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TD-5108

Phase 2

Chronic Constipation | Small molecule | Gastrointestinal |Theravance Biopharma, Inc.|Trials Updated: Jul 8, 2025

TD-5108 development status

Highest phase Phase 2
Registered trials 4 across 2 sponsors since Nov 2012

TD-5108 target and mechanism

Molecular target5-HT4
Target classReceptor
ModalitySmall molecule

Also known as Velusetrag, velusetrag dose 1, velusetrag dose 2, velusetrag dose 3

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindUNCONTROLLED
Total Trials4
Total Enrollment667

FDA Designations

No designations recorded

TD-5108 clinical trials

TD-5108 · 4 trials · 3 indications

Phase 2 3Phase 1 1
NCT00391820Evaluate the Safety and Efficacy of a 5-HT4 Agonist in Chronic Constipation (ACCORD Trial)Chronic Constipation
COMPLETED360 Analytics
NCT02267525The Diabetic and Idiopathic Gastroparesis Efficacy, Safety, and Tolerability (DIGEST) StudyGastroparesis
COMPLETED233 Analytics
NCT01718938Phase 2 Study of Velusetrag in Diabetic or Idiopathic GastroparesisGastroparesis
COMPLETED34 Analytics
PHASE2COMPLETED
Evaluate the Safety and Efficacy of a 5-HT4 Agonist in Chronic Constipation (ACCORD Trial)
Chronic ConstipationUnlock trial analytics
PHASE2COMPLETED
The Diabetic and Idiopathic Gastroparesis Efficacy, Safety, and Tolerability (DIGEST) Study
GastroparesisUnlock trial analytics
PHASE2COMPLETED
Phase 2 Study of Velusetrag in Diabetic or Idiopathic Gastroparesis
GastroparesisUnlock trial analytics

Study Endpoints

Primary Endpoints

- Clinical response
7-day mean GCSI-24H (Gastroparesis Cardinal Symptoms Index) composite score
At Week 4
Gastric emptying half time (GE t1/2)
From baseline to week 5
Tolerability of repeat dosing of velusetrag
3 weeks

Number of subjects who complete the treatment period and are not withdrawn due to adverse events (AEs) or clinically significant findings on vital signs or ECGs

Secondary Endpoints

Gastric emptying half-time
At Week 4
Adverse events
103 days
Duration of lag time to gastric emptying (tlag)
From baseline to Week 5
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Velusetrag 5mgEXPERIMENTALVelusetrag 5mg capsules QD (once daily) x 12 weeks
Velusetrag 15mgEXPERIMENTALVelusetrag 15mg capsules QD x 12 weeks
Velusetrag 30mgEXPERIMENTALVelusetrag 30mg capsules QD x 12 weeks
PlaceboPLACEBO_COMPARATORPlacebo capsules QD x 12 weeks
Sequence 1EXPERIMENTAL3-way crossover of velusetrag or placebo
Sequence 2EXPERIMENTAL3-way crossover of velusetrag or placebo
Sequence 3EXPERIMENTAL3-way crossover of velusetrag or placebo
Sequence 4EXPERIMENTAL3-way crossover of velusetrag or placebo
Dose regimen 1EXPERIMENTALVaried doses
Dose regimen 2EXPERIMENTALVaried doses

Interventions

NameTypeDescription
TD-5108DRUG -
VelusetragDRUG -
PlaceboDRUG -
velusetrag dose 1DRUG -
velusetrag dose 2DRUG -
velusetrag dose 3DRUG -
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Eligibility Criteria

Age Range18 Years to 64 Years
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Meet ROME III Criteria Exclusion Criteria: * Constipation caused by:colonic etiology, pelvic floor dysfunction, metabolic disturbances, neurologic disturbances,concomitant medications affecting bowel function * Chronic treatment with anticholinergics, narcotic analgesics * I...

Countries:United States
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Frequently asked questions about TD-5108

What is TD-5108 used for?

TD-5108 is an investigational small molecule being developed for the treatment of chronic constipation. It has been studied in a Phase 2 clinical trial in adults with this gastrointestinal condition. TD-5108 is not approved for any indication and remains in clinical development.

What does TD-5108 target?

TD-5108 targets the 5-HT4 receptor, a serotonin receptor. It acts as a 5-HT4 agonist, meaning it activates this receptor. This receptor-targeted mechanism is being investigated for its effects in chronic constipation.

Who is developing TD-5108?

TD-5108 is being developed by Theravance Biopharma, Inc., which trades under the ticker TBPH. The company is responsible for the clinical development of this small molecule for chronic constipation.

What phase is TD-5108 in?

TD-5108 is in Phase 2 clinical development. It has completed one Phase 2 trial in chronic constipation. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trials is TD-5108 in?

TD-5108 has been studied in one completed Phase 2 trial, NCT00391820, titled the ACCORD Trial. This randomized, double-blind study evaluated the safety and efficacy of a 5-HT4 agonist in chronic constipation and enrolled 360 participants in the United States.