Form 425
1
Joseph A. Mollica, Chairman of the Board,
Interim President & CEO
Pharmacopeia
John L. Higgins, President & CEO
Ligand Pharmaceuticals
The Oppenheimer 19th Annual Healthcare Conference
New York City, November 3, 2008
Filed by
Ligand
Pharmaceuticals
Incorporated
Pursuant to Rule 425
under the Securities Act of 1933 and
deemed filed pursuant to Rule 14a-6 under
the Securities Exchange Act of 1934, as amended
Subject Company: Pharmacopeia, Inc.
Commission File No: 0-50523


Joseph A. Mollica, Chairman of the Board,
Interim President & CEO
Discovering excellence, driving clinical success
TM


3
This presentation, and oral statements made with respect to information contained in this
presentation, constitute forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995. Such forward-looking statements include those which express
plan, anticipation, intent, goal, contingency or future development and/or otherwise are not
statements of historical fact. These statements are based upon management's current
expectations and are subject to risks and uncertainties, known and unknown, which could
cause actual results and developments to differ materially from those expressed or implied in
such statements. These forward-looking statements include, but are not limited to, statements
about the successful implementation of Pharmacopeia's strategic plans and the merger
transaction between Pharmacopeia and Ligand Pharmaceuticals.  Further information about
these
and
other
relevant
risks
and
uncertainties
may
be
found
in
Pharmacopeia’s
Reports
on
Form 8-K, 10-Q and 10-K filed with the U.S. Securities and Exchange Commission.
Pharmacopeia urges you to carefully review and consider the disclosures found in its filings
which
are
available
in
the
SEC
EDGAR
database
at
http://www.sec.gov
and
from
Pharmacopeia at http://www.pharmacopeia.com. All forward-looking statements in this
presentation and oral statements made with respect to information contained in this
presentation
are
qualified
entirely
by
the
cautionary
statements
included
in
this
presentation
and such filings. These risks and uncertainties could cause actual results to differ materially
from results expressed or implied by such forward-looking statements. These forward-looking
statements speak only as of the date of this presentation. Pharmacopeia undertakes no
obligation to (and expressly disclaims any such obligation to) publicly update or revise the
statements made herein or the risk factors that may relate thereto whether as a result of new
information, future events, or otherwise.
Forward-Looking Statements


4
Pharmacopeia/Ligand Merger
Merger announced on September 24, 2008
Expected to close Q4 2008/January 2009
Pharmacopeia shareholders benefit from any growth of
combined company
Exciting combined portfolio with significant royalty potential
Premium over Pharmacopeia stock price, including further
upside through CVR if DARA is partnered
Pharmacopeia financing risk removed


5
Combined Product Pipeline
Stage of Development
Product
Indication
Partner
Preclinical
Phase I
Phase II
Phase III / NDA
Marketed
AVINZA ®
Chronic pain
King Pharmaceuticals
PROMACTA™
ITP, Hep C, CLD, CIT
GlaxoSmithKline
VIVIANT™
/ APRELA™
Osteoporosis
Wyeth
FABLYN®
Osteoporosis
Pfizer
PS433540
DARA / Cardiovascular
NA
PS291822
COPD (CXCR2)
Schering-Plough
PS540446
Psoriasis / RA (p38)
Bristol-Myers Squibb
LGD-4665
Thrombocytopenia
NA
PS178990
Muscle Wasting (SARM)
NA
PS095760
Oncology
Schering-Plough
PS386113
Inflammation
Schering-Plough
PS948115
Respiratory
Schering-Plough
PS248288
Metabolic Diseases
Schering-Plough
PS873266
Inflammation
Celgene
LGD-4033
Muscle Wasting (SARM)
NA
Erythropoietin (EPO)
Anemia
NA
AIPC
Prostate Cancer
NA
PS031291
Arthritis/MS (CCR1)
NA
Ligand Products
PS015146
Undisclosed
Schering-Plough
Pharmacopeia Products
SGRM
Inflammation & Cancer
NA


John L. Higgins, President & CEO
Ligand Pharmaceuticals


7
Safe Harbor Statement
The following presentation contains forward-looking statements regarding the proposed
acquisition of Pharmacopeia by Ligand, including projections regarding expectations for
potential research and development payments, savings in operational costs, cash burn rates,
timing of achieving positive cash flow, and potential revenue and profits of a combined
company.
The forward looking statements made in the presentation are subject to several risk factors,
including, but not limited to the reliance on collaborative partners for milestone and royalty
payments, regulatory hurdles facing product candidates, uncertain product development
costs, disputes regarding ownership of intellectual property, the commercial success of
approved products. The failure of Pharmacopeia’s stockholders to approve the merger,
Ligand’s
or
Pharmacopeia’s
inability
to
satisfy
the
conditions
of
the
merger,
or
that
the
merger
is otherwise delayed or ultimately not consummated, and a failure of the combined
businesses to be integrated successfully.  Additional risks may apply to forward looking
statements made in this presentation.
The
risk
factors
facing
Ligand
and
Pharmacopeia
are
explained
in
greater
detail
in
the
Company’s and Pharmacopeia’s filings with the SEC, including the most recently filed annual
reports on Form 10-K and quarterly reports on Form 10-Q, as well as other public filings.


