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PF-04457845, FAAH inhibitor

Phase 2

Osteoarthritis, Knee | Small molecule | Musculoskeletal |Pfizer, Inc.|Last Updated: Sep 19, 2017

Target and mechanism

ModalitySmall molecule

Also known as PF-04457845

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment76

FDA Designations

No designations recorded

Clinical trial landscape

PF-04457845, FAAH inhibitor · 3 trials · 4 indications

Phase 2 1Phase 1 2
NCT00981357A Study To Investigate Whether PF-04457845 Is Effective In Treating Pain, Is Safe And Tolerable In Patients With Osteoarthritis Of The KneeOsteoarthritis, Knee
COMPLETED76 Analytics
PHASE2COMPLETED
A Study To Investigate Whether PF-04457845 Is Effective In Treating Pain, Is Safe And Tolerable In Patients With Osteoarthritis Of The Knee
Osteoarthritis, KneeUnlock trial analytics

Study Endpoints

Primary Endpoints

To evaluate the efficacy of PF-04457845 (administered QD) versus placebo in relieving pain as measured by the WOMAC Pain sub-score in patients with osteoarthritis of the knee
8 weeks
To evaluate the safety and tolerability of PF-04457845 in patients with osteoarthritis.
10 weeks
Plasma pharmacokinetics
up to 96 hours post dose
To characterize the multiple-dose pharmacokinetics of PF-04457845.
14 Days
To characterize the relationship between PF-04457845 and the level of anandamide and level of FAAH enzyme inhibition in healthy adult volunteers following multiple dosing.
14 Days
To evaluate the safety and tolerability of multiple oral doses of PF-04457845.
14 Days
To determine the effect on food on PF-04457845 pharmacokinetics following administration of single doses of 4mg and 8mg.
7-14 Days
To determine the effect on food on PF-04457845 safety following administration of single doses of 4mg and 8mg.
7-14 Days

Secondary Endpoints

Efficacy of PF-04457845 (administered QD) versus placebo as measured by the WOMAC Stiffness domain score (Likert scale for 2 items, overall score ranges from 0-8) in patients with osteoarthritis of the knee.
8 weeks
Efficacy of PF-04457845 (administered QD) versus placebo as measured by the WOMAC Physical Function domain score (Likert scale for 17 items, overall score ranges from 0-68) in patients with osteoarthritis of the knee.
8 weeks
Efficacy of PF-04457845 (administered QD) versus placebo as measured by the WOMAC Total Score in patients with osteoarthritis of the knee.
8 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelCROSSOVER
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PF-04457845 followed by placeboEXPERIMENTAL -
Placebo followed by PF-04457845EXPERIMENTAL -
Naproxen followed by placeboACTIVE_COMPARATOR -
Placebo followed by NaproxenACTIVE_COMPARATOR -
Healthy adult volunteersEXPERIMENTALStandard Phase 1 normal healthy adult volunteers, age range 21-55 years and of either sex
Cohort 1 (N=10)EXPERIMENTALPlacebo-controlled, escalating multiple doses of 0.5mg per day for 14 days.
Cohort 2 (N=10)EXPERIMENTALPlacebo-controlled, escalating multiple doses of 1mg per day for 14 days.
Cohort 3 (N=10)EXPERIMENTALPlacebo-controlled, escalating multiple doses of 4mg per day for 14 days.
Cohort 4 (N=10)EXPERIMENTALPlacebo-controlled, escalating multiple doses of 8mg per day for 14 days.

Interventions

NameTypeDescription
PF-04457845DRUGPF-04457845 4 mg tablet once daily / matched placebo
NaproxenDRUGNaproxen 500 mg tablet twice daily / matched placebo
PF-04457845, FAAH inhibitorDRUGOral solution of 0.5mg given once daily for 14 days.
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Subjects must have a diagnosis of Osteoarthritis (OA) of the knee confirmed by X-ray * Subjects must be willing and able to stop all current pain therapy for the duration of study. (Limited and specific pain therapy will be available throughout the study) * Subjects can be mal...

Countries:United StatesCanadaSwedenSingapore
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Competitive Landscape -Osteoarthritis 115 trials (matched to "Osteoarthritis, Knee")

Frequently asked questions about PF-04457845, FAAH inhibitor

What is PF-04457845?

PF-04457845 is an investigational small molecule developed by Pfizer, Inc. (NYSE: PFE) for the treatment of pain. It has been studied in acute pain and in osteoarthritis of the knee, and it is also known as PF-04457845. It is a clinical-stage candidate that has not been approved for any indication.

What is PF-04457845 used for?

PF-04457845 has been studied for the treatment of pain, including acute pain and osteoarthritis of the knee. Clinical testing has also been conducted in healthy volunteers to assess its safety, tolerability, pharmacokinetics, and pharmacodynamics. It is an investigational agent and is not approved for use in any indication.

Who makes PF-04457845?

PF-04457845 is developed by Pfizer, Inc., which trades on the New York Stock Exchange under the ticker PFE. Pfizer sponsored the clinical trials evaluating the compound in healthy volunteers and in patients with osteoarthritis of the knee. The drug remains an investigational asset in Pfizer's pain research portfolio.

What phase is PF-04457845 in?

PF-04457845 is in clinical development, with Phase 1 studies completed in healthy volunteers and a Phase 2 study completed in patients with osteoarthritis of the knee. It is an investigational drug and has not been approved by the FDA or any other regulatory authority for commercial use.

What clinical trials is PF-04457845 in?

PF-04457845 has been evaluated in completed trials including NCT00981357, a Phase 2 study in osteoarthritis of the knee conducted in the United States, Canada, and Sweden, and two Phase 1 studies, NCT00918164 and NCT00836082, in healthy volunteers in Singapore. No trials of PF-04457845 are currently active.