services to the Company under this
Agreement. 
<PAGE>

          6. Term and  Termination.  

          6.1 The initial term of this Agreement  (the "Initial  Term") shall be
for a  period  of one  year  from  the  effective  date  of this  Agreement.  On
expiration of the Initial Term (and on expiration of the term of any  subsequent
extension),  the term of this  Agreement  shall  be  automatically  renewed  and
extended for an additional one-year period, unless one of the parties shall give
written  notice to the other of its  intention  to terminate  this  Agreement at
least 30 days prior to the  expiration  of the  Initial  Term or any  subsequent
one-year  extension,  in  which  case  this  Agreement  shall  terminate  on the
expiration of the Initial Term or subsequent one-year extension, as the case may
be.

          6.2  Not used.

          6.3  Termination  of this  Agreement  shall not affect  the  Company's
obligation to pay for services previously  performed by the Consultant and shall
not effect the  Consultant's  continuing  obligations to the Company in Sections
3.3,  4.2,  and  5.1  through  5.6  above,  whether  such  termination  is  made
voluntarily or involuntarily,  by the Company or the Consultant, with or without
cause.

          7. Terms Applicable to the Issuance of Common Stock.

          7.1 Unless the  offering,  sale and delivery of shares of Common Stock
issuable to the Consultant  pursuant to this Agreement have been  registered and
continue to be so at the date of exercise  hereof  under the  Securities  Act of
1933, as amended (the "Act"),  the  Consultant  agrees that the shares of Common
Stock which the  Consultant  acquires  thereby shall be acquired for  investment
without a view to distribution,  within the meaning of the Act, and shall not be
sold,  transferred,  assigned,  pledged  or  hypothecated  in the  absence of an
effective  registration  statement  for the shares of Common Stock under the Act
and  applicable  state  securities  laws or an  applicable  exemption  from  the
registration  requirements of the Act and any applicable  state securities laws.
The Consultant  also agrees that the shares of Common Stock which he may acquire
pursuant to this  Agreement  will not be sold or disposed of in any manner which
would  constitute a violation of any other applicable  securities laws,  whether
federal or state. In addition,  the Consultant  agrees (A) that the certificates
representing  the shares of Common Stock issued  under this  Agreement  may bear
such  legend or  legends as the  Company  deems  appropriate  in order to assure
compliance  with applicable  securities  laws, and (B) that the Company may give
instruction  to its transfer  agent,  if any, to stop  transfer of the shares of
Common Stock issued under this  Agreement on the stock  transfer  records of the
Company, if such proposed transfer would in the opinion of counsel  satisfactory
to the Company  constitute a violation of any  applicable  securities law or any
such agreements.
<PAGE>

          7.2 The  Consultant  hereby  represents and warrants that no provision
in, or activity contemplated by this Agreement,  including,  without limitation,
the  compensation  to be received by him  pursuant to Section  3.2,  violates or
conflicts  with any  agreement,  regulation or policy by which he is bound or to
which he is subject,  whether related to his employment or otherwise,  except as
disclosed  on  Exhibit A hereto  and agreed to by the  Company.  The  Consultant
agrees that if any such violation or conflict exists or arises in the future, he
will be solely  responsible for the  satisfactory  resolution  thereof,  without
recourse to the Company, including, without limitation, any required forfeitures
or dispositions of compensation, stock options or shares of restricted stock (or
other  unrestricted  shares held by the  Consultant).  The Consultant  agrees to
disclose  to his  employer  the  compensation  arrangements  contained  in  this
Agreement, and to provide the Company an acknowledgment thereof by such employer
or other evidence of such disclosure.

          8. Miscellaneous.

          8.1 This Agreement shall inure to the benefit of and be binding on the
respective heirs,  executors,  successors,  representatives and assigns (and, to
the extent the last  sentence of Section 2.1  applies,  affiliates,  parents and
subsidiaries)  of the  parties,  as the  case  may be;  provided,  however,  the
obligations of each party herein to the other herein are personal and may not be
assigned without the express written consent of such other party.

          8.2 The laws of the State of Texas  will  govern  the  interpretation,
validity and effect of this  Agreement  without regard to the place of execution
or the place of performance thereof,  and the courts in Houston,  Harris County,
Texas shall have personal  jurisdiction  over the Company and the  Consultant to
hear all disputes  arising out of this  Agreement and venue shall be proper with
such  courts to hear such  disputes.  In the event  either  the  Company  or the
Consultant  is not  able to  effect  service  of  process  on the  other  in any
litigation  brought in such courts with respect to such  disputes,  it is agreed
that the  Secretary  of State  for the  State of Texas  shall be an agent of the
Company and the Consultant to receive service of process.

