Study of the Pharmacokinetics, Pharmacodynamics, Safety and Tolerability of Fosaprepitant for the Prevention of Chemotherapy-Induced Nausea and Vomiting (CINV) in Children (MK-0517-029)

Study Overview
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Brief Summary
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The purpose of this study was to determine the appropriate dosing regimen of fosaprepitant, when administered with ondansetron (with or without dexamethasone), for the prevention of CINV in children from birth to <17 years of age. Fosaprepitant is a prodrug to aprepitant. All participants who completed the randomized Cycle 1 could elect to receive open-label fosaprepitant during optional Cycles 2-6.

Detailed Description
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Under Amendment 01, 0517-029 enrolled participants in the following age cohorts: 2-<6, 6-<12 and 12-17 years old. The study was randomized, partially-blinded, with parallel group assignment. Participants were randomized to one of three fosaprepitant doses or the control group. (Amendment 02 and Amendment 03 were country-specific amendments in Brazil that were required as per local regulations with no change in study design.) Under Amendment 04, the 12-17 year-old cohort was closed since that cohort fully enrolled. An additional fosaprepitant dose was added and all participants were allocated to this one treatment group. Amendment 04 was open-label and enrolled participants in the following age cohorts: 0-<2, 2-<6 and 6-<12 years old.

Official Title
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A Phase IIb, Partially-Blinded, Randomized, Active Comparator-Controlled Study to Evaluate the Pharmacokinetics/Pharmacodynamics, Safety, and Tolerability of Fosaprepitant in Pediatric Patients for the Prevention of Chemotherapy-Induced Nausea and Vomiting (CINV) Associated With Emetogenic Chemotherapy Sub-title: Open-Label Cohort to Further Evaluate the Pharmacokinetics/Pharmacodynamics, Safety, and Tolerability of Fosaprepitant in Pediatric Patients Birth to <12 Years Old

Conditions
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Chemotherapy-induced Nausea and Vomiting

Intervention / Treatment
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* Drug: Fosaprepitant
* Drug: Fosaprepitant Placebo
* Drug: Ondansetron
* Drug: 5-hydroxytryptamine 3 antagonist


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Is 0 months (at least 37 weeks gestation) to <18 years of age Scheduled to receive chemotherapeutic agent(s) associated with moderate, high, or very high risk of emetogenicity for no more than 5 consecutive days for a documented malignancy, or a chemotherapy regimen not previously tolerated due to vomiting Expected to receive ondansetron as part of antiemetic regimen (Cycle 1); Expected to receive a 5-HT3 antagonist as part of antiemetic regimen (Cycles 2-6) If female and has begun menstruating, must have a negative pregnancy test prior to study participation and agree to remain abstinent or use a barrier form of contraception Predicted life expectancy of ≥3 months Pre-existing functioning central venous catheter Weight ≥3rd percentile for age and gender (and ≥3.0 kg) Exclusion Criteria: Vomited in the 24 hours prior study drug administration (Cycle 1) Current user of any illicit drugs (including marijuana) or current evidence of alcohol abuse Scheduled to receive stem cell rescue therapy in conjunction with study related course(s) of emetogenic chemotherapy Received or will receive radiation therapy to the abdomen or pelvis in the week prior to study drug administration and/or during the course of the study Pregnant or breast feeding Allergic to fosaprepitant, aprepitant, ondansetron, or any other 5-HT3 antagonist Has a symptomatic central nervous system (CNS) tumor causing nausea and/or vomiting Has an active infection, congestive heart failure, slow heart rate, or other uncontrolled disease other than cancer Mentally incapacitated or has a significant emotional or psychiatric disorder Known history of QT prolongation or is taking any medication known to lead to QT prolongation Taking other excluded medications Participated in any previous study of aprepitant or fosaprepitant, or taken an investigational drug within 4 weeks prior to study participation

