Filed by Pfizer Inc.
                           pursuant to Rule 425 under the Securities Act of 1933
                                           and deemed filed pursuant Rule 14a-12
                                          of the Securities Exchange Act of 1934
                                                   Commission File No: 001-02516
                                                Subject Company: Pharmacia Corp.

"THE FOLLOWING SCRIPT WAS USED BY PFIZER INC. AND PHARMACIA CORPORATION DURING
                     A CONFERENCE CALL ON JULY 15, 2002"

                           SCRIPT FOR CONFERENCE CALL
                               (PFIZER/PHARMACIA)
                   11:00 A.M. - 12:30 PM, MONDAY, 15 JULY 2002


             [AT 11:00 AM, THE OPERATOR WILL ANNOUNCE THE BEGINNING
              OF THE CONFERENCE CALL AND INTRODUCE "DR. MCKINNELL"]


HANK MCKINNELL:

Good morning. I'm Hank McKinnell, Chairman and CEO of Pfizer, speaking from our
Board Room in New York City. We welcome you to this call to discuss this
morning's news.

With me today is Fred Hassan, Chairman and Chief Executive Officer of Pharmacia
- - as well as senior executives from Pfizer, including: David Shedlarz, Executive
Vice President and CFO; Karen Katen, Executive Vice President and President,
Pfizer Pharmaceuticals Group; Peter Corr, Senior Vice President of Science and
Technology; and Jeff Kindler, Senior Vice President and General Counsel.


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This morning, Pfizer and Pharmacia announced a definitive agreement for Pfizer
to acquire Pharmacia in a stock-for-stock transaction.

During this conference call - we will discuss this transaction, our plans and
timetable for its implementation, and the opportunities it offers to expand our
business and increase shareholder value. And then, we will be happy to answer
questions.

We will also take any questions about our Second Quarter earnings release which,
because of this transaction, we issued this morning ... instead of on Wednesday
of this week, as originally announced.

And, I should also note that we will be having an analysts' meeting in New York
on Wednesday morning in order to provide additional information on both of these
topics. Invitations for that meeting are being sent out as we speak.

First, a few initial comments about the transaction  -

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These are challenging times in our industry.., not only for shareholders, but
for all of us. Nonetheless, as our results demonstrate, we have continued to
succeed - and have done so while many others in the industry have stumbled.

With this transaction, we will further enhance our leadership position in the
industry by combining two of the fastest - growing and most innovative global
pharmaceutical companies.

Plus - the transaction, we believe, will provide substantial benefits to
shareholders of both companies - in terms of improved financial returns and
accelerated earnings growth.

On a combined basis, we will have annual revenues for 2002 of approximately $48
billion, including approximately $39 billion in prescription pharmaceutical
sales.

And - our strategic fit is excellent. The combination brings together two young,
broad and complementary product portfolios; enhanced research and development
pipelines; and outstanding sales and marketing organizations.


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With this acquisition, we are positioning ourselves for long-term leadership in
a rapidly changing pharmaceutical industry.

Looking ahead - advances in medical understanding will increase the number of
drug discovery targets and create major opportunities for Pfizer. But, at the
same time, it is becoming increasingly costly to fund the high-risk and
long-term research that will be necessary. And, that is occurring while payers
and providers are increasingly demanding lower costs.

By combining with Pharmacia - we are ensuring that our core capabilities in the
discovery, development and commercialization of new medicines are uniformly
strong and efficient around the world.

With Pharmacia, we will have a product portfolio unequalled in its strength,
depth and patent protection; an even stronger new product pipeline; and the
scale to spread our products and R&D across a global marketing platform,
capitalizing on growth opportunities everywhere in the world.


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But, equally important, we will be better able to serve the millions of patients
that depend on us worldwide.

Our expanded capabilities will ensure that patients around the world will
continue to benefit from our skill in developing therapies for cancer, obesity,
cardiovascular disease, infectious diseases, mental illness, blindness and many
other serious medical conditions.

Simply put, Pfizer and Pharmacia are much stronger together than separately.

We are especially pleased to be merging with a company that, like Pfizer, is
known as an innovator and leader in our industry. We know Pharmacia well. And,
we have the greatest respect for the company, its people, and its many
accomplishments.

