A Study to Investigate the Potential Pharmacokinetic Interactions Between Phenytoin or Carbamazepine and Telaprevir

NCT ID: NCT01635829

Last Updated: 2013-10-24

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 24 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2012-05-31
• Study Completion Date: 2012-09-30

Brief Summary

The purpose of this study is to investigate the potential pharmacokinetic (what the body does to the drug) interactions between multiple doses of phenytoin 200 mg every 12 hours or carbamazepine 200 mg every 12 hours and telaprevir 750 mg every 8 hours at steady-state (constant concentration of medication in the blood) in healthy participants.

Detailed Description

This is a Phase I, open-label (all people know the identity of the intervention), randomized (the study medication is assigned by chance), 2-panel, sequential treatment study. In this study 24 healthy participants will be randomly assigned equally to 2 panels. In Panel 1 the participants will receive telaprevir in Part 1 (telaprevir 750 mg every 8 hours from Day 1 to Day 9 followed by a single 750 mg dose in the morning on Day 10) and phenytoin/telaprevir in Part 2 (phenytoin 200 mg every 12 hours from Day 1 to Day 16 followed by a single 200-mg dose in the morning on Day 17; and telaprevir 750 mg every 8 hours from Day 8 to Day 16 followed by a single 750 mg dose in the morning on Day 17). In Panel 2 the participants will receive telaprevir (telaprevir 750 mg every 8 hours from Day 1 to Day 9 followed by a single 750 mg dose in the morning on Day 10) and carbamazepine/ telaprevir (carbamazepine 200 mg every 12 hours from Day 1 to Day 16 followed by a single 200-mg dose in the morning on Day 17; and telaprevir 750 mg every 8 hours from Day 8 to Day 16 followed by a single 200-mg dose in the morning on Day 17). In both panels, Part 1 and Part 2 are separated by a washout period of at least 2 weeks and maximum 4 weeks. Safety and tolerability will be assessed by evaluating adverse events, electrocardiogram, clinical laboratory examinations, vital signs and physical examination throughout the study period.

Conditions

Healthy Participants

Keywords

Healthy participants; Hepatitis C virus; Telaprevir; Phenytoin; Carbamazepine; HCV; Interaction

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Panel 1

Part 1 of Panel 1: Participants will receive telaprevir 750 mg every 8 hours from Day 1 to Day 9 followed by a single 750-mg dose in the morning on Day 10. Part 2 of Panel 1: Participants will receive phenytoin 200 mg every 12 hours from Day 1 to Day 16 followed by a single 200-mg dose in the morning on Day 17; and telaprevir 750 mg every 8 hours from Day 8 to Day 16 followed by a single 750-mg dose in the morning on Day 17.

Group Type: EXPERIMENTAL

Telaprevir

Intervention Type: DRUG

Type=exact number, unit=mg, number=375, form=tablet, route=oral. Two tablets of telaprevir will be administered as per the dosing regimens for each part of both the panels.

Phenytoin

Intervention Type: DRUG

Type=exact number, unit=mg, number=100, form=capsule, route=oral. Two capsules of phenytoin will be administered as per the dosing regimen in Part 2 of Panel 1.

Panel 2

Part 1 of Panel 2: Participants will receive telaprevir 750 mg every 8 hours from Day 1 to Day 9 followed by a single 750-mg dose in the morning on Day 10. Part 2 of Panel 2: Participants will receive carbamazepine 200 mg every 12 hours from Day 1 to Day 16 followed by a single 200-mg dose in the morning on Day 17; and telaprevir 750 mg every 8 hours from Day 8 to Day 16 followed by a single 750-mg dose in the morning on Day 17.

brief description of the arm. This element may not be necessary if the associated intervention descriptions contain sufficient information to describe the arm.

Group Type: EXPERIMENTAL

Telaprevir

Intervention Type: DRUG

Type=exact number, unit=mg, number=375, form=tablet, route=oral. Two tablets of telaprevir will be administered as per the dosing regimens for each part of both the panels.

Carbamazepine

Intervention Type: DRUG

Type=exact number, unit=mg, number=200, form=tablet, route=oral. One tablet of carbamazepine will be administered as per dosing regimen in Part 2 of Panel 2.

Interventions

Telaprevir

Type=exact number, unit=mg, number=375, form=tablet, route=oral. Two tablets of telaprevir will be administered as per the dosing regimens for each part of both the panels.

Intervention Type: DRUG

Phenytoin

Type=exact number, unit=mg, number=100, form=capsule, route=oral. Two capsules of phenytoin will be administered as per the dosing regimen in Part 2 of Panel 1.

Intervention Type: DRUG

Carbamazepine

Type=exact number, unit=mg, number=200, form=tablet, route=oral. One tablet of carbamazepine will be administered as per dosing regimen in Part 2 of Panel 2.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Must be healthy on the basis of physical examination, medical history, vital signs, clinical laboratory tests, and electrocardiogram performed at screening
• If a woman, before entry she must be postmenopausal for at least 2 years (amenorrheal for at least 3 years), or surgically sterile (have had a total hysterectomy or bilateral oophorectomy, tubal ligation/bilateral tubal clips without reversal operation, or otherwise be incapable of becoming pregnant)
• Men must agree to use a highly effective method of birth control (ie, male condom with either female intrauterine device [IUD], diaphragm, cervical cap or hormone based contraceptives by their female partner) and to not donate sperm during the study and for 3 months after receiving the last dose of study drug
• A 12-lead electrocardiogram consistent with normal cardiac conduction and function

Exclusion Criteria

• Participants with a history of any illness that, in the opinion of the Investigator or the participant's general practitioner, might confound the results of the study or pose an additional risk in administering study drug(s) to the participant
• Participants of Asian ancestry (given association of phenytoin / carbamazepine and severe rash with HLA-B 1502 in this population)
• Current use of prescription medication, and regular use or routine use of concomitant medication(s), including over-the-counter (OTC) products
• Consumption of herbal medications or dietary supplements (eg, St. John's Wort, Ginkgo biloba, garlic supplements), vitamins, and grapefruit or grapefruit juice, apple juice, or orange juice within 14 days before the first administration of study drug
• Consumption of an average of more than five 240-mL servings of coffee or other caffeinated beverage per day

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 55 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Janssen Infectious Diseases BVBA

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Janssen Infectious Diseases BVBA Clinical Trial

Role: STUDY_DIRECTOR

Janssen Infectious Diseases BVBA

Locations

Groningen, , Netherlands

Countries

Netherlands

Other Identifiers

VX-950HPC1002

Identifier Type: OTHER

Identifier Source: secondary_id

2012-001411-23

Identifier Type: EUDRACT_NUMBER

Identifier Source: secondary_id

CR100830

Identifier Type: -

Identifier Source: org_study_id