On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

Two-way analyses of variance were performed on log-transformed values of (AUC [INF]). The factors in the analyses were participant and day. Point estimates and 90% confidence intervals for means and differences between means on the log scale were exponentiated to obtain estimates for geometric means and ratio of geometric means on the original scale.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. (Participants then proceeded through the rest of Cycle 1 and on to further cycles - see the "ixabepilone + rifampin" treatment arm).

Having already received ixabepilone on Day 1 of Cycle 1 (see the "ixabepilone" treatment arm), participants were administered an oral dose of 600 mg rifampin on in the clinic on Day 15. On Days 16-21, participants self-administered rifampin once daily, at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

All participants who were enrolled into the study, 24 hours before ixabepilone administration on Day -1. Each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2 on Day 1 of Cycle 1. Each participant was administered an oral dose of 600 mg of rifampin while in a fasted state on Day 22 (Cycle 2). Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23 through 28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food during Cycle 2.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

Each participant was administered an oral dose of 600 mg of rifampin while in a fasted state on Day 22 (Cycle 2). Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.

On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2.

All treated participants who received at least 1 dose of study drug. On Day 1 of Cycle 1, each participant received a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Day 15, participants were administered an oral dose of 600 mg rifampin in the clinic and on Days 16-21, participants self-administered rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. On Day 22 (Cycle 2), participants were administered an oral dose of 600 mg of rifampin while in a fasted state in the clinic. Participants were then administered a single 3-hour IV infusion of ixabepilone 40 mg/m^2. On Days 23-28, participants self-administered a 600-mg oral dose of rifampin once daily at least 1 hour before or 2 hours after the ingestion of food. During Cycle 3 and beyond, participants received a single 3-hour IV infusion of ixabepilone at a dose of 40 mg/m^2 (unless their dose had been reduced) on Day 1 of each 21-day cycle for a maximum of 6 full cycles.