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TEPEZZA

Phase 4FDA approved 2020

Undisclosed | Small molecule | Other |Amgen Inc.|Trials Updated: Jul 7, 2026

TEPEZZA development status

FDA approval Jan 21, 2020
Approval holderHorizon Therapeutics Ireland
ApplicationBLA761143
Highest phase Phase 4 (NCT04583735)
Phase scored for AMGNPhase 1
Registered trials 14 across 1 sponsor since Jun 2013

Label indication TEPEZZA is indicated for the treatment of Thyroid Eye Disease regardless of Thyroid Eye Disease activity or duration. TEPEZZA is an insulin-like growth factor-1 receptor inhibitor indicated for the treatment of Thyroid Eye Disease ( 1 ) FDA label

TEPEZZA target and mechanism

ModalitySmall molecule

Also known as HZN-001, Teprotumumab, Teprotumumab-trbw, AMG 632

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials7
Total Enrollment369

FDA Designations

No designations recorded

TEPEZZA clinical trials

TEPEZZA · 7 trials · 7 indications

Phase 3 3Phase 2 1Phase 1 3
NCT06248619A Trial to Investigate Teprotumumab Subcutaneous Administration Compared With Placebo in Male and Female Adult Participants With Moderate-to-severe Active Thyroid Eye DiseaseThyroid Eye Disease
ACTIVE NOT_RECRUITING89 Analytics
NCT03461211Treatment of Graves' Orbitopathy to Reduce Proptosis With Teprotumumab Infusions in an Open-Label Clinical Extension StudyThyroid Eye Disease
COMPLETED51 Analytics
NCT03298867Treatment of Graves' Orbitopathy (Thyroid Eye Disease) to Reduce Proptosis With Teprotumumab Infusions in a Randomized, Placebo-Controlled, Clinical StudyThyroid Eye Disease
COMPLETED83 Analytics
PHASE3ACTIVE NOT_RECRUITING
A Trial to Investigate Teprotumumab Subcutaneous Administration Compared With Placebo in Male and Female Adult Participants With Moderate-to-severe Active Thyroid Eye Disease
Thyroid Eye DiseaseUnlock trial analytics
PHASE3COMPLETED
Treatment of Graves' Orbitopathy to Reduce Proptosis With Teprotumumab Infusions in an Open-Label Clinical Extension Study
Thyroid Eye DiseaseUnlock trial analytics
PHASE3COMPLETED
Treatment of Graves' Orbitopathy (Thyroid Eye Disease) to Reduce Proptosis With Teprotumumab Infusions in a Randomized, Placebo-Controlled, Clinical Study
Thyroid Eye DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Proptosis responder rate (percentage of participants with a ≥ 2-mm reduction from baseline in proptosis in the study eye without deterioration [≥ 2-mm increase] of proptosis in the fellow eye).
Week 24
Percentage of Participants With a ≥ 2 mm Reduction From Baseline in the Study Eye Without Deterioration of Proptosis in the Fellow Eye at Week 24
Baseline, Week 24

Proptosis responders were defined as participants with a ≥ 2 mm reduction from study baseline in proptosis in the study eye, without deterioration (≥ 2 mm increase) of proptosis in the fellow eye at Week 24. Participants missing Week 24 values were considered non-responders, aside from those with missing data related to the COVID-19 pandemic.

Percentage of Participants Who Were Proptosis Responders at Week 24
Week 24

Proptosis responders were defined as participants with a ≥2 mm reduction from Baseline in proptosis in the study eye, without deterioration (≥2 mm increase) of proptosis in the fellow eye at Week 24.

Responder Status at Week 24
Week 24

Number of participants classified as responders and non-responders at Week 24. Responders were defined as participants with a reduction in clinical activity score (CAS, see Outcome Measure 4 description for details) of ≥ 2 points, and a reduction in proptosis (amount of protrusion of the eye from the orbital rim) of ≥ 2 mm in the study eye, and no deterioration (increase in CAS of ≥ 2 points or increase in proptosis of ≥ 2 mm) in the non-study eye. Participants who had no assessment at 24 weeks were considered non-responders.

Pharmacokinetics (PK): Area Under the Curve (AUC) of Teprotumumab
Pre dose through Week 6

AUC will be evaluated from the collected PK samples.

PK: Maximum Serum Concentration (Cmax) of Teprotumumab
Pre dose through Week 6

Cmax will be evaluated from the collected PK samples.

Number of Participants With Adverse Events (AE)
Up to Week 6

An AE is any untoward medical occurrence in a participant or clinical investigation subject administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can, therefore, be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom or disease temporally associated with the use of a medicinal (investigational) product, whether or not considered related to the medicinal (investigational) product.