8
Additional Information and Where to Find It
Ligand filed on October 20, 2008, the SEC a preliminary Registration Statement on Form S-4, which includes a proxy
statement of Pharmacopeia and other relevant materials in connection with the proposed transaction. Once, finalized, the
proxy statement will be mailed to the stockholders of Pharmacopeia. Investors and security holders of Pharmacopeia are
urged to read the proxy statement and the other relevant materials when they become available because they will contain
important information about Ligand, Pharmacopeia and the proposed transaction. The proxy statement and other relevant
materials (when they become available), and any other documents filed by Ligand or Pharmacopeia with the SEC, may be
obtained free of charge at the SEC's web site at www.sec.gov. In addition, investors and security holders may obtain free
copies
of
the
documents
filed
with
the
SEC
by
Ligand
by
going
to
Ligand’s
Investor
Relations
website
at
www.ligand.com.
Investors and security holders may obtain free copies of the documents filed with the SEC by Pharmacopeia by going to
Pharmacopeia’s Investor Relations page on its corporate website at www.pharmacopeia.com. Investors and security holders
of Pharmacopeia are urged to read the proxy statement and the other relevant materials when they become available before
making any voting or investment decision with respect to the proposed transaction.
Ligand and its respective directors and executive officers may be deemed to be participants in the solicitation of proxies from
the
stockholders
of
Pharmacopeia
in
favor
of
the
proposed
transaction.
Information
concerning
Ligand’s
directors
and
executive
officers
is
set
forth
in
Ligand’s
proxy
statement
for
its
2008
annual
meeting
of
shareholders,
which
was
filed
with
the SEC on April 29, 2008, and annual report on Form 10-K filed with the SEC on March 5, 2008.
Pharmacopeia
and
its
respective
directors
and
executive
officers
may
be
deemed
to
be
participants
in
the
solicitation
of
proxies from the stockholders of Pharmacopeia in favor of the proposed transaction. Information about Pharmacopeia’s
executive officers and directors and their ownership of Pharmacopeia common stock is set forth in the proxy statement for
the Pharmacopeia 2008 annual meeting of shareholders, which was filed with the SEC on March 24, 2008. Investors and
security holders may obtain more detailed information regarding the direct and indirect interests of Pharmacopeia and its
respective executive officers and directors in the acquisition by reading the proxy statement regarding the merger, which will
be filed with the SEC.


9
Why are we Acquiring Pharmacopeia?
Royalty partnerships
Drug discovery platform
Partnerable
assets
Cash and tax assets


10
Vision for the Combined Companies
Consolidated operations with strong fundamentals
Strong balance sheet
Cost-efficient R&D business with spending discipline
Robust product pipeline 
Diverse royalty partnerships with promising potential revenue and profits
Leverage highly successful drug discovery capabilities of both companies
Focus on early stage drug discovery and development
Partner pipeline assets at earliest value inflection point
Leadership
focused
on
shareholders,
market
credibility
and
solid
foundation
Commitment to driving shareholder value and to transparency on the business with
goal to drive strong cash flow and earnings


11
Combined Revenue Sources
AVINZA royalties
Potential royalties from three pending NDA’s and future registrations in
expanded indications
PROMACTA (GSK)
FABLYN (Pfizer)
VIVIANT (Wyeth)
APRELA NDA submission expected in 2009 (Wyeth)
Milestone and Research Payments from existing Pharmacopeia
partnerships
$6.5 to $25 million potential in 2009
Potential new license payments from pipeline assets
SARM, TPO, Oral EPO, SGRM, DARA, CCR1, JAK3


12
Combined company will have one of the strongest, most diverse royalty
partnership rosters in the small cap biotech universe
Significant Value in Royalty Partnerships
Numerous deals with nine pharmaceutical companies
Over 15 programs in various stages of research and development
in partnership portfolio
More than 20 different therapeutic indications being pursued including the largest
untapped markets
Muscle wasting, COPD, thrombocytopenia, asthma
More than $400 million in potential R&D and milestone payments from existing
deals


13
Ligand’s
Plan for DARA
Current 2009 plan
Finish Phase
IIb
trial;
spend
minimal
amount
to
complete
study
Evaluate partnerability
of DARA by focusing on:
Quality of data
Time and cost to develop drug and get it to market
Patent extension options
Terms of DARA agreement with BMS
Interest level conveyed by
past partnering discussions