Working together, we have introduced Celebrex and Bextra for the treatment of
arthritis ... and have done so with great success. It has been a good and
productive partnership. And now, we are looking forward to building on that
relationship.


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In the end - this transaction is about creating value ... for patients and their
physicians, for payors, and for shareholders ... by helping us do what we do ...
better and more effectively.

As a result of today's announcement, we can look forward to significant and
exciting growth opportunities.

For example - with unified leadership, we can do more with the COX-2 franchise.
We can reinforce the promotion of key current Pharmacia products with Pfizer's
larger, and highly respected, sales force. We will have the capability to
accelerate product launches, maximize the potential of those new products, and
do so with an expanded global reach.

At the same time - we have unique opportunities to reduce many of the risks
inherent in our business.


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Together, we will each have even less dependence on our respective leading
products. We will be able to diversify into new therapeutic categories. And -
importantly - we will significantly reduce any intermediate-term patent
expiration exposure.

In sum - this is a major step forward for both Pfizer and Pharmacia ... one that
will keep us at the forefront of medical innovation for the foreseeable future.

With those introductory comments - I'm now pleased to introduce the Chairman and
CEO of Pharmacia, the Chairman of PhRMA, and my good friend ... Fred Hassan.

FRED HASSAN:

Thank you, Hank - and good morning everyone.

Combining Pharmacia with Pfizer is indeed a compelling strategic opportunity.


                                  Page 7 of 29

The competitive landscape in global pharmaceuticals is changing rapidly - and is
increasingly differentiating successful companies from those who are not. And,
this transaction immediately creates a global pharmaceutical company with all
the resources and capabilities to excel in such a challenging environment.

The company that will emerge from this transaction will be the clear leader in
the pharmaceutical industry for many years to come. The combination of broad
research and development capabilities, a rich pipeline, the largest sales force,
and the most impressive product portfolio in the industry will drive growth well
beyond what either company could have achieved separately.

In evaluating our alternatives, we at Pharmacia had become increasingly aware
that we simply did not have sufficient resources to fully leverage the growth of
our current in-line products ... while, at the same time, funding the
development of our pipeline.

It is important to emphasize that Pharmacia will be bringing its resources to
the table from Day One. As Hank has so


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correctly noted, our Celebrex/Bextra partnership has been extraordinarily
successful. As we've come to know Pfizer, it has become increasingly clear that
our companies are truly an excellent fit.

Pharmacia shareholders will receive not only an immediate premium for their
shares, but will have the opportunity to participate in Pfizer's long-term
growth ... as it leverages a strengthened product line and pipeline.

I am personally committed to making this transaction work, and to insure that
value creation does not end with this agreement.

As we move toward closing, all of us will be identifying, and refining, those
steps required for a seamless integration process.

HANK MCKINNELL:

Thank you, Fred.


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We look forward to working even more closely with you and your team over the
coming months. And, I greatly appreciate your willingness to work with me in
making this merger and integration a success.

I'll now ask David Shedlarz to review our financial performance and highlight
the terms of the agreement announced this morning. He will then be followed by
Karen Katen and Peter Corr.

DAVID SHEDLARZ:

Thank, you, Hank, and good morning, everyone.

Although I assume that your principal interest this morning is in the
transaction - I would like to take a few minutes to review with you our
financial results for the first half of 2002. And then, I will highlight the
financial aspects of our announced acquisition of Pharmacia.

The solid P&L performance that has characterized Pfizer continued in the first
half of 2002. Excluding the impact of foreign exchange and a 2001 accounting
harmonization for Medicaid and contract rebates - total company revenue for


                                 Page 10 of 29

the first half grew 11%. Human pharmaceutical revenue, on this same basis, was
up 12%.

Product support and R&D investment continued to be strong. Our R&D investment
for the first half totaled $2.4 billion - which we expect to lead the industry.

And, in the first half, income and diluted earnings per share from continuing
operations - excluding the cumulative effect of a change in accounting
principle, certain significant items and merger-related costs - grew 12% and
14%, respectively.

First half revenue growth was solid across all of Pfizer's core businesses.
Human pharmaceuticals, animal health and consumer healthcare all achieved
double-digit operational revenue growth.