Cohort 1, 2, and 4: Area Under the Serum Concentration-time Curve (AUC) From Time 0 Extrapolated to Infinity (AUCinf) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: AUC From Time 0 to the Last Quantifiable Concentration (AUClast) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Percentage of the Area Extrapolated for Calculation of AUCinf (%AUCextrap) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Maximum Observed Serum Concentration (Cmax) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Last Quantifiable Serum Concentration (Clast) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Time to Maximum Observed Serum Concentration (Tmax) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Time of Last Quantifiable Serum Concentration (Tlast) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Apparent Terminal Elimination Rate Constant (λz) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Apparent Terminal Half-life (t1/2) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Apparent Serum Clearance (CL/F) of TEPEZZA
Day 1 pre-dose to Day 71
Cohort 1, 2, and 4: Apparent Volume of Distribution During the Terminal Phase (Vz/F) of TEPEZZA
Day 1 pre-dose to Day 71
Safety of RV001in subjects with Diabetic Macular Edema
Change from Baseline to Week 9

Number of subjects with adverse events, serious adverse events and early discontinuations due to adverse events. Number of subjects with clinical significant abnormal laboratory values, electrocardiograms (pre and post infusions), abnormal vital signs, ophthalmic and physical examinations.

Secondary Endpoints

Mean change from Baseline in proptosis measurement in the study eye
Week 24
Overall responder rate (percentage of participants with ≥ 2-point reduction in CAS AND ≥ 2-mm reduction in proptosis from Baseline, provided there is no corresponding deterioration [≥ 2-point/mm increase] in CAS or proptosis in the fellow eye)
Week 24
Percentage of participants with a CAS value of 0 or 1
Week 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TeprotumumabEXPERIMENTALTeprotumumab administered SC
PlaceboPLACEBO_COMPARATORPlacebo for teprotumumab administered SC
Teprotumumab 20 mg/kgACTIVE_COMPARATORApproximately 38 participants will receive 8 infusions of teprotumumab q3W for a total of 21 weeks. Teprotumumab 10 mg/kg will be administered on Day 1 and teprotumumab 20 mg/kg will be administered q3W for the remaining 7 infusions.
Cohort 1EXPERIMENTALParticipants will receive a single dose of lyophilized teprotumumab by subcutaneous (SC) administration on Day 1 followed by intravenous (IV) infusions of teprotumumab at the approved dosing regimen.
Cohort 2EXPERIMENTALParticipants will receive a single high concentration formulation teprotumumab by SC administration on Day 1 followed by IV infusions of teprotumumab at the approved dosing regimen.
Cohort 1: TEPEZZA Dose A SubQEXPERIMENTALParticipants will receive Dose A of TEPEZZA administered SubQ.
Cohort 2: TEPEZZA Dose B SubQEXPERIMENTALParticipants will receive Dose B of TEPEZZA administered SubQ.
Cohort 3: TEPEZZA Dose B Intravenously (IV)EXPERIMENTALParticipants will receive Dose B of TEPEZZA administered IV.
Cohort 4: TEPEZZA Dose B and EDP SubQEXPERIMENTALParticipants will receive coadministered doses of TEPEZZA Dose B and EDP SubQ.

Interventions

NameTypeDescription
TeprotumumabBIOLOGICALSC injection
PlaceboOTHERSC injection
normal salineDRUG -
TEPEZZADRUGAdministered as a SubQ injection or IV injection.
EDPDRUGAdministered as a SubQ injection.
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites38

Inclusion Criteria: 1. Participant must provide written informed consent. 2. Participant can be male or female and must be between the ages of 18 and 80 years, inclusive, at Screening. 3. Participant must have a clinical diagnosis of Graves' disease associated with active TED with a CAS ≥ 3 (on the...

Countries:United StatesArgentinaAustraliaCanadaFranceGermanyItalyJapanSpainTaiwanUnited Kingdom
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Frequently asked questions about TEPEZZA

What is TEPEZZA?

TEPEZZA is an investigational small molecule developed by Amgen Inc. (ticker AMGN). It is being studied in a Phase 1 clinical program, with one completed trial to date. The trial evaluated subcutaneous administration of TEPEZZA in healthy adult volunteers in the United States.

Who makes TEPEZZA?

TEPEZZA is developed by Amgen Inc., which trades under the ticker AMGN. Amgen is the sponsor of the clinical program studying the drug, including the completed Phase 1 trial of subcutaneous administration in healthy adults.

What phase is TEPEZZA in?

TEPEZZA is in Phase 1 clinical development. One Phase 1 trial has been completed, and no active trials are currently listed. The completed study enrolled 37 healthy adult volunteers and examined subcutaneous administration of the drug.

What clinical trials is TEPEZZA in?

TEPEZZA has been studied in one completed Phase 1 trial, NCT06563856, titled A Study of TEPEZZA Subcutaneous Administration in Healthy Adults. The trial enrolled 37 participants in the United States and assessed bioavailability and bioequivalence in healthy volunteers aged 18 years and older.

Is TEPEZZA FDA approved?

TEPEZZA is an investigational drug in Phase 1 clinical development and is not described as approved. Its only listed trial, NCT06563856, is a completed Phase 1 study of subcutaneous administration in healthy adults, so the program remains at an early clinical stage.

What did the TEPEZZA Phase 1 trial study?

The Phase 1 trial NCT06563856 studied subcutaneous administration of TEPEZZA in healthy adults. It enrolled 37 participants in the United States, used a controlled design without randomization or double blinding, and evaluated bioavailability and bioequivalence in volunteers aged 18 years and older.