          8.3  Notices  or  payments  given by one party to the other  hereunder
shall be deemed to have been properly given or paid if deposited with the United
States Postal Service, registered or certified mail, addressed to the Consultant
at the address  listed below his  signature on the last page hereof,  and to the
Company at the following address, or in either case to such other address as the
party  receiving  notice shall have  designated  by written  notice to the other
party:

                    Aronex Pharmaceuticals, Inc. 
                    8707 Technology Forest Place 
                    The Woodlands, Texas 77381-1191
                    Attention: Chairman

          8.4 This Agreement  replaces all previous  agreements and  discussions
relating to the subject  matters  hereof and  constitutes  the entire  agreement
between the Company and the  Consultant  with respect to the subject  matters of
this Agreement.  Without limiting the foregoing,  this Agreement  supersedes and
terminates,  effective  April 1, 1998,  the Consulting  Agreement  dated July 1,
1996, as amended, between the Company and the Consultant. This Agreement may not
be modified in any respect by any verbal statement,  representation or agreement
made by any employee,  officer  representative  of the Company or by any written
document unless it is signed by an officer of the Company.
<PAGE>

          8.5 If any term or  provision  of this  Agreement  is deemed  invalid,
contrary  to  or  prohibited   under  applicable  laws  or  regulations  of  any
jurisdiction, such provision shall be revised to the extent permitted by law and
the remaining provisions hereof shall not be invalidated.

          8.6 Both the  Consultant and the Company  recognize  that  irreparable
injury or damage  will  result to the  business of the other in the event of the
breach of any covenant herein,  and each such party therefore agrees that in the
event of such breach by it, the other party  shall be  entitled,  in addition to
any legal or  equitable  remedies and damages  available,  to an  injunction  to
restrain the violation of this  Agreement by the  breaching  party and all other
persons acting for or on behalf of the breaching party.

          IN WITNESS  WHEREOF,  the parties  have  executed  this  Agreement  in
duplicate originals effective the date first stated above.

                                        ARONEX PHARMACEUTICALS, INC.




                                        By:
 Roman Perez-Soler, M.D.
 Address:                               Geoffrey F. Cox, Ph.D
 The University of Texas                Chairman of the Board and
 M.D. Anderson Cancer Center            Chief Executive Officer
 1515 Holcombe Blvd.
 Houston, Texas 77030





                          ARONEX PHARMACEUTICALS, INC.


                                                                    Exhibit 11.1
Statement Regarding Computation of Per Share Earnings

The following  reflects the information used in calculating the number of shares
in the  computation  of net loss per share for each of the  periods set forth in
the Statements of Operations.
<TABLE>
<CAPTION>

                                                                                               Average                     Loss
                                                          Days                                  Shares                     Per
                                        Shares         Outstanding      Shares X  Days       Outstanding       Loss       Share

<S>                                     <C>                 <C>             <C>    
Quarter Ended March 31, 1997:
                                        14,597,247          8              116,777,976
                                        14,606,972         12              175,283,664
                                        14,612,023          4               58,448,092
                                        14,612,499         21              306,862,479
                                        14,615,983          6               87,695,898
                                        14,616,981          1               14,616,981
                                        14,624,239          5               73,121,195
                                        14,625,111          2               29,250,222
                                        14,627,695          7              102,393,865
                                        14,628,567          6               87,771,402
                                        14,640,311          6               87,841,866
                                        14,643,658          6               87,861,948
                                        14,644,672          1               14,644,672
                                        14,644,816          5               73,224,080
                                                           90            1,315,794,340   /90  14,619,937     (3,093,000)   (0.21)

Quarter Ended March 31, 1998:
                                        15,459,166         11              170,050,826
                                        15,460,684         71            1,097,708,564
                                        15,465,729          1               15,465,729
                                        15,467,281          7              108,270,967
                                                           90            1,391,496,086   /90  15,461,068     (4,911,000)   (0.32)

</TABLE>





<TABLE> <S> <C>

<ARTICLE>                                                                      5


          <LEGEND>  THIS  SCHEDULE   CONTAINS  SUMMARY   FINANCIAL   INFORMATION
     EXTRACTED FROM THE FINANCIAL STATEMENTS OF ARONEX  PHARMACEUTICALS INC. SET
     FORTH IN THE COMPANY'S  FORM 10-Q FOR THE THREE MONTHS ENDED March 31, 1998
     AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                                          1
       
<S>                                                                 <C>
<PERIOD-TYPE>                                                     3-MOS
<FISCAL-YEAR-END>                                           DEC-31-1998
<PERIOD-END>                                                MAR-31-1998
<CASH>                                                        3,306,000
<SECURITIES>                                                 22,346,000
<RECEIVABLES>                                                         0
<ALLOWANCES>                                                          0
<INVENTORY>                                                           0
<CURRENT-ASSETS>                                             21,366,000
<PP&E>                                                        5,914,000
<DEPRECIATION>                                                3,815,000
<TOTAL-ASSETS>                                               28,576,000
<CURRENT-LIABILITIES>                                         5,991,000
<BONDS>                                                               0
<COMMON>                                                         15,000
                                                 0
                                                           0
<OTHER-SE>                                                   22,567,000
<TOTAL-LIABILITY-AND-EQUITY>                                 28,576,000
<SALES>                                                               0
<TOTAL-REVENUES>                                                520,000
<CGS>                                                                 0
<TOTAL-COSTS>                                                         0
<OTHER-EXPENSES>                                                      0
<LOSS-PROVISION>                                                      0
<INTEREST-EXPENSE>                                                5,000
<INCOME-PRETAX>                                             (4,911,000)
<INCOME-TAX>                                                          0
<INCOME-CONTINUING>                                         (4,911,000)
<DISCONTINUED>                                                        0
<EXTRAORDINARY>                                                       0
<CHANGES>                                                             0
<NET-INCOME>                                                (4,911,000)
<EPS-PRIMARY>                                                     (.32)
<EPS-DILUTED>                                                     (.32)
        

</TABLE>


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