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ABBV-552

Phase 2

Alzheimer's Disease (AD) | Small molecule | Neurology |AbbVie Inc.|Last Updated: Oct 15, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment263

FDA Designations

No designations recorded

Clinical trial landscape

ABBV-552 · 3 trials · 3 indications

Phase 2 1Phase 1 2
NCT05771428Study to Assess Adverse Events, Change in Disease Activity and How Oral ABBV-552 Capsules Moves Through the Body of Participants Aged 50 to 90 Years With Mild Alzheimer's DiseaseAlzheimer's Disease (AD)
COMPLETED263 Analytics
PHASE2COMPLETED
Study to Assess Adverse Events, Change in Disease Activity and How Oral ABBV-552 Capsules Moves Through the Body of Participants Aged 50 to 90 Years With Mild Alzheimer's Disease
Alzheimer's Disease (AD)Unlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-Cog 14) Score at Week 12
Week 12

The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 \[1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task\] and includes 3 additional tasks \[12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning\], for increased sensitivity in mild cognitive impairment (MCI) patients. The Total Score of the ADAS-Cog-14 ranges from 0 to 90, with a higher score representing greater impairment.

Number of Participants with Adverse Events (AEs)
Up to approximately 30 days

An adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment.

Maximum observed concentration (Cmax) of ABBV-552
Up to approximately Day 15

Cmax of ABBV-552 will be assessed.

Time to Cmax (peak time, Tmax) of ABBV-552
Up to approximately 15 days

Tmax of ABBV-552 will be assessed.

Terminal phase elimination rate constant (λz) of ABBV-552
Up to approximately 15 days

Terminal phase elimination rate constant (λz) of ABBV-552 will be assessed.

Terminal phase elimination half-life (t1/2) of ABBV-552
Up to approximately 15 days

Terminal phase elimination half-life (t1/2) of ABBV-552 will be assessed.

Area under the plasma concentration-time curve (AUC) from time 0 to the time of the last measurable concentration (AUCt) of ABBV-552
Up to approximately 15 days

AUCt of ABBV-552 will be assessed.

Area under the plasma concentration-time curve (AUC) from time 0 to infinite time (AUCinf) of ABBV-552
Up to approximately 15 days

AUCinf of ABBV-552 will be assessed.

Amount of ABBV-552 excreted in the urine over the sampling period (Aeu)
Up to approximately 15 days

Amount of ABBV-552 excreted in the urine over the sampling period (Aeu) will be assessed.

Percent of ABBV-552 excreted in the urine
Up to approximately 15 days

Percent excreted = 100 × (Aeu/dose).

Renal clearance ABBV-552 (CLr)
Up to approximately 15 days

Renal clearance of ABBV-552 will be assessed.

Amount of ABBV-552 excreted in the feces over the sampling period (Aef)
Up to approximately 15 days

Amount of ABBV-552 excreted in the feces over the sampling period (Aef) will be assessed.

Percent radioactivity excreted in the feces
Up to approximately 15 days

Percent excreted = 100 × (Aef/dose).

Number of Participants With Adverse Events (AE)
Up to approximately 45 days

An AE is any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment.

Maximum Observed Plasma Concentration (Cmax) of ABBV-552
Up to approximately 21 days

Maximum observed plasma concentration (Cmax) of ABBV-552.

Time to Cmax (Tmax) of ABBV-552
Up to approximately 21 days

The time to Cmax (Tmax) of ABBV-552.

Area Under the Plasma Concentration-Time Curve (AUC) From Time Zero to the Last Measurable Concentration (AUCt) of ABBV-552
Up to approximately 21 days

AUCt of ABBV-552.

AUC From Time Zero to Infinite Time (AUCinf) of ABBV-552
Up to approximately 21 days

AUCinf of ABBV-552.

Apparent Oral Clearance (CL/F) of ABBV-552
Up to approximately 21 days

Apparent oral clearance (CL/F) of ABBV-552.

Apparent Volume of Distribution (Vz/F) of ABBV-552
Up to approximately 21 days

Apparent volume of distribution (Vz/F) of ABBV-552.

Dose-Normalized Cmax of ABBV-552 (Arm 1)
Up to approximately 21 days

Dose-normalized Cmax of ABBV-552.

AUC of ABBV-552 (Arm 1)
Up to approximately 21 days

AUC of ABBV-552.

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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ABBV-552: 1 mgEXPERIMENTALParticipants will receive 1 mg of ABBV-552 once daily (QD) for 12 weeks.
ABBV-552: 5 mgEXPERIMENTALParticipants will receive 5 mg of ABBV-552 QD for 12 weeks.
ABBV-552: 15 mgEXPERIMENTALParticipants will receive 5 mg of ABBV-552 QD for 12 weeks.
PlaceboPLACEBO_COMPARATORParticipants will receive placebo for ABBV-552 QD for 12 weeks.
ABBV-552EXPERIMENTALParticipants will receive ABBV-552 on Day 1.
Arm 1: Healthy Japanese ParticipantsEXPERIMENTALParticipants will receive ABBV-552 once a week for 21 Days.
Arm 2: Healthy Han Chinese ParticipantsEXPERIMENTALParticipants will receive ABBV-552 once a week for 7 Days.

Interventions

NameTypeDescription
ABBV-552DRUGOral Capsule
Placebo for ABBV-552DRUGOral Capsule
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Eligibility Criteria

Age Range50 Years to 90 Years
SexALL
Healthy VolunteersNo
Study Sites64

Inclusion Criteria: * Diagnosis of probable Alzheimer's disease according to the National Institute of Aging-Alzheimer's Association (NIA-AA) (2011) criteria. * Mini-Mental State Examination (MMSE) score of 20 to 26, a Clinical Dementia Rating (CDR) global score of 0.5 or 1.0, with a CDR memory sco...

Countries:United StatesAustraliaGermanyJapanNew ZealandSpainUnited Kingdom
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Frequently asked questions about ABBV-552

What is ABBV-552 used for?

ABBV-552 is an investigational small molecule being studied for the treatment of mild Alzheimer's Disease (AD). It is being developed by AbbVie Inc. (ABBV) and has completed a Phase 2 clinical trial in participants aged 50 to 90 years with mild Alzheimer's Disease.

Who makes ABBV-552?

ABBV-552 is being developed by AbbVie Inc., a biopharmaceutical company traded on the New York Stock Exchange under the ticker ABBV. AbbVie is conducting clinical trials to evaluate the safety and efficacy of this investigational small molecule for Alzheimer's Disease.

What phase is ABBV-552 in?

ABBV-552 is in Phase 2 clinical development for Alzheimer's Disease. A Phase 2 study (NCT05771428) has been completed, evaluating the drug in 263 participants with mild Alzheimer's Disease. The drug is investigational and not yet approved by regulatory authorities.

What clinical trials is ABBV-552 in?

ABBV-552 has been studied in three completed clinical trials: NCT05686980, a Phase 1 study in healthy adult Japanese and Han Chinese participants; NCT05771428, a Phase 2 study in participants with mild Alzheimer's Disease; and NCT06278766, a Phase 1 mass balance study in healthy male participants.

Is ABBV-552 the same as other names?

ABBV-552 is the primary name for this investigational drug. No alternative names have been disclosed in the clinical trial records. It is identified by its compound code ABBV-552 in all registered studies.