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ALT-801

Phase 2

Obesity/Overweight | Small molecule | Metabolic |Altimmune, Inc.|Last Updated: Jun 24, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment391

FDA Designations

No designations recorded

Clinical trial landscape

ALT-801 · 5 trials · 5 indications

Phase 2 1Phase 1 4
NCT05295875Efficacy and Safety of ALT-801 in the Treatment of ObesityObesity/Overweight
COMPLETED391 Analytics
PHASE2COMPLETED
Efficacy and Safety of ALT-801 in the Treatment of Obesity
Obesity/OverweightUnlock trial analytics

Study Endpoints

Primary Endpoints

Relative change from baseline in body weight percentage
Baseline to Week 48
The Number of Participants with One or More Treatment-Emergent Adverse Events (TEAEs)
Up to Day 110

Number of participants with one or more TEAEs

Changes from baseline in area under the curve of serum glucose, C-peptide, and insulin
Baseline to Day 85
Changes from baseline in fasting serum glucose and insulin as measured by Homeostasis Model Assessment for Insulin Resistance 2 (HOMA-IR2)
Baseline to Day 85
Pharmacokinetic (PK): Maximum observed concentration (Cmax) of ALT-801
Baseline, Day 26
Pharmacokinetic (PK): Area Under the Concentration (AUC) vs Time Curve of ALT-801
Baseline to Day 26
Change in body weight
Baseline to Week 6
Pharmacodynamic (PD): Change from baseline in magnetic resonance derived proton density fat fraction (MRI-PDFF)
Baseline to Week 6

Secondary Endpoints

Percent proportion of subjects with weight loss of greater than or equal to 5%, 10%, and 15%
Baseline to Week 48
Change from baseline in lipids
Baseline to Week 48
The Number of Participants with One or More Treatment-Emergent Adverse Events (TEAEs)
Baseline to Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ALT-801 Dose Level 1EXPERIMENTAL -
ALT-801 Dose Level 2EXPERIMENTAL -
ALT-801 Dose Level 3EXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
ALT-801 1.2 mgEXPERIMENTAL1.2 mg once weekly for 12 weeks
ALT-801 1.8 mgEXPERIMENTAL1.8 mg once weekly for 12 weeks
ALT-801 2.4 mgEXPERIMENTAL0.6 mg at Week 1, 1.2 mg at Week 2, 1.8 mg once weekly for 2 weeks (Weeks 3 and 4), and 2.4 mg once weekly for Weeks 5 through 12
ALT-801 (Part 1)EXPERIMENTALSingle ascending dose (SAD) cohorts of ALT-801
Placebo (Part 1)PLACEBO_COMPARATORSingle dose of placebo
ALT-801 (Part 2)EXPERIMENTALMultiple ascending dose (MAD) cohorts of ALT-801 administered once weekly for 12 weeks
Placebo (Part 2)PLACEBO_COMPARATORPlacebo administered once weekly for 12 weeks

Interventions

NameTypeDescription
ALT-801DRUGInjected subcutaneously (SC)
PlaceboOTHERInjected subcutaneously (SC)
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites31

Inclusion Criteria: * Written informed consent signed prior to entry into the study * Male or female age 18 to 75 years, inclusive * Body mass index (BMI) ≥ 30 kg/m2 or BMI ≥ 27 kg/m2 combined with at least one obesity-related comorbidity * At least one unsuccessful weight loss attempt per investig...

Countries:United StatesAustralia
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Frequently asked questions about ALT-801

What is ALT-801 used for?

ALT-801 is an investigational small molecule being developed for obesity and overweight, non-alcoholic fatty liver disease (NAFLD), and type 2 diabetes. It has been studied in clinical trials enrolling adults in the United States with these conditions.

Who makes ALT-801?

ALT-801 is being developed by Altimmune, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol ALT.

What phase is ALT-801 in?

ALT-801 has completed Phase 1 and Phase 2 clinical trials. It is an investigational drug and is not approved by the FDA. All reported trials for ALT-801 have been completed.

What clinical trials is ALT-801 in?

ALT-801 has been studied in four completed clinical trials. These include NCT05006885 and NCT05292911 in patients with non-alcoholic fatty liver disease, NCT05134662 in patients with type 2 diabetes, and NCT05295875 in patients with obesity or overweight.

Is ALT-801 the same as any other drug?

No alternative names for ALT-801 have been reported. It is referred to solely as ALT-801 in clinical trial records and by its developer, Altimmune, Inc.

What is the mechanism of action of ALT-801?

The specific molecular target of ALT-801 has not been disclosed. It is a small molecule being studied for its effects on metabolic conditions including obesity, NAFLD, and type 2 diabetes.