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Pharmacokinetic and Pharmacodynamic Study in Healthy Subjects Comparing the Interactions Between E5501 and Verapamil and Cyclosporine.

This study has been completed.
Information provided by (Responsible Party):
Eisai Inc. Identifier:
First received: September 19, 2011
Last updated: May 18, 2012
Last verified: May 2012
36 healthy adult men and women will be enrolled with the goal of having 24 subjects complete the entire study. The study will consist of a pre-treatment phase and a treatment phase. The pre-treatment phase will include screening and baseline period 1. The treatment phase consists of 4 treatment period: Treatment Period 1 - administration of the first E5501 oral dose; Treatment Period 2 - administration of verapamil and the second E5501 oral dose; Treatment Period 3 - administration of the third E5501 dose; Treatment Period 4 - concomitant administration of cyclosporine and the fourth E5501 dose. A baseline period will precede each treatment period. The screening period will be up to 13 days in duration. After fulfilling screening requirements, subjects will check into the clinic on Day -1 for baseline assessments. They will be domiciled in the clinical testing facility for 6 days for Treatment Periods 1, 3, and 4 and will return intermittently for study procedures for 8 outpatient visits. They will be domiciled in the clinical testing facility for at least 14 days for Treatment Period 2 and will return intermittently for study procedures for 7 outpatient visits.

Condition Intervention Phase
Idiopathic Thrombocytopenic Purpura (ITP) Drug: E5501 Phase 1

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: An Open-label, Single-sequence, Four-treatment Period Study to Evaluate Pharmacokinetic and Pharmacodynamic Interactions Between E5501 and Verapamil, and E5501 and Cyclosporine, Known P-glycoprotein Inhibitors in Healthy Subjects

Resource links provided by NLM:

Further study details as provided by Eisai Inc.:

Primary Outcome Measures:
  • Plasma concentrations of E5501 [ Time Frame: Periodically over the course of Days 1-11 ]

Secondary Outcome Measures:
  • Platelet counts [ Time Frame: Periodically over the course of Days 1-34 ]

Enrollment: 36
Study Start Date: September 2011
Primary Completion Date: March 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: E5501 plus minus verapamil; plus minus cyclosporine Drug: E5501
20 mg oral dose of E5501; 240 mg once daily oral dose of sustained release verapamil; 400 mg oral dose of cyclosporine


Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes


  • Healthy adult men and women (age 18 to 55 years)
  • Body mass index greater than or equal to 18kg/m2 and less than or equal to 32kg/m2 at the time of Screening and at each Baseline
  • Platelet count between 120x109/L and 300x109/L at Baseline
  • Women of childbearing potential must agree to use a highly effective method of contraception, other than estrogen-based hormonal contraceptives, during the treatment phase of the study


  • Evidence of clinically significant cardiovascular, hepatic, gastrointestinal, renal, respiratory, endocrine, hematologic, neurologic, or psychiatric disease or abnormalities or a known history of any gastrointestinal surgery that could impact the PK of the study
  • Agents associated with thrombotic events (including oral contraceptives) must be discontinued within 30 days of first study drug administration
  • Evidence of organ dysfunction or any clinically significant event or illness in the subject's medical history, e.g., history of splenectomy
  • History of arterial or venous thrombosis, including partial or complete thromboses (e.g., stroke, transient ischemic attack, myocardial infarction, deep vein thrombosis, or pulmonary embolism). Known family history of hereditary thrombophilic disorders (e.g., Factor V Leiden, antithrombin III deficiency, etc.)
  • Hemoglobin less than the lower limit of normal levels (women, 7.1 mmol/L; men, 8.1 mmol/L) In addition, other standard criteria for healthy volunteers will be used.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01437384

United States, Arizona
Tempe, Arizona, United States, 85283
Sponsors and Collaborators
Eisai Inc.
Study Director: Gina Pastino Eisai Inc.
  More Information

Responsible Party: Eisai Inc. Identifier: NCT01437384     History of Changes
Other Study ID Numbers: E5501-A001-008
Study First Received: September 19, 2011
Last Updated: May 18, 2012

Additional relevant MeSH terms:
Purpura, Thrombocytopenic
Purpura, Thrombocytopenic, Idiopathic
Blood Coagulation Disorders
Hematologic Diseases
Pathologic Processes
Skin Manifestations
Signs and Symptoms
Thrombotic Microangiopathies
Blood Platelet Disorders
Immune System Diseases
Hemorrhagic Disorders
Autoimmune Diseases
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs
Antifungal Agents
Anti-Infective Agents
Dermatologic Agents
Antirheumatic Agents
Calcineurin Inhibitors
Anti-Arrhythmia Agents
Calcium Channel Blockers processed this record on August 23, 2017