14
Pro Forma Financial Forecast
Given our current outlook on the combined businesses, 2009 pro forma operating
cash burn rate is expected to be $20 million
Potential for additional revenue and cash infusion from new license agreements
More than $350 million in potential Net Operating Loss carry-forwards before any
limitations
Robustly capitalized company that has sufficient cash
to make it to profitability without additional financings


15
Strong Research Platforms
Mainly GPCR, kinase, ion channel, other
targets
Exclusively nuclear and cytokine
receptor targets
Targets
Combinatorial chemistry compound library
Over 7 million compound screening deck
Discrete compounds
100,000 compound library
Chemistry
Broad approach similar to Big Pharma:
-High-throughput & Ultra-HTS Screening
Focused expertise:
-Cell-based assays
-Gene transcription
Screening
Pharmacopeia
Ligand
Highly complementary research technology  
Transaction combines two successful discovery platforms and
integrates strong biology and chemistry capabilities


16
Opportunities
and Benefits to Shareholders
Ligand shareholders gain access to:
Numerous royalty partnerships
Pipeline assets
Drug discovery assets
Cash and NOLs
Pharmacopeia shareholders will participate in:
Lucrative potential near-term royalties
Well capitalized company with no anticipated financing needs
Expanded product pipeline
Financial liquidity


17
Overview of Ligand’s
Partnerships


18
Major Collaborations
1997 drug discovery collaboration resulted in
eltrombopag
(PROMACTA) –
small molecule
TPO mimetic
ITP: Numerous clinical studies tested, data
published in NEJM, NDA pending approval
(16-0 panel vote in favor of drug)
Hepatitis C: Two Phase III trials were initiated
in 4Q:07, Phase II Hep C data published in
the NEJM
CIT: Chemotherapy-induced
thrombocytopenia Phase II ongoing
Sarcoma: Phase I trial
&


19
Thrombocytopenia -
Causes of Disease
Decreased production of platelets
Myelodysplastic syndrome
Hepatitis C
Cancer in the bone marrow (leukemia)
Aplastic anemia
Increased destruction of platelets
Autoimmune, such as ITP
Sequestration in the spleen
Drug-induced
Myelosuppression by chemotherapy regimens
Anti-virals in Hep C therapies
Thrombocytopenia is a condition in which there is an abnormally low level of
platelets in the blood. 
Regardless of the underlying cause, thrombocytopenia leads to decreased platelet counts,
which puts patients at greater risk for bleeding and serious adverse events.


20
Medical Significance of Thrombocytopenia (US)
(Estimated markets)
Potential
Treatable
Patients
ITP
~100,000
Hepatitis C
~120,000
Myelodysplastic syndrome
~20,000
Leukemia / lymphoma
~50,000
Chemotherapy induced thrombocytopenia
~140,000
Intensive
care
unit
acquired
~500,000
Bone marrow transplants
~50,000
Lupus
~100,000
Cirrhosis
~113,000
HIV/other
~600,000
~ 2 million platelet transfusions per year


21
Illustrative Cost for Blood-Related Treatments
Annual
Cost
of
Care
Pharmaceuticals
~$15,000 (annual cost of care)
Splenectomy
$48,000 (procedure and medical management)
Platelet Transfusion
Single Course
$4,000
Leukemia
$84,000 (2 to 4 weeks daily)
Bone Marrow Transplant
$140,000 (4 to 6 weeks daily)
Chemotherapy
$20,000 (5 cycles)
NPlate
*$55,000
References: USRDS, 2005. DrugStore.com, Blood 108:481B-482B, 2006
American Red Cross, Transfusion of Plateles: Current Issues, Medical and Scientific Updates, No 98-6.
*Cost of therapy will be significantly higher if increased dose is needed; Cowen & Company Analyst Report,
August 29, 2008


22
SERM Collaborations
Ligand has two partnerships around
Selective Estrogen Receptor Modulators (SERMs):
Wyeth
Pfizer
SERMs bind with estrogen receptors in a tissue-specific manner:
Exhibit estrogen action in some tissues and anti-estrogen
action in other tissues
Deliver benefits of estrogen in desirable tissues without
the negative side effects
Potential target markets: osteoporosis, vaginal atrophy and
vasomotor symptoms of menopause


23
SERM Collaborations
&
Bazedoxifene (VIVIANT) Monotherapy:   
Received third FDA approvable letter for osteoporosis
in May 2008
Expects to file complete response with FDA by year-end
Submitted NDA for osteoporosis treatment in 3Q:07 
Submitted MAA for osteoporosis prevention &             
treatment in 3Q:07
Bazedoxifene in Combination with Premarin CE (APRELA):
FDA Meeting in February 2008 discussed product
formulation, bioequivalence and clinical study
efforts to support the planned NDA filing.
NDA planned by 2H:09