Human pharmaceutical revenue growth in the first half was driven by 8 products -
representing 79% of our total human pharmaceutical revenues - that grew a
combined 15%.


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Pfizer's gross margin also continued to improve in the first half - with only a
1% increase in cost of sales.


                                 Page 12 of 29

Looking forward to the second half - we expect strong EPS growth, benefiting
from the unusual quarterly pattern of expenses in 2001 and a favorable impact
from foreign exchange. While we expect expense comparisons against the prior
year to continue to be challenging in the third quarter - we now estimate a
year-over-year decline in expenses in the fourth quarter.

Ongoing productivity initiatives and additional merger-related cost savings from
the Warner-Lambert merger will continue to drive profit margin improvement. We
now expect cost savings from the Warner-Lambert merger to be $1.8 billion by
year-end 2002, exceeding our original estimate by $200 million. And - we
anticipate our R&D investment will reach about $5.2 billion, an industry-leading
level. Additionally, we forecast a reduction in our effective tax rate to 23.5%
for the full year.


                                 Page 13 of 29

We have refined our estimate of diluted EPS - excluding the cumulative effect of
a change in accounting principle, certain significant items, and merger-related
costs, to $1.58, 21% growth over the prior year and within the range of earlier
guidance. On a stand-alone basis from 2002 to 2004, Pfizer expects compounded
revenue growth of 11% and diluted EPS growth of 16%.

In sum - as a stand-alone entity, Pfizer's financial prospects were, and are,
very bright.

Now - turning to the announced transaction....

As outlined in this morning's press release, the key terms of our agreement with
Pharmacia are as follows:


                                 Page 14 of 29

- -   After Pharmacia's spin-off to its shareholders of its remaining 84% interest
    in Monsanto, Pfizer will exchange 1.4 shares of Pfizer common stock for each
    outstanding share of Pharmacia stock. This will be a tax-free transaction,
    valued at $45.08 per Pharmacia share or $60 billion, based on Pfizer's July
    12th closing price of $32.20. This represents a 44% premium, based on the
    average closing prices of the two stocks over the last 30 days, adjusted for
    the Monsanto spin-off.

- -   Upon completion, Pfizer's shareholders will own approximately 77% of the
    combined company and Pharmacia's shareholders will own approximately 23%.

- -   The transaction is expected to close by year-end 2002, subject to the
    approval by shareholders of both companies, and customary governmental and
    regulatory approvals.


                                 Page 15 of 29

Excluding the effects of purchase accounting and merger-related expenses, the
transaction is expected to be non-dilutive to Pfizer's 2003 adjusted diluted
earnings per share (with adjusted earnings defined as net income in accordance
with Generally Accepted Accounting Principles in the U.S., excluding the
write-off of in-process R&D, amortization of intangibles, effect of the write-up
of assets to fair value, non-recurring costs, certain significant items and
merger-related costs.) And the transaction will be accretive to adjusted diluted
earnings per share in 2004 and thereafter.

As a result of the transaction, Pfizer will have significantly enhanced scale
and financial flexibility. The company will have combined annual revenues, on a
pro-forma basis, of $48 billion in 2002, growing on a compound annual basis by
10% to nearly $58 billion in 2004. Adjusted earnings, on a pro-forma basis in
2002, will be $11.9 billion, growing on a compound annual basis by 19% to nearly
$17 billion in 2004.


                                 Page 16 of 29

We expect to achieve substantial synergies in this combination, arising from
increased purchasing power of the combined entity, the reduction of operating
expenses and the closure of redundant facilities. We are targeting $1.4 billion
in synergies in 2003, increasing to $2.2 billion in 2004, and $2.5 billion in
2005. Our experience during the Warner-Lambert integration, which resulted in
the realization of synergies more quickly and of a greater magnitude than
originally foreseen, gives us strong confidence in our ability to meet these
merger-related cost savings.

Indicative of the exceptional financial strength of the company, we have
expanded our previously announced stock buyback program from $10 billion to $16
billion. This larger program is expected to be completed in 2003.

Earlier this morning - reflective of the powerful operational and financial
profile of the combined company - Standard & Poor's and Moody's confirmed our
Triple A long term debt ratings and A-1+/P-1 short-term debt ratings.


