Recent Updates
Recently added Catalysts

Choline Chloride

Phase 2/3

Choline Deficiency | Enzyme Replacement Therapies (ERT) | Gastrointestinal |Protara Therapeutics, Inc.|Trials Updated: Aug 24, 2026

Choline Chloride target and mechanism

ModalityEnzyme Replacement Therapies (ERT)

Also known as Choline Chloride for Injection

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment129

FDA Designations

ORPHAN_DRUG

Choline Chloride clinical trials

Choline Chloride · 1 trial · 2 indications

Phase 2/3 1
NCT06910943Study of Choline Chloride for Injection in Adolescent and Adult Patients With Intestinal Failure Receiving Long Term Parenteral SupportCholine Deficiency
RECRUITING129 Analytics
PHASE2/PHASE3RECRUITING
Study of Choline Chloride for Injection in Adolescent and Adult Patients With Intestinal Failure Receiving Long Term Parenteral Support
Choline DeficiencyUnlock trial analytics

Study Endpoints

Primary Endpoints

Open-Label Dose-Selection Phase: PK of plasma free choline (Cmax) during Week 1 and Week 8 Visits
Week 1 to Week 8

Cmax = maximum concentration

Open-Label Dose-Selection Phase: Open-Label Dose-Selection Phase: PK of plasma free choline (Tmax) during Week 1 and Week 8 Visits
Week 1 to Week 8

Tmax = time of maximum concentration

Open-Label Dose-Selection Phase: PK of plasma free choline (AUC(0-TAU)) during Week 1 and Week 8 Visits
Week 1 to Week 8

AUC = area under the curve, AUC(0-TAU) = AUC at end of dosing

Open-Label Dose-Selection Phase: Change from Baseline in plasma free choline concentrations at Week 8
Week 1 to Week 8
Open-Label Dose-Selection Phase and Double-Blind, Placebo-Controlled Phase, Open-Label Extension Phase: Incidence and severity of TEAEs Incidence of TESAEs
Week 1 to Week 64

TEAE = treatment emergent adverse event, TESAE = treatment emergent serious adverse event

Double-Blind, Placebo-Controlled Phase: Change from Baseline in peak plasma free choline concentrations (Cmax) at Week 8 in participants receiving Choline Chloride for Injection versus Placebo
Week 1 to Week 8

Tmax = time of maximum concentration

Open-Label Extension Phase: Participants from Open-Label Dose-Selection Phase: Percentage of participants with plasma free choline concentrations of ≥ 9.5 nmol/mL at Week 64
Week 64
Open-Label Extension Phase: Percentage of participants maintaining plasma free choline concentrations of ≥ 9.5 nmol/mL at Week 8 and Week 64 (ie, both timepoints)
Week 8 to Week 64
Open-Label Extension Phase: Participants from Double-Blind, Placebo-Controlled Phase: % with plasma free choline concentrations of ≥9.5 nmol/mL at Week 64
Week 1 to Week 64
Open-Label Extension Phase: Participants from Double-Blind Placebo-Controlled Phase: % maintaining plasma free choline concentrations of ≥ 9.5 nmol/mL at Week 8, Week 24 and Week 64 for participants who previously received Choline Chloride for Injection
Week 8 to Week 64

Secondary Endpoints

Open-Label Dose-Selection Phase: Change from Baseline to Week 8 in ALP, AST, ALT, GGT, VLDL, total bilirubin, direct bilirubin levels, CPK, homocysteine and albumin levels
Week 1 to Week 8
Open-Label Dose-Selection Phase: Triplicate QTc measurements collected during Week 1 and Week 8, and changes from pre-infusion QTc at Week 1 to all post-baseline timepoints
Week 1 to Week 8
Open-Label Dose-Selection Phase: Percentage of participants achieving plasma free choline concentration Cmax ≥ 9.5 nmol/mL at Week 8
Week 1 to Week 8
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Open-Label, Dose-Selection: Dose 1EXPERIMENTAL -
Open-Label, Dose-Selection: Dose 2EXPERIMENTAL -
Open-Label, Dose-Selection: Dose 3EXPERIMENTAL -
Double-Blind, Placebo-Controlled: High DoseEXPERIMENTAL -
Double-Blind, Placebo-Controlled: Low DoseEXPERIMENTAL -
Double-Blind, Placebo-Controlled: PlaceboPLACEBO_COMPARATOR -
Open Label Extension: High DoseEXPERIMENTAL -
Open Label Extension: Low DoseEXPERIMENTAL -

Interventions

NameTypeDescription
Choline Chloride for InjectionDRUGIntravenous use
PlaceboDRUGIntravenous use
Unlock Study Design Details

Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites18

Key Inclusion Criteria: * Male or female 12 years of age or older at the time of signing the informed consent * Individuals who have voluntarily given written informed consent after the nature of the study has been explained according to applicable requirements, prior to study entry * Individuals w...

Countries:United StatesBelgiumDenmarkFranceGermanyPoland
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

MEDIUMAug 24, 2026NCT06910943primaryCompletionDate: changed
MEDIUMAug 24, 2026NCT06910943primaryCompletionDate: changed

Frequently asked questions about Choline Chloride

What is Choline Chloride used for?

Choline Chloride is being developed for choline deficiency, including in patients with intestinal failure who receive long term parenteral support. It is an investigational small molecule being studied in a Phase 2 clinical trial. Choline deficiency in this population can be associated with liver injury, which is also listed among the conditions studied.

Who is developing Choline Chloride?

Choline Chloride is being developed by Protara Therapeutics, Inc., which trades under the ticker TARA. The company is sponsoring the clinical program evaluating the drug in patients with choline deficiency. It holds an orphan drug designation for this program.

What phase is Choline Chloride in?

Choline Chloride is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA. The program includes one active Phase 2 trial that is currently recruiting participants, with no completed trials to date.

What clinical trials is Choline Chloride in?

Choline Chloride is being studied in the Phase 2 trial NCT06910943, titled Study of Choline Chloride for Injection in Adolescent and Adult Patients With Intestinal Failure Receiving Long Term Parenteral Support. The trial is recruiting 129 participants across the United States, Belgium, Denmark, France, Germany, and Poland, and it is randomized, double blind, and placebo controlled.

Is Choline Chloride the same as Choline Chloride for Injection?

Yes, Choline Chloride for Injection is another name for Choline Chloride. Both names refer to the same investigational small molecule developed by Protara Therapeutics for choline deficiency. The Phase 2 trial NCT06910943 studies the injectable formulation in adolescent and adult patients with intestinal failure receiving long term parenteral support.

Who can enroll in the Choline Chloride clinical trial?

The Phase 2 trial NCT06910943 enrolls adolescent and adult patients with intestinal failure who are receiving long term parenteral support. Participants must be at least 12 years old, and both sexes are eligible. The study does not enroll healthy volunteers and is currently recruiting in the United States and several European countries.