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Un estudio para aprender sobre el medicamento (PF-07321332 o nirmatrelvir/ritonavir) en mujeres lactantes sanas

28 de abril de 2026 actualizado por: Pfizer

UN ESTUDIO FARMACOCINÉTICO DE FASE I, DE DOSIS MÚLTIPLES, ABIERTO DE NIRMATRELVIR/RITONAVIR EN MUJERES SALUDABLES LACTANTES

El objetivo principal de este estudio es medir el nivel del ingrediente activo del medicamento del estudio (nirmatrelvir) que se secreta en la leche materna humana cuando se administra a mujeres sanas que amamantan. El medicamento del estudio consta de dos medicamentos, nirmatrelvir y ritonavir. Estamos buscando participantes femeninas que sean:

  • Lactancia materna activa (lactante) al menos 12 semanas después del parto;
  • Edad entre 18 a 55 años y no embarazada actualmente;
  • Tener un Índice de Masa Corporal (IMC): 17,5 kg/m2; y un peso corporal total >50 kg (110 lb).

Los participantes tomarán el medicamento del estudio por vía oral un total de 3 veces durante 2 días (2 dosis por la mañana y 1 dosis por la noche) en la clínica del estudio. Recogeremos periódicamente la leche materna del día 2 al 4 para medir el nivel de nirmatrelvir y ritonavir en ella. Se realizará una llamada de seguimiento de seguridad alrededor de 28 a 35 días después de la última dosis para monitorear cualquier reacción que los participantes puedan tener al medicamento del estudio.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Tipo de estudio

Intervencionista

Inscripción (Actual)

8

Fase

  • Fase 1

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

  • Bélgica
    • Bruxelles-capitale, Région de
      • Brussels, Bruxelles-capitale, Région de, Bélgica, B-1070
        • Pfizer Clinical Research Unit - Brussels

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 55 años (Adulto)

Acepta Voluntarios Saludables

Sí

Descripción

Criterios de inclusión:

  • Mujeres lactantes sanas que están amamantando activamente o extrayéndose leche materna, al menos 12 semanas después del parto y que no están embarazadas actualmente entre 18 y 55 años
  • Índice de Masa Corporal (IMC): 17,5 kg/m2; y un peso corporal total >50 kg (110 lb)
  • Los bebés de las mujeres inscritas en el estudio deben poder alimentarse satisfactoriamente con un biberón u otro método de alimentación alternativo apropiado para su edad antes del inicio del estudio y deben poder tolerar la fórmula infantil si la madre no tiene un suministro de leche materna almacenada. leche suficiente para cubrir la duración del estudio
  • Los participantes deben estar dispuestos a dejar de amamantar temporalmente a sus bebés durante un total de 4,5 días (108 horas)
  • Las participantes deben estar dispuestas a extraerse leche regularmente durante el estudio y extraerse la leche de acuerdo con un programa diseñado para mantener la lactancia durante todo el período del estudio.

Criterio de exclusión:

  • Resultado positivo de la prueba (RT-PCR) para la infección por SARS-CoV-2 en el momento de la detección o el Día -1
  • Evidencia o historial de hallazgos clínicamente significativos
  • Antecedentes de enfermedad febril o mastitis dentro de los 5 días anteriores a la primera dosis del medicamento del estudio
  • Participantes que hayan recibido una vacuna contra el COVID-19 dentro de los 7 días antes de la selección o la admisión, o que vayan a recibir una vacuna contra el COVID-19 en cualquier momento durante el período de confinamiento del estudio
  • Antecedentes de infección por VIH, hepatitis B o hepatitis C; Pruebas positivas para VIH, HBsAg o HCVAb. Se permite la vacunación contra la hepatitis B.
  • Signos vitales anormales, como presión arterial, electrocardiograma de 12 derivaciones
  • Antecedentes de abuso de alcohol y/o consumo de drogas ilícitas, consumo de tabaco en exceso de 5 cigarrillos/día o 2 mascados/día
  • Donación de sangre dentro de los 60 días

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Otro
  • Asignación: N / A
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: nirmatrelvir/ritonavir
nirmatrelvir/ritonavir se administrará por vía oral dos veces al día en forma de tableta
Droga: nirmatrelvir
nirmatrelvir/ritonavir
Otros nombres:
  • PF-07321332/ritonavir
Droga: ritonavir
nirmatrelvir/ritonavir
Otros nombres:
  • PF-07321332/ritonavir