                                 Page 17 of 29

And now, it's my pleasure to introduce Karen Katen, President of Pfizer's global
pharmaceuticals business.

KAREN KATEN:

Thank you, David.

Today, Pfizer is the leading pharmaceutical company in the world with global
sales that well exceed our closest competitor. With the acquisition of
Pharmacia, we significantly enhance our position of industry leadership and
strength.

Beyond scale, the acquisition of Pharmacia provides us with access to new and
medically important categories. In addition, we will move from our current
fourth position in terms of sales rankings in Europe to first, from third to
first in Japan, and from fifth to first in Latin America.

Currently, Pfizer's product portfolio has significant breadth and depth across a
number of key categories, with eight billion dollar products in 2001 - and at
least that many expected in 2002 - the number one therapies in


                                 Page 18 of 29

cardiovascular disease, cholesterol, anti-infective, depression and
arthritis/pain. The combination of Pfizer and Pharmacia will create a company
with an unparalleled product portfolio - 14 number one products.

But, this acquisition is not just about adding products, it's also about the
complementary nature of our respective portfolios. Pharmacia will bring
innovative new therapies to our cardiovascular, CNS, and anti-infective
platforms, where we can optimize our industry leading medical-marketing and
sales expertise, as well as our solid customer relationships.

In areas where we don't have a presence, Pharmacia brings us products that
immediately provide a platform for incremental growth, as well as a base
platform for launch of the Pfizer near and longer-term pipeline products. In
ophthalmology, Xalatan from Pharmacia lowers eye ocular pressure in patients
with open-angle glaucoma, not controlled by other medications. This
revolutionary treatment for glaucoma is now the leading ophthalmic prescription
medicine in the world.


                                 Page 19 of 29

In oncology, Pharmacia's current franchise includes Camptosar, the first-line
treatment for colorectal cancer, as well as Ellence and Aromasin for breast
cancer. Aromasin was approved just last week in Japan. These products combined
with our own oncology pipeline will ultimately give us a presence in this
medically important therapeutic category.

A highlight for the future is Pharmacia's future agent for hypertension and
potentially heart failure, eplerenone, with the first launch expected in 2003.

As you all know, one of the most important components of Pharmacia is the COX-2
franchise. Together, through our partnership, Pfizer and Pharmacia have built an
impressive track record in the COX-2 area - first with the most successful
launch in the pharmaceutical industry of Celebrex, followed by the recent launch
of Bextra.

In 1999, Pfizer and Pharmacia jointly introduced the anti-inflammatory Celebrex,
the first-in-class COX-2 inhibitor. This medicine has become the number-one
branded treatment for arthritis in the world and it has been prescribed


                                 Page 20 of 29

to more than 35 million patients. With its recent approval in the U.S. for acute
pain and dysmenorrhea, Celebrex has the most complete range of approved
indications among COX-2 inhibitors on the market today.

Over 6,000 Pfizer and Pharmacia sales representatives began promoting a second
COX-2 inhibitor, Bextra, in April.

Bextra is approved for the treatment of osteoarthritis, adult rheumatoid
arthritis and the pain associated with menstrual cramping.

Together, Celebrex and Bextra now account for 23.6% of new NSAID prescriptions,
growing 26% since January. During the same January to May period, Vioxx share of
new prescriptions declined by 14% to a market share of 16.0%.

Further fueling the growth of our COX-2 franchise are the launches of Bextra and
Dynastat (the first injectable COX-2 inhibitor) in a number of international
markets. Pharmacia is currently seeking FDA approval for Dynastat in the U.S.


                                 Page 21 of 29

The acquisition will allow Pfizer to better utilize our strengths and address
the challenges in the COX-2 category through:

    -   Complete alignment and full execution of high performance strategies;

    -   Increased speed and sharpened focus of a single management team;

    -   Effective investment in clinical development projects while we eliminate
        overlap in field and marketing efforts.

Additionally, there are several factors we expect could drive continued growth
in this category:

    -   The large number of undiagnosed and untreated patients;

    -   The continuing large market share of NSAIDs and the large number of
        dissatisfied NSAID patients;


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    -   The delayed entry of Merck's Arcoxia;

    -   Celebrex's recently approved pain indication.

