Eisai
Eisai sponsors 287 registered US clinical trials on ClinicalTrials.gov, 5 of them currently recruiting, and 243 completed. 67 of these trials are in Phase 3-4 (later-stage) and 214 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Healthy Subjects, with 6 trials.
Trial Pipeline
287 total, page 1 of 6
A Study to Evaluate the Efficacy and Safety of E2086 in Adults With Narcolepsy
NCT07493265
A Study to Determine the Metabolism and Excretion of [14C]E2086 in Healthy Male Participants
NCT07308236
A Study of Oral E1018 in Healthy Adult Participants
NCT06854042
A Study to Evaluate the Safety, Tolerability, and Efficacy of MORAb-202 (Herein Referred to as Farletuzumab Ecteribulin), a Folate Receptor Alpha (FRα)-Targeting Antibody-drug Conjugate (ADC) in Participants With Selected Tumor Types
NCT04300556
A Study to Evaluate Efficacy and Safety of Perampanel Administered as an Adjunctive Therapy in Pediatric Participants With Childhood Epilepsy
NCT04015141
A Study to Assess the Pregnancy Outcome in Women Exposed to Dayvigo® During Pregnancy Compared to an Unexposed Control Population
NCT06744673
A Study of E2814 With Concurrent Lecanemab Treatment in Participants With Early Alzheimer's Disease
NCT06602258
A Study of BB-1701 in Previously Treated Participants With Human Epidermal Growth Factor Receptor 2 (HER2)-Positive or HER2-low Unresectable or Metastatic Breast Cancer
NCT06188559
AHEAD 3-45 Study: A Study to Evaluate Efficacy and Safety of Treatment With Lecanemab in Participants With Preclinical Alzheimer's Disease and Elevated Amyloid and Also in Participants With Early Preclinical Alzheimer's Disease and Intermediate Amyloid
NCT04468659
A Study of H3B-6545 in Combination With Palbociclib in Women With Advanced or Metastatic Estrogen Receptor-Positive Human Epidermal Growth Factor Receptor-2 (HER2)-Negative Breast Cancer
NCT04288089
A Study of E7386 in Combination With Other Anticancer Drug(s) in Participants With Solid Tumor
NCT04008797
A Study to Confirm Safety and Efficacy of Lecanemab in Participants With Early Alzheimer's Disease
NCT03887455
Study of E7386 in Participants With Selected Advanced Neoplasms
NCT03264664
Lenvatinib/Everolimus or Lenvatinib/Pembrolizumab Versus Sunitinib Alone as Treatment of Advanced Renal Cell Carcinoma
NCT02811861
A Study of E2086 in Healthy Adult Participants
NCT06481488
A Study to Evaluate the Efficacy, Safety, and Tolerability of E2086 Compared to Placebo and Active Comparator in Adult Participants With Narcolepsy Type 1
NCT06462404
A Study To Assess the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of E2086 in Healthy Adult and Elderly Participants
NCT05745207
A Study to Assess the Safety, Tolerability, Pharmacokinetics, Immunogenicity, and Pharmacodynamics of E2025 in Healthy Participants
NCT05726851
A Study to Demonstrate the Bioequivalence of Lecanemab Supplied in Vials and a Single-Use Auto-Injector (AI) in Healthy Participants
NCT05533801
A Study to Assess the Safety and Tolerability of E2511 in Healthy Adult and Elderly Participants
NCT05147337
A Study of E7386 in Combination With Pembrolizumab in Previously Treated Participants With Selected Solid Tumors
NCT05091346
A Study of Subcutaneous Lecanemab in Healthy Participants
NCT05045716
A Study to Assess Safety and Target Engagement of E2814 in Participants With Mild to Moderate Cognitive Impairment Due to Dominantly Inherited Alzheimer's Disease
NCT04971733
A Study to Evaluate Lemborexant in Milk of Healthy Lactating Women
NCT04890561
A Study to Evaluate the Safety and Tolerability of Lenvatinib in Participants With Advanced or Unresectable Hepatocellular Carcinoma
NCT04763408
A Study of E2027 in Participants With Dementia With Lewy Bodies (DLB) or Parkinson's Disease Dementia (PDD) With or Without Amyloid Copathology
NCT04764669
A Study to Evaluate the Respiratory Safety of Lemborexant in Adult and Elderly Participants With Moderate to Severe Obstructive Sleep Apnea, and in Adult and Elderly Participants With Moderate to Severe Chronic Obstructive Pulmonary Disease
NCT04647383
A Study to Assess the Safety and Tolerability of E2730 After Multiple Dose and the Food Effect After Single Dose in Healthy Participants
NCT04676685
A Study of Lorcaserin as Adjunctive Treatment in Participants With Dravet Syndrome