24
SERM Collaborations
Lasofoxifene (FABLYN) for osteoporosis
treatment
NDA pending approval; FDA Extended Review
through January 2009
FDA Panel had positive vote (9-3) on
September 8, 2008 that benefits could
outweigh its risks, including blood clots and
vaginal bleeding for the osteoporosis treatment
indication for FABLYN
&


25
SARM
Selective Androgen Receptor Modulators


26
SARM Program
Androgens (e.g. testosterone) are steroids that play key roles in bone,
skeletal muscle and libido
Current androgenic drugs have disadvantages that significantly limit their
use
Non-selective stimulation of all androgen receptors
Inconvenient formulations –
injectable or topical
Available oral drugs have potential for hepatotoxicity
Ligand’s lead SARMs LGD-3303 and LGD-4033:
Tissue-selective for bone and muscle while sparing the prostate
Orally active
In preclinical development and expected IND filing in 4Q08
Target Indications:
osteoporosis, frailty, hypogonadism,                        
sexual dysfunction, cachexia
Market Need
Convenient, prostate-sparing androgen receptor modulator with activity
in bone, muscle and CNS


27
BMD
Muscle
Mass
SARMs Address a Major Unmet Need
Approximately 1/3 of Older Adults
have low muscle mass and
low bone mineral density
Revue de Medecine Interne 2000; 21:608,
Molecular Aspects Med. 2005; 26:818
Healthy Elderly
Elderly with
Serious Disease
Epidemiology of Aging
Ligand SARM Repletes
Muscle and Bone Loss
Increased falls
Increased risk of fractures
Normal Level
Hormone Deficient


28
EPO Mimetic Program


29
Oral EPO Mimetics Will Provide New Therapeutic Options
to Patients
Research-stage program to discover non-peptide, small molecule oral agonists
Builds upon our recent success in discovering TPO mimetic drugs
Current recombinant EPO proteins and the EPO receptor synthetic peptides in
development
All require injection
Minimal differentiation of products results in limited therapeutic option
Oral HIF Prolyl Hydroxylase inhibitors in development have the potential for
mechanism-based toxicity
HIF-induced angiogenesis is a risk
Oral EPO mimetics will potentially provide targeted activation of the EPO
signaling pathway with an oral dosing route


30
TPO Mimetic Program


31
Ligand TPO Mimetic Program
The goal to develop best-in-class molecules to stimulate the
production of platelets focused on:
Potency
Onset of action
Safety
Oral dosing flexibility
Ligand’s lead molecule, LGD-4665 has a promising efficacy and
safety profile
Ligand is developing a robust library of next generation
compounds


32
LGD-4665 Summary
LGD-4665 is approximately 10 times more potent than
eltrombopag based on published data
The drug was safe and well tolerated in Phase I studies
The strong efficacy, good safety and long half-life may permit
weekly dosing regimen
Conducting numerous pharmacology studies, to establish drug
activity and differentiate drug profile from other TPO mimetic drug
candidates
Conducting Phase II ITP trial


33
Combined Product Pipeline
Stage of Development
Product
Indication
Partner
Preclinical
Phase I
Phase II
Phase III / NDA
Marketed
AVINZA ®
Chronic pain
King Pharmaceuticals
PROMACTA™
ITP, Hep C, CLD, CIT
GlaxoSmithKline
VIVIANT™
/ APRELA™
Osteoporosis
Wyeth
FABLYN®
Osteoporosis
Pfizer
PS433540
DARA / Cardiovascular
NA
PS291822
COPD (CXCR2)
Schering-Plough
PS540446
Psoriasis / RA (p38)
Bristol-Myers Squibb
LGD-4665
Thrombocytopenia
NA
PS178990
Muscle Wasting (SARM)
NA
PS095760
Oncology
Schering-Plough
PS386113
Inflammation
Schering-Plough
PS948115
Respiratory
Schering-Plough
PS248288
Metabolic Diseases
Schering-Plough
PS873266
Inflammation
Celgene
LGD-4033
Muscle Wasting (SARM)
NA
Erythropoietin (EPO)
Anemia
NA
AIPC
Prostate Cancer
NA
PS031291
Arthritis/MS (CCR1)
NA
Ligand Products
PS015146
Undisclosed
Schering-Plough
Pharmacopeia Products
SGRM
Inflammation & Cancer
NA


34
Near-Term Milestone and Events Calendar
1Q 09
FABLYN FDA Action
1Q 09
Phase IIb
DARA
4Q 08
Completion of SP CXCR2 Trial in COPD
1Q 09
VIVIANT FDA Action
4Q 08
Phase II ITP Interim Data
Projected Timing
Development and Regulatory Events
Ligand SARM IND Submission
PROMACTA FDA Action
4Q 08
Anytime?