Beyond the advantage of portfolio enhancement, future patent protection, on a
combined basis, is also a positive factor to consider in this acquisition.
Pfizer's major products are patent-protected to the end of this decade and
beyond. For example, the U.S. patents for Lipitor and Viagra run through 2010
and 2011, respectively. Pharmacia patents also expire mostly after 2010.

All in all - this is a unique opportunity to build on our strengths, enhance our
growth and reinforce our commitment to serving customers and patients worldwide.

I am enthusiastic about the many productive opportunities - only some of which
we've highlighted this morning - that will be made possible by this acquisition.

And now, Peter Corr, Head of Science and Technology ... will comment from the
research and development perspective.


                                 Page 23 of 29

PETER CORR:

Thank you, Karen.

Pfizer alone has a broad and robust R&D pipeline that contains 68 new product
enhancements plus 94 new molecular entities - for a total of 162 ongoing
projects in development. And we have over 300 projects in worldwide discovery.

We have five new chemical entities recently approved or undergoing regulatory
review in the U.S. and/or the European Union: Vfend; Geodon; Bextra (discovered
and developed by Pharmacia); Spiriva (discovered and developed by Boehringer
Ingelheim); and Relpax. All five products, by the way, are expected to be
launched in new markets this year.

And, Pfizer anticipates completing regulatory filings in 2002 for pregabalin in
neuropathic pain, epilepsy, generalized anxiety disorders; and darifenacin for
use in treating overactive bladder.


                                 Page 24 of 29

In addition, advanced-stage clinical studies are continuing for, among others:

    -   Exubera, an inhalable form of insulin under co-development,
        co-manufacture, and co-marketing with Aventis, with the participation of
        Inhale Therapeutic Systems, for the treatment of both type 1 and type 2
        diabetes;

    -   and the dual therapy combining Lipitor and Norvasc, the world's leading
        cholesterol-lowering and antihypertensive medicines.

To that - one can now add Pharmacia's strong late-stage pipeline, including
candidates such as epleronone for hypertension and heart failure, and CDP-870
for rheumatoid arthritis, which both complement Pfizer's existing product
portfolio. The result: we will be able to better utilize our worldwide R&D
strength against a broader range of high-potential compounds.

As mentioned by Karen - we will also expand our presence in major therapeutic
categories, including the addition of a strong oncology and ophthalmology
commercial business to


                                 Page 25 of 29

the two companies' existing R&D programs in these important therapeutic areas.

This expansion of our therapeutic range is an important opportunity. Pfizer's
global scientific and medical infrastructure puts us in an excellent position to
capitalize on the many exciting opportunities we anticipate in this great era of
scientific discovery. These include the emergence of new genetic knowledge and
the application of new technologies, not only in discovery but also in clinical
research.

Currently, Pfizer expects to file 15 new drug applications with global
regulatory authorities over the next four-and-a-half years. Based on our current
assessment of Pharmacia's late stage pipeline, we anticipate 5 to 7 major New
Chemical Entity filings from 2002 through 2004.

These include treatments for cardiovascular disease, CNS disorders, eye disease,
and arthritis. At the present time, Pharmacia has 18 NCEs in human clinical
studies with additional NCEs moving toward initial clinical studies over the
next 6 to 12 months.


                                 Page 26 of 29

From my perspective - the research platform for Pfizer combined with Pharmacia
is nothing less than extraordinary ... with breadth and depth across all major
therapeutic categories.

For 2002, Pfizer expects to invest about $5.2 billion in R&D and Pharmacia
expects to invest $2.3 billion. This means that the companies' current combined
R&D investment for 2002 exceeds $7 billion - exceeding our nearest competitor by
about 50 percent.

And, with the integration of Pharmacia, Pfizer will have an R&D pipeline
containing nearly 120 new molecular entities in development ...plus well over 80
distinct development projects for product enhancements, including new
indications. Overall, this results in nearly 200 ongoing development projects.

This transaction will also permit Pfizer financial flexibility essential to
sustained growth. We will be able to expand our discovery capabilities and, at
the same time, to adequately


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fund our growing late stage pipeline with a doubling of phase 3 programs over
the next 15 months.