Ages Eligible for Study
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Maximum Age: 17 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Fosaprepitant 5 mg/kg-Cycle 1<br>Participants were administered intravenous (IV) fosaprepitant at the following weight-adjusted doses: participants 4 months to <12 years old were administered 5 mg/kg (not to exceed 150 mg); participants 1 to <4 months old were administered 2.5 mg/kg; participants 0 to <1 month old were administered 1.25 mg/kg. Participants were also administered IV ondansetron (0.15 mg/kg x 3 doses for children 6 months to 17 years of age or per local standard of care for children <6 months of age), with or without dexamethasone. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: Ondansetron<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: Zofran® Injection;|
| Experimental: Fosaprepitant 3 mg/kg-Cycle 1<br>Participants 12 to 17 years old were administered 150 mg IV fosaprepitant. Participants 2 to <12 years old were administered a weight-adjusted dose of 3 mg/kg (not to exceed 150 mg). Participants were also administered IV ondansetron (0.15 mg/kg x 3 doses for children 6 months to 17 years of age or per local standard of care for children <6 months of age), with or without dexamethasone. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: Ondansetron<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: Zofran® Injection;|
| Experimental: Fosaprepitant 1.2 mg/kg-Cycle 1<br>Participants 12 to 17 years old were administered 60 mg IV fosaprepitant. Participants 2 to <12 years old were administered a weight-adjusted dose of 1.2 mg/kg (not to exceed 60 mg). Participants were also administered IV ondansetron (0.15 mg/kg x 3 doses for children 6 months to 17 years of age or per local standard of care for children <6 months of age), with or without dexamethasone. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: Ondansetron<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: Zofran® Injection;|
| Experimental: Fosaprepitant 0.4 mg/kg-Cycle 1<br>Participants 12 to 17 years old were administered 20 mg IV fosaprepitant. Participants 2 to <12 years old were administered a weight-adjusted dose of 0.4 mg/kg (not to exceed 20 mg). Participants were also administered IV ondansetron (0.15 mg/kg x 3 doses for children 6 months to 17 years of age or per local standard of care for children <6 months of age), with or without dexamethasone. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: Ondansetron<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: Zofran® Injection;|
| Placebo Comparator: Placebo Control-Cycle 1<br>Participants were administered IV normal saline at volume to match age and weight specific doses of fosaprepitant. Participants were also administered IV ondansetron (0.15 mg/kg x 3 doses for children 6 months to 17 years of age or per local standard of care for children <6 months of age), with or without dexamethasone. | Drug: Fosaprepitant Placebo<br>* Administered IV as a single dose<br>Drug: Ondansetron<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: Zofran® Injection;|
| Experimental: Fosaprepitant 5 mg/kg-Cycles 2-6<br>For optional Cycles 2-6, participants from the 5 mg/kg fosaprepitant arm in Cycle 1 were administered fosaprepitant 5 mg/kg IV (or age-adjusted equivalent). For Cycle 2, fosaprepitant was administered IV plus ondansetron with or without dexamethasone. For Cycles 3-6, fosaprepitant was administered IV plus a 5- hydroxytryptamine 3 (5-HT3) antagonist with or without dexamethasone. Participants 1 year or less were required to receive ondansetron in all cycles as the 5-HT3 antagonist. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: 5-hydroxytryptamine 3 antagonist<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: 5-HT3;|
| Experimental: Fosaprepitant 3 mg/kg-Cycles 2-6<br>For optional Cycles 2-6, participants from Cycle 1 fosaprepitant arms (3, 1.2, or 0.4 mg/kg) or Cycle 1 control arm were administered fosaprepitant 3 mg/kg IV (or age-adjusted equivalent). For Cycle 2, fosaprepitant was administered IV plus ondansetron with or without dexamethasone. For Cycles 3-6, fosaprepitant was administered IV plus a 5-HT3 antagonist with or without dexamethasone. | Drug: Fosaprepitant<br>* Administered intravenously (IV) as a single dose<br>* Other names: EMEND® for Injection;Drug: 5-hydroxytryptamine 3 antagonist<br>* Administered IV according to local labeling and/or local standard of care<br>* Other names: 5-HT3;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum Concentration (Cmax) of Aprepitant in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Cmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Time to Maximum Concentration (Tmax) of Aprepitant in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Tmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Area Under the Concentration-time Curve of Aprepitant From Time 0 to Infinity (AUC 0-∞) in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-∞ for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Area Under the Concentration-time Curve of Aprepitant From Time 0 to 24 Hours (AUC 0-24hr) in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-24hr for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Apparent Terminal Half-life (t1/2) of Aprepitant in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The t1/2 for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Concentration of Aprepitant After 24 Hours (C24hr) in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C24hr for aprepitant was determined by measuring aprepitant levels in the time frame of 23 to 25 hours post-infusion. | Approximately 24 hours (from 23 to 25 hours) post-infusion | 
| Concentration of Aprepitant After 48 Hours (C48hr) in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C48hr for aprepitant was determined by measuring aprepitant levels in the time frame of 46 to 50 hours post-infusion. The C48hr was only planned to be measured in the 5 mg/mL dose for each age group. | Approximately 48 hours (from 46 to 50 hours) post-infusion | 
