Impax Laboratories

Open enrollment across a mixed-phase pipeline

According to ClinicalTrials.gov-derived indexes, Impax Laboratories sits in the top decile of US sponsors by registered trial count (#772 of 15,742 sponsors by registered trial count).

19 total trials 1 currently recruiting 18 completed top decile by trial count

Impax Laboratories: 19 sponsored US clinical trials, 1 recruiting.

Impax Laboratories sponsors 19 registered US clinical trials on ClinicalTrials.gov, 1 of them currently recruiting, and 18 completed. 10 of these trials are in Phase 3-4 (later-stage) and 9 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Parkinson's Disease, with 4 trials.

Top-decile sponsor footprint

Impax Laboratories ranks in the top decile of sponsors by registered trial count (#772 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

A 90/100

18 of 18 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (100.0%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Open and recent trials

19 total, page 1 of 1

RECRUITING Phase 4

A Study of CREXONT (Carbidopa and Levodopa) Extended-Release Capsules in Participants With Parkinson's Disease

NCT06765668

COMPLETED Phase 1

A TQT Study to Evaluate the Electrocardiographic Effects of Carbidopa in Healthy Subjects

NCT06161220

COMPLETED Phase 3

Open Label Extension (OLE) Study of the Safety and Clinical Utility of IPX203 in Parkinson's Disease (PD) Participants With Motor Fluctuations

NCT03877510

COMPLETED Phase 3

A Study to Evaluate the Safety and Efficacy of IPX203 in Parkinson's Disease Participants With Motor Fluctuations

NCT03670953

COMPLETED Phase 3

Efficacy & Safety Of Zomig Nasal Spray For Acute Migraine Treatment In Subjects 6 To 11 Years, With OLE

NCT03275922

COMPLETED Phase 2

A Study to Assess the PK and Pharmacodynamics of IPX203 in Subjects With Advanced Parkinson's Disease

NCT03007888

COMPLETED Phase 2

A Study to Assess the PK and Pharmacodynamics of IPX203 in Patients With Advanced Parkinson's Disease

NCT02271503

COMPLETED Phase 2

Safety and Efficacy Study of IPX159 in Restless Legs Syndrome (RLS)

NCT01521663

COMPLETED Phase 3

Carbidopa-Levodopa (CD-LD) ER Alone or in Combination With CD-LD IR to IPX066 Followed by IPX066 Extension Safety Study

NCT01411137

COMPLETED Phase 3

A Study to Compare IPX066 and Carbidopa/Levodopa/Entacapone (CLE) Followed by an Open-Label Safety Study of IPX066

NCT01130493

COMPLETED Phase 3

An Open Label Extension Study of the Safety and Clinical Utility of IPX066 in Subjects With Parkinson's Disease

NCT01096186

COMPLETED Phase 3

A Study To Evaluate The Safety And Efficacy Of IPX066 In Advanced Parkinson's Disease (ADVANCE-PD).

NCT00974974

COMPLETED Phase 3

A Study To Evaluate The Safety And Efficacy Of IPX066 In Subjects With Parkinson's Disease

NCT00880620

COMPLETED Phase 2

A Study With IPX056 in Subjects With Spasticity Associated With Multiple Sclerosis

NCT00914290

COMPLETED Phase 2

A Study to Compare Pharmacokinetics and Pharmacodynamics of IPX066 to Standard Carbidopa-Levodopa

NCT00869791

COMPLETED Phase 3

IPX056 in Subjects With Established Spasticity Resulting From Multiple Sclerosis

NCT00488839

COMPLETED Phase 2

Comparison of IPX054, IR Carbidopa-Levodopa, and CR Carbidopa-Levodopa in Subjects With Parkinson's Disease

NCT00279825

COMPLETED Phase 2

Comparison of IPX054 and Immediate-Release Carbidopa-Levodopa in Patients With Parkinson's Disease

NCT00253084

COMPLETED Phase 1

Pharmacokinetics and Pharmacodynamics of IPX054 in Subjects With Parkinson's Disease

NCT00239564

Phase Distribution

PhaseTrial count
Phase 1 2
Phase 2 7
Phase 3 9
Phase 4 1

What is open in the Impax Laboratories pipeline

1 recruiting of 19 indexed (5% open); 18 completed (95%).

Phase mix: 10 late (III/IV) vs 9 early (I/II) (balanced across stages).

Top condition: Parkinson's Disease (4 trials), 2 others listed.

How open-pipeline share is computed

Recruiting share is recruiting_count divided by trial_count for this sponsor in the public registry export. Status can change between pulls; treat the figure as a research-attention snapshot, not product availability.

Impax Laboratories: open-pipeline peers nationwide

Peers matched on 19 registered trials and 5% open enrollment, not the therapeutic-area sidebar.

Impax Laboratories sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 152025303540 0%5%10%15% Total trials Recruiting share Impax LaboratoriesAlmirall, S.A.Bastyr UniversityChurch & Dwight CompanyCordis USDefense and Veterans Center for Integrative Pain ManagementDePuy OrthopaedicsKent State UniversityOmeros Corporation
Impax Laboratories sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

Impax Laboratories sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 19 trials (± recruiting share)

Sponsors near 5% open enrollment (± trial volume)

What to do with this Impax Laboratories page

19 registered trials is a research-attention snapshot, not an endorsement of Impax Laboratories or any single study.

  • 1 of Impax Laboratories's trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Parkinson's Disease is the condition Impax Laboratories studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Parkinson's Disease trials
  • Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Impax Laboratories pipeline card: 19 registered trials from official public datasets.Report a data error.