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

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.

Arzneimittel: 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.

Andere Namen:

• palbociclib, PD-0332991

Arzneimittel: 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.

Andere Namen:

• palbociclib, PD-0332991, rifampin, rifampicin

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).

Maximum Observed Plasma Concentration (Cmax)

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)

Time to Reach Maximum Observed Plasma Concentration (Tmax)

Plasma Decay Half-Life (t1/2)

Plasma decay half-life is the time measured for the plasma concentration to decrease by one half.

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.

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.