NCT04572243
A Study to Assess the Safety and Tolerability of E2511 in Healthy Participants
NCT04547361
A Study to Determine the Signs and Symptoms That Impact Daily Life of Participants With Irregular Sleep-Wake Rhythm Disorder
NCT04300569
A Study to Compare the Efficacy and Safety of Ifosfamide and Etoposide With or Without Lenvatinib in Children, Adolescents and Young Adults With Relapsed and Refractory Osteosarcoma
NCT04154189
Study of Intratumorally Administered Stimulator of Interferon Genes (STING) Agonist E7766 in Participants With Advanced Solid Tumors or Lymphomas - INSTAL-101
NCT04144140
A Study to Assess Safety, Tolerability, Pharmacokinetics (PK), Immunogenicity, and Pharmacodynamics (PD) of Intravenous Infusions of E2814 in Healthy Participants
NCT04231513
A Study to Determine the Metabolism and Elimination of [14C]E2027 in Healthy Male Participants
NCT04023877
A Study to Evaluate Next-Dose Transition From Zolpidem to Lemborexant (LEM) for the Treatment of Insomnia
NCT04009577
A Food-Effect Study of E7386 in Healthy Participants
NCT03996226
A Study to Evaluate the Pharmacodynamic Activity of E2082 in Adult Participants With Photosensitive Epilepsy
NCT03686033
Study to Assess the Long-term Safety of Lenvatinib Monotherapy, a Lenvatinib Combination Regimen, or a Comparator Treatment Arm to Cancer Participants in Eisai Sponsored Lenvatinib Trials
NCT03477175
A Study to Demonstrate Bioequivalence Between Lorcaserin Extended Release (XR) Tablets Manufactured in Kawashima and Lorcaserin XR Tablets Manufactured in Zofingen in Healthy Participants
NCT03627936
A Study to Evaluate the Pharmacodynamic Activity of E2730 in Adult Participants With Photosensitive Epilepsy
NCT03603639
Lenvatinib in Combination With Pembrolizumab Versus Treatment of Physician's Choice in Participants With Advanced Endometrial Cancer (MK-3475-775/E7080-G000-309 Per Merck Standard Convention [KEYNOTE-775])
NCT03517449
Study To Evaluate the Efficacy, Safety and Tolerability of E2027 (Hereinafter Referred to as Irsenontrine) in Participants With Dementia With Lewy Bodies
NCT03467152
Trial to Evaluate Safety and Efficacy of Treatment of Physician Choice (TPC) Following First-Line Treatment of Lenvatinib in Subjects With Unresectable Hepatocellular Carcinoma (uHCC)
NCT03433703
Study to Assess Safety and Preliminary Activity of Eribulin Mesylate in Pediatric Participants With Relapsed/Refractory Rhabdomyosarcoma (RMS), Non-rhabdomyosarcoma Soft Tissue Sarcoma (NRSTS) and Ewing Sarcoma (EWS)
NCT03441360
Study to Evaluate the Respiratory Safety of Lemborexant in Adult and Elderly Healthy Subjects and Adult and Elderly Subjects With Mild Obstructive Sleep Apnea
NCT03471871
A Study to Assess the Safety, Tolerability, and Pharmacokinetics of E2730 in Healthy Participants
NCT03451890
Study to Evaluate the Pharmacokinetics of Lemborexant (E2006) and Its Metabolites in Subjects With Normal Renal Function or With Severe Renal Impairment
NCT03443063
Study to Assess the Pharmacokinetic Drug-Drug Interactions of Lemborexant When Coadministered With an Oral Contraceptive, Famotidine, or Fluconazole in Healthy Subjects
NCT03451110
Study to Evaluate the Pharmacokinetics of Lemborexant (E2006) and Its Metabolites in Subjects With Mild and Moderate Hepatic Impairment Compared to Healthy Subjects
NCT03440424
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 122 |
| Phase 2 | 92 |
| Phase 3 | 52 |
| Phase 4 | 15 |
Therapeutic Areas
What the Pipeline for Eisai Shows
According to the ClinicalTrials.gov registry, Eisai is linked to 287 US clinical trials across every stage of research activity. Of those, 5 studies are currently recruiting, about 2% of the sponsor's indexed portfolio, and 243 are already marked complete, representing roughly 85% of the total.
The phase mix for Eisai reports 67 late-stage studies (Phase 3 and Phase 4 combined) and 214 earlier-phase studies (Phase 1 and Phase 2).
The top therapeutic focus area indexed for Eisai is Healthy Subjects with 6 linked trials, and 9 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.
Read our methodology - how this data is sourced, computed, and verified.
Related
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.