| Apparent Total Body Clearance (CL/F) of Aprepitant in Participants 0 to <2 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The CL/F for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Cmax of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Cmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Tmax of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Tmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-∞ of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-∞ for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-24hr of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-24hr for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| t1/2 of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The t1/2 for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| C24hr of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C24hr for aprepitant was determined by measuring aprepitant levels in the time frame of 23 to 25 hours post-infusion. | Approximately 24 hours (from 23 to 25 hours) post-infusion | 
| C48hr of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C48hr for aprepitant was determined by measuring aprepitant levels in the time frame of 46 to 50 hours post-infusion. The C48hr was only planned to be measured in the 5 mg/mL dose for each age group. | Approximately 48 hours (from 46 to 50 hours) post-infusion | 
| CL/F of Aprepitant in Participants 2 to <6 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The CL/F for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Cmax of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Cmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Tmax of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Tmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-∞ of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-∞ for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-24hr of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-24hr for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| t1/2 of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The t1/2 for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| C24hr of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C24hr for aprepitant was determined by measuring aprepitant levels in the time frame of 23 to 25 hours post-infusion. | Approximately 24 hours (from 23 to 25 hours) post-infusion | 
| C48hr of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C48hr for aprepitant was determined by measuring aprepitant levels in the time frame of 46 to 50 hours post-infusion. The C48hr was only planned to be measured in the 5 mg/mL dose for each age group. | Approximately 48 hours (from 46 to 50 hours) post-infusion | 
| CL/F of Aprepitant in Participants 6 to <12 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The CL/F for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Cmax of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Cmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Tmax of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The Tmax for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-∞ of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-∞ for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| AUC 0-24hr of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The AUC 0-24hr for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| t1/2 of Aprepitant in Participants 12 to 17 Years of Age Hours | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The t1/2 for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| C24hr of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C24hr for aprepitant was determined by measuring aprepitant levels in the time frame of 23 to 25 hours post-infusion. | Approximately 24 hours (from 23 to 25 hours) post-infusion | 
| C48hr of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The C48hr for aprepitant was determined by measuring aprepitant levels in the time frame of 46 to 50 hours post-infusion. The C48hr was only planned to be measured in the 5 mg/mL dose for each age group. | Approximately 48 hours (from 46 to 50 hours) post-infusion | 
| CL/F of Aprepitant in Participants 12 to 17 Years of Age | Fosaprepitant is a pro-drug that is rapidly converted to aprepitant. Because of this rapid conversion to aprepitant, fosaprepitant cannot be assessed directly. The pharmacokinetics for each fosaprepitant dose were determined by analyzing aprepitant in plasma. The CL/F for aprepitant was determined by measuring aprepitant levels at pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion. | Pre-infusion, immediately after infusion, and 2-4, 5-7, 8-10, 23-25, and 46-50 hours post-infusion | 
| Percentage of Participants Who Experienced at Least One Adverse Event (AE) in Cycle 1 | AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which did not necessarily have to have a causal relationship with this treatment. An AE could therefore be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product/protocol specified procedure, whether or not considered related to the medicinal product/protocol specified procedure. Any worsening of a preexisting condition temporally associated with the use of the product was also an AE. | Up to 14 days postdose in Cycle 1 | 
| Percentage of Participants Who Experienced at Least One Adverse Event (AE) in Cycles 2-6 | AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which did not necessarily have to have a causal relationship with this treatment. An AE could therefore be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product/protocol specified procedure, whether or not considered related to the medicinal product/protocol specified procedure. Any worsening of a preexisting condition temporally associated with the use of the product was also an AE. | Up to 14 days postdose for each cycle (Cycles 2-6) |