A Study to Learn How Different Forms of The Study Medicine Called Phenytoin Are Taken up Into the Blood in Healthy Adults

October 7, 2024 updated by: Pfizer

A PHASE 1, OPEN-LABEL, RANDOMIZED, SINGLE-DOSE, 2-WAY CROSSOVER, PIVOTAL BIOEQUIVALENCE STUDY COMPARING 50-MG CHEWABLE DILANTIN® INFATABS® MANUFACTURED AT VEGA BAJA (PUERTO RICO) AND ASCOLI (ITALY) IN HEALTHY ADULT PARTICIPANTS UNDER FASTING CONDITIONS

The purpose of this study is to understand how the different formulation of phenytoin is taken up into the blood in Healthy Adults.

This study is seeking healthy adult participants. All the study participants will receive Phenytoin 50 mg chewable tablets manufactured at Ascoli and Vega Baja manufacturing site.

We will measure how the phenytoin will be taken up into the blood in Healthy Adults following oral dosing of Phenytoin.

This will help us determine if the Phenytoin 50 mg chewable tablets manufactured at Ascoli and Vega Baja manufacturing site are similar or not.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

35

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Connecticut
      • New Haven, Connecticut, United States, 06511
        • Pfizer Clinical Research Unit - New Haven

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Healthy male participants and female participants of non-childbearing potential aged 18 years or older determined by medical evaluation including detailed medical history, complete physical examination, blood pressure (BP) and pulse rate measurement, 12-lead electrocardiogram (ECG), and/or clinical laboratory tests.
  2. Body mass index (BMI) of 16-32 kg/m2; and a total body weight >45 kg (100 lb).

Exclusion Criteria:

  1. Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing).
  2. Female participants of childbearing potential; pregnant female participants; breastfeeding female participants; male participants with partners currently pregnant; male participants able to father children who, with their partner(s) are at risk for pregnancy and are unwilling or unable to use a highly effective method of contraception.
  3. History of hypersensitivity to phenytoin or its inactive ingredients.
  4. Any medical or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.
  5. Use of prescription or nonprescription drugs and dietary and herbal supplements within 7 days prior to the first dose of study intervention.
  6. Current use of any prohibited concomitant medication(s).
  7. History of febrile illness within 5 days prior to first dose.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Health Services Research
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Phenytoin manufactured at Vega Baja site
Drug: Phenytoin (Vega Baja)
Phenytoin 50mg chewable tablets
Experimental: Phenytoin manufactored at Ascoli site
Drug: Phenytoin (Ascoli)
Phenytoin 50mg chewable tablets

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Area Under the Plasma Concentration-time Profile From Time Zero to the Time of Last Quantifiable Concentration (AUClast)
Time Frame: 72 hours
72 hours
Maximum Observed Plasma Concentration (Cmax) of Phenytoin
Time Frame: 72 hours
72 hours

Secondary Outcome Measures

Outcome Measure
Time Frame
Number of Participants With Adverse Events (AEs) According to Seriousness
Time Frame: Baseline, up to 35 days post last dose.
Baseline, up to 35 days post last dose.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Pfizer

Investigators

  • Study Director: Pfizer CT.gov Call Center, Pfizer

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 3, 2024

Primary Completion (Actual)

October 4, 2024

Study Completion (Actual)

October 4, 2024

Study Registration Dates

First Submitted

June 14, 2024

First Submitted That Met QC Criteria

June 14, 2024

First Posted (Actual)

June 20, 2024

Study Record Updates

Last Update Posted (Actual)

October 8, 2024

Last Update Submitted That Met QC Criteria

October 7, 2024

Last Verified

October 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • A4121018

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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