And now - back to Hank.

HANK MCKINNELL:

Thank you, Peter...

For the past decade, Pfizer has consistently delivered strong performance. At
the same time - we have continued to look for innovative ways to move `beyond
number one' ... to become the most valued company in the world for all our
constituencies, including investors.

Today's agreement is an important milestone in our pursuit of that objective ...
and in Pfizer's 153-year history.

A decision of this magnitude occurs only after very careful consideration by all
involved. I can assure you that this is truly a strategic acquisition - one that
creates a "new standard, for a new era" - and lasting value for Pfizer and
Pharmacia shareholders.


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And now, we will take questions from those analysts covering Pfizer....

[Q&A PROCEDURES: THE OPERATOR WILL THEN ANNOUNCE: "YOUR FIRST ANALYST QUESTION
IS FROM [NAME] OF [FIRM]." AFTER COMPLETION OF EACH Q&A, HANK MCKINNELL WILL SAY
"NEXT QUESTION, PLEASE" AND THE OPERATOR WILL INTRODUCE THE QUESTIONER. TO
SIGNAL THE LAST QUESTIONER, HANK MCKINNELL WILL SAY: "AND NOW FOR OUR LAST
QUESTION."]

HANK MCKINNELL:

With that question - we conclude today's conference call. Thank you for being
with us on this very special and exciting occasion.

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Safe Harbor Statement

This release contains certain "forward-looking" statements within the meaning of
the Private Securities Litigation Reform Act of 1995. These statements are based
on management's current expectation and are naturally subject to uncertainty and
changes in circumstances. Actual results may vary materially from the
expectations contained herein. The forward-looking statements contained herein
include statements about future financial operating results and benefits of the
pending merger between Pfizer Inc. and Pharmacia Corp. Factors that could cause
actual results to differ materially from those described herein include: the
inability to obtain shareholder or regulatory approvals; actions of the U.S.,
foreign and local governments; the inability to successfully integrate the
businesses of Pfizer Inc. and Pharmacia Corp.; costs related to the merger; the
inability to achieve cost-cutting synergies resulting from the merger; changing
consumer or marketplace trends: and the general economic environment. Neither
Pfizer Inc. nor Pharmacia Corp. is under any obligation to (and expressly
disclaims any such obligation to) update or alter its forward-looking
statements, whether as a result of new information, future events, or otherwise.

We urge investors to read the Proxy Statement/Prospectus and any other relevant
documents that Pfizer Inc. and Pharmacia Corp. have filed and will file with the
Securities and Exchange Commission because they contain important information.

Pfizer and Pharmacia will file a proxy statement/prospectus and other relevant
documents concerning the proposed merger transaction with the SEC. INVESTORS ARE
URGED TO READ THE PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE AND ANY
OTHER RELEVANT DOCUMENTS FILED WITH THE SEC BECAUSE THEY WILL CONTAIN IMPORTANT
INFORMATION. You will be able to obtain the documents free of charge at the
website maintained by the SEC at www.sec.gov. In addition, you may obtain
documents filed with the SEC by Pfizer free of charge by requesting them in
writing from Pfizer Inc., 235 42nd Street, New York, New York 10017, Attention:
Investor Relations, telephone: (212) 573-2668. You may obtain documents filed
with the SEC

by Pharmacia free of charge by requesting them in writing from Pharmacia
Investor Relations, Route 206 North, Peapack, New Jersey 07977, or by telephone
at (908) 901-8000.

Pfizer and Pharmacia, and their respective directors and executive officers and
other members of their management and employees, may be deemed to be
participants in the solicitation of proxies from the stockholders of Pfizer and
Pharmacia in connection with the merger. Information about the directors and
executive officers of Pfizer and their ownership of Pfizer shares is set forth
in the proxy statement for Pfizer's 2002 annual meeting of shareholders.
Information about the directors and executive officers of Pharmacia and their
ownership of Pharmacia stock is set forth in the proxy statement for Pharmacia's
2002 annual meeting of stockholders. Investors may obtain additional information
regarding the interests of such participants by reading the proxy
statement/prospectus when its becomes available.