A Study To Investigate The Drug-Drug Interaction Potential Of Rifampin OnThe Investigational Agent Palbociclib (PD-0332991)

A Phase 1, Open-Label Fixed-Sequence 2-Period Study To Investigate The Effect Of Multiple Doses Of Rifampin On Palbociclib (PD-0332991) Pharmacokinetics In Healthy Volunteers

This study will compare the plasma pharmacokinetics of a single 125mg oral dose of palbociclib in the presence and absence of rifampin-mediated enzyme induction in a fixed-sequence two-period study.

Study Overview

• Status: Completed
• Conditions: Healthy
• Intervention / Treatment: Drug: Palbociclib; Drug: Rifampin

• Study Type: Interventional
• Enrollment (Actual): 15
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Connecticut
    • New Haven, Connecticut, United States, 06511
      • Pfizer Investigational Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 55 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Healthy males or females of non-childbearing potential
• body mass index between 17.5-30.5 kg/m2 with a total body weight greater than 50kg

Exclusion Criteria:

• Evidence or history of any clinically significant physiologic, psychological, or medical conditions
• a positive drug screen or alcohol breath test
• a baseline ECG demonstrating a QTc>450msecs or a QRS interval >120msecs

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Single-Arm Fixed-Sequence; Subjects will receive two different interventions in fixed-sequence two-period study. In the first period the subjects will receive a single-dose of palbociclib. In the second period, subjects will receive 12 days of rifampin and a single dose of palbociclib on day 8. In both periods, subjects will undergo pharmacokinetic sampling at prespecified time points up to 120 hours post palbociclib dose.

Drug: Palbociclib; In period 1, patients will receive a single 125mg oral dose of palbociclib alone. Subjects will undergo palbociclib pharmacokinetic sampling at prespecified time points up to 120 hours post palbociclib dose. In period 2, subjects will receive 12 daily oral doses of 600mg of rifampin and a single 125mg oral dose of palbociclib on day 8. Subjects will undergo palbociclib pharmacokinetic sampling at prespecified time points up to 120 hours post palbociclib dose.; Other Names: palbociclib, PD-0332991; Drug: Rifampin; In period 2, subjects will receive 12 daily oral doses of 600mg of rifampin and a single 125mg oral dose of palbociclib on day 8. Subjects will undergo palbociclib pharmacokinetic sampling at prespecified time points up to 120 hours post palbociclib dose.; Other Names: palbociclib, PD-0332991, rifampin, rifampicin

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Curve From Time Zero to Extrapolated Infinite Time [AUC (0 - 8)]	AUC (0 - 8)= Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - 8). It is obtained from AUC (0 - t) plus AUC (t - 8).	0-120 hours post-dose
Maximum Observed Plasma Concentration (Cmax)		0-120 hours post-dose

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast)	Area under the plasma concentration time-curve from zero to the last measured concentration (AUClast)	0-120 hours post-dose
Time to Reach Maximum Observed Plasma Concentration (Tmax)		0-120 hours post-dose
Plasma Decay Half-Life (t1/2)	Plasma decay half-life is the time measured for the plasma concentration to decrease by one half.	0-120 hours post-dose
Apparent Oral Clearance (CL/F)	Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed. Clearance was estimated from population pharmacokinetic (PK) modeling. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.	0-120 hours post-dose
Apparent Volume of Distribution (Vz/F)	Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Apparent volume of distribution after oral dose (Vz/F) is influenced by the fraction absorbed.	0-120 hours post-dose

Collaborators and Investigators

• Sponsor: Pfizer

Publications and helpful links

Helpful Links

• To obtain contact information for a study center near you, click here.

Study record dates

Study Major Dates

• Study Start: October 1, 2013
• Primary Completion (Actual): January 1, 2014
• Study Completion (Actual): January 1, 2014

Study Registration Dates

• First Submitted: September 26, 2013
• First Submitted That Met QC Criteria: September 26, 2013
• First Posted (Estimate): October 1, 2013

Study Record Updates

• Last Update Posted (Estimate): January 20, 2014
• Last Update Submitted That Met QC Criteria: January 16, 2014
• Last Verified: January 1, 2014

More Information

Terms related to this study

• Keywords: PD-0332991; palbociclib; rifampin; drug-drug interaction study
• Additional Relevant MeSH Terms: Molecular Mechanisms of Pharmacological Action; Anti-Infective Agents; Nucleic Acid Synthesis Inhibitors; Enzyme Inhibitors; Antineoplastic Agents; Anti-Bacterial Agents; Protein Kinase Inhibitors; Leprostatic Agents; Cytochrome P-450 Enzyme Inducers; Cytochrome P-450 CYP3A Inducers; Antitubercular Agents; Antibiotics, Antitubercular; Cytochrome P-450 CYP2B6 Inducers; Cytochrome P-450 CYP2C8 Inducers; Cytochrome P-450 CYP2C19 Inducers; Cytochrome P-450 CYP2C9 Inducers; Palbociclib; Rifampin
• Other Study ID Numbers: A5481017