XenoPort

19 total trials 19 completed

XenoPort sponsors 19 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 19 completed. 3 of these trials are in Phase 3-4 (later-stage) and 16 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Restless Legs Syndrome, with 2 trials.

Trial Pipeline

19 total, page 1 of 1

COMPLETED Phase 4

Gabapentin Enacarbil (GSK1838262) Adult Restless Leg Syndrome (RLS) Post Marketing Commitment Study

NCT01668667

COMPLETED Phase 1

A Study to Evaluate the Effect of Gabapentin on Cardiac Repolarization in Healthy Volunteers

NCT01516372

COMPLETED Phase 1

Drug Drug Interaction Study With Gabapentin Enacarbil and Morphine

NCT01476124

COMPLETED Phase 1

Study to Assess the Effect of Gabapentin Enacarbil on Simulated Driving in Healthy Subjects

NCT01411124

COMPLETED Phase 3

Efficacy and Safety of Arbaclofen Placarbil in Subjects With Spasticity Due to Multiple Sclerosis

NCT01359566

COMPLETED Phase 2

A Efficacy, Safety and Pharmacokinetic Study of XP21279 and Sinemet® in Parkinson's Disease Subjects

NCT01171313

COMPLETED Phase 2

A Study to Evaluate the Efficacy and Safety of Arbaclofen Placarbil (XP19986) as Adjunctive Therapy in Subjects With Gastroesophageal Reflux Disease (GERD)

NCT00978016

COMPLETED Phase 1

An Exploratory Study of XP21279 (With Lodosyn®) and Sinemet® in Parkinson's Disease Subjects

NCT00914602

COMPLETED Phase 1

Relative Bioavailability Study for GSK1838262 (Gabapentin Enacarbil)

NCT00833391

COMPLETED Phase 2

A Study to Evaluate the Safety and Tolerability of Arbaclofen Placarbil (XP19986) in Subjects With Acute Back Spasms

NCT00817986

COMPLETED Phase 3

Polysomnography Study of GSK1838262 Extended Release Tablets Versus Placebo in RLS and Associated Sleep Disturbance

NCT00748098

COMPLETED Phase 2

Prevention Study in Adult Patients Suffering From Migraine Headaches

NCT00742209

COMPLETED Phase 2

A Clinical Study in Subjects With Neuropathic Pain From PHN Who Have Had an Inadequate Response to Gabapentin Treatment

NCT00617461

COMPLETED Phase 2

A Study In Patients With Neuropathic Pain From Diabetic Peripheral Neuropathy (DPN)

NCT00643760

COMPLETED Phase 2

A Study In Patients With Neuropathic Pain From Post-Herpetic Neuralgia (PHN)

NCT00619476

COMPLETED Phase 2

A Safety and Efficacy Study of XP19986 in Subjects With Spasticity Due to Spinal Cord Injury

NCT00557973

COMPLETED Phase 2

An Efficacy and Safety Study of XP19986 in Subjects With Symptomatic GERD

NCT00557401

COMPLETED Phase 2

Simulated Driving Study in Restless Legs Syndrome

NCT01332318

COMPLETED Phase 2

Dose-Response and Pharmacokinetics of Gabapentin Enacarbil (GEn [XP13512 / GSK1838262]) in Restless Legs Syndrome

NCT01332305

Phase Distribution

PhaseTrial count
Phase 1 5
Phase 2 11
Phase 3 2
Phase 4 1

What the Pipeline for XenoPort Shows

According to the ClinicalTrials.gov registry, XenoPort is linked to 19 US clinical trials across every stage of research activity. Of those, 0 studies are currently recruiting, about 0% of the sponsor's indexed portfolio, and 19 are already marked complete, representing roughly 100% of the total.

The phase mix for XenoPort reports 3 late-stage studies (Phase 3 and Phase 4 combined) and 16 earlier-phase studies (Phase 1 and Phase 2).

The top therapeutic focus area indexed for XenoPort is Restless Legs Syndrome with 2 linked trials, and 4 other condition areas appear in the top list above.

How to read these pipeline numbers

Recruiting share is one of the more practical signals here: it reflects how much of a sponsor's research is presently open to new participants, while the completed share indicates the depth of finished work that has already contributed registry results. Both counts come directly from the public ClinicalTrials.gov dataset and are refreshed on the registry side; this page mirrors the latest data pull without altering it.

A portfolio weighted toward Phase 3 usually reflects an organization advancing candidates toward regulatory review, where the research centers on comparative efficacy and broader safety across larger populations. A heavier Phase 1 and Phase 2 tilt generally indicates exploratory work, safety, dosing, and early signal detection, and is common among research-forward sponsors that seed many early programs. Phase 4 entries, when present, track interventions already in real-world use and typically focus on long-term safety, effectiveness across subgroups, or formulation comparisons.

That distribution is a quick read of where the organization concentrates its research attention; it does not imply product availability, market share, or any clinical endorsement. All numbers on this page come from ClinicalTrials.gov maintained by the National Library of Medicine, and counts can shift as new studies are registered or existing ones update their status. This information is provided for reference and educational purposes only, not as medical, investment, or regulatory advice, verify current details directly with ClinicalTrials.gov before relying on any figure here.

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainTrial Editorial

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial from this sponsor, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.