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
The Maximum Observed Concentration of Nirmatrelvir in Breast Milk Over the Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The maximum observed concentration and was directly observed from data.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Time to Reach Cmax of Nirmatrelvir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Cmax was defined as maximum observed concentration of nirmatrelvir in breast milk.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Area Under the Concentration-Time Profile From Time Zero to End of Dosing Interval for Nirmatrelvir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Area under the concentration curve for nirmatrelvir in breast milk from time 0 to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Terminal Half-Life of Nirmatrelvir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The time measured for the breast milk nirmatrelvir concentration to decrease by one half.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Average Steady State Concentration of Nirmatrelvir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The average concentration across time and can be calculated by dividing AUCtau by time. AUCtau was defined area under the concentration curve from time 0 to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Amount of Nirmatrelvir Excreted in Breast Milk Over the Dosing Interval Tau
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The amount of nirmatrelvir excreted into breast milk over the dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Percent of Amount of Nirmatrelvir Excreted in Breast Milk Over The Dosing Interval Tau
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The percent of nirmatelvir excreted in breast milk to amount of breast milk over the dosing interval .
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Breast Milk Clearance of Nirmatrelvir
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Clearance was defined as the apparent volume (Liter) of breast milk completely cleared the nirmatrelvir per hour.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
The Maximum Observed Concentration of Ritonavir in Breast Milk Observed Over the Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The maximum observed concentration and was directly observed from data.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Time to Reach Cmax of Ritonavir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Cmax was defined as maximum observed concentration of ritonavir in breast milk.
At Day -1 (24 Hours Prior to Dosing on Day 1), 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Area Under the Concentration-Time Profile for Ritonavir in Breast Milk From Time Zero to End of Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Area under the concentration curve for ritonavir in breast milk from time 0 to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Half-Life of Ritonavir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The time measured for the breast milk ritonavir concentration to decrease by one half.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Average Steady State Concentration of Ritonavir in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The average concentration across time and can be calculated by dividing AUCtau by time. AUCtau was defined area under the concentration curve from time 0 to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Amount of Ritonavir Excreted in Breast Milk Over the Dosing Interval Tau
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The amount of ritonavir excreted into breast milk over the dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Percent of Ritonavir Excreted in Breast Milk Over The Dosing Interval Tau
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The percent of ritonavir excreted in breast milk to amount of breast milk over the dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Breast Milk Clearance of Ritonavir
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Clearance was defined as the apparent volume (L) of breast milk completely cleared the ritonavir per hour.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The Maximum Observed Concentration of Nirmatrelvir in Plasma Observed Over the Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The maximum observed concentration and was directly observed from data.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The Maximum Observed Concentration of Ritonavir in Plasma Observed Over the Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The maximum observed concentration and was directly observed from data.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Area Under the Concentration-Time Profile for Nirmatrelvir in Plasma From Time Zero to End of Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Area under the concentration curve for nirmatrelvir in breast milk from time 0 to end of dosing interval.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Area Under the Concentration-Time Profile for Ritonavir in Plasma From Time Zero to End of Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Area under the concentration curve for ritonavir in plasma from time 0 to end of dosing interval.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Half-Life of Nirmatrelvir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The time measured for the plasma nirmatrelvir concentration to decrease by one half.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Half-Life of Ritonavir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The time measured for the plasma ritonavir concentration to decrease by one half.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The Minimum Plasma Concentration of Nirmatrelvir Observed Over the Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The minimum observed concentration and was directly observed from data.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The Minimum Plasma Concentration of Ritonavir Observed Over the Dosing Interval
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The minimum observed concentration and was directly observed from data.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Time to Reach Cmax of Nirmatrelvir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Cmax was defined as maximum observed concentration of nirmatrelvir in plasma.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Time to Reach Cmax of Ritonavir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Cmax was defined as maximum observed concentration of ritonavir in plasma.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Apparent Clearance of Nirmatrelvir From Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Clearance was defined as the apparent volume (L) of plasma completely cleared the nirmatrelvir per hour.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Apparent Clearance of Ritonavir From Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Clearance was defined as the apparent volume (L) of plasma completely cleared the ritonavir per hour.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Apparent Volume of Nirmatrelvir Distribution
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Volume of distribution was 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 was influenced by the fraction absorbed.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Apparent Volume of Ritonavir Distribution
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Volume of distribution was 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 was influenced by the fraction absorbed.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The Average Steady State Concentration of Nirmatrelvir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The average concentration across time and can be calculated by dividing AUCtau by time. AUCtau was defined area under the concentration curve from time 0 to end of dosing interval.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The Average Steady State Concentration of Ritonavir in Plasma
Periodo de tiempo: At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
The average concentration across time and can be calculated by dividing AUCtau by time. AUCtau was defined area under the concentration curve from time 0 to end of dosing interval.
At 0, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 18, 24, 32, 40, 48 Hours Post Dose on Day 2
Daily (24 Hour) Amount of Nirmatrelvir Excreted in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Amount of nirmatrelvir excreted in breast milk in 24 hours.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Daily (24 Hour) Amount of Ritonavir Excreted in Breast Milk
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Amount of ritonavir excreted in breast milk in 24 hours.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Milk to Plasma Ratio of Nirmatrelvir for AUCtau During Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The ratio of area under the concentration-time profile for nirmatrelvir in milk to those in plasma from time zero to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Milk to Plasma Ratio of Ritonavir for AUCtau During Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The ratio of area under the concentration-time profile for ritonavir in milk to those in plasma from time zero to end of dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Milk to Plasma Ratio of Nirmatrelvir for Cmax During Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The ratio of the maximum concentration of nirmatrelvir in breast milk to those in plasma observed over the dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Milk to Plasma Ratio of Ritonavir for Cmax During Dosing Interval
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
The ratio of the maximum concentration of ritonavir in breast milk to those in plasma observed over the dosing interval.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Body Weight Normalized Infant Dose (BWNID) of Nirmatrelvir in mg/kg/Day
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNID = MPAUCtau * Cav * 150 mL/kg/day, where 150 mL/kg/day^2 is the standardized milk consumption for an infant. MPAUCtau: Milk to plasma ratio for AUCtau. Cav: Average concentration.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNID of Ritonavir in mg/kg/Day
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNID = MPAUCtau * Cav * 150 mL/kg/day, where 150 mL/kg/day^2 is the standardized milk consumption for an infant. MPAUCtau: Milk to plasma ratio for AUCtau. Cav: Average concentration.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Body Weight Normalized Maternal Dose (BWNMD) of Nirmatrelvir in mg/kg/Day
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Maternal dose in mg/day (300 mg BID = 600 mg/day for nirmatrelvir and 100 mg BID = 200 mg/day for ritonavir) / maternal weight in kg at screening.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNMD of Ritonavir in mg/kg/Day
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Maternal dose in mg/day (300 mg BID = 600 mg/day for nirmatrelvir and 100 mg BID = 200 mg/day for ritonavir) / maternal weight in kg at screening.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Infant Dose Expressed As % of Body Weight Normalized Maternal Dose (BWNIDPCM) for Nirmatrelvir
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNIDPCM = 100 * BWNID / BWNMD.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNIDPCM for Ritonavir
Periodo de tiempo: At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
BWNIDPCM = 100 * BWNID / BWNMD.
At Day -1 (24 Hours Prior to Dosing on Day 1), Pre-dose on Day 1, 0 to 2, 2 to 4, 4 to 8, 8 to 12, 12 to 24, 24 to 32, 32 to 40 and 40 to 48 Hours Post-dose on Day 2
Number of Participants With Treatment Emergent Adverse Events
Periodo de tiempo: From the first dose of study treatment on Day 1 to up to 28 days after the last dose of study intervention on Day 2 (maximum to 30 days)
An adverse event (AE) was any untoward medical occurrence in a participant or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. AEs might arise from symptoms or other complaints reported to the investigator by the participant (or, when appropriate, by a caregiver, surrogate, or the participant's legally authorized representative), or they might arise from clinical findings of the investigator or other healthcare providers (clinical signs, test results, etc.). TEAEs were those with initial onset or increasing in severity after the first dose of study treatment.
From the first dose of study treatment on Day 1 to up to 28 days after the last dose of study intervention on Day 2 (maximum to 30 days)
Number of Participants With Laboratory Abnormalities (Without Regard to Baseline Abnormality)
Periodo de tiempo: At Screening (Day -28 to Day -2), Day -1, and Day 4
The laboratory abnormality parameters included urinalysis: urine bilirubin (>=1), urine hemoglobin (>=1) and leukocyte esterase (>=1).
At Screening (Day -28 to Day -2), Day -1, and Day 4
Number of Participants With Vital Signs Abnormalities
Periodo de tiempo: At Screening (Day -28 to Day -2), Pre-dose and 12 Hours post-dose on Day 1, Pre-dose and 48 Hours Post-dose on Day 2
Single supine blood pressure (BP), and pulse rate (PR) were performed following approximately a 5-minute rest in a supine position. BP, and PR assessments will be performed after collection of electrocardiogram (ECGs) and prior to collection of blood draws if scheduled at the same time. Vital signs abnormality included supine systolic BP <90mmHg.
At Screening (Day -28 to Day -2), Pre-dose and 12 Hours post-dose on Day 1, Pre-dose and 48 Hours Post-dose on Day 2
Number of Participants With ECG Abnormalities
Periodo de tiempo: At Screening (from Day -28 to Day -2)
Standard 12-lead ECGs utilizing limb leads (with a 10 second rhythm strip) were collected. All ECG assessments were made after at least a 5-minute rest in a supine position and prior to any blood draws or vital sign measurements.
At Screening (from Day -28 to Day -2)
Number of Participants With Physical Examination Abnormalities
Periodo de tiempo: At Screening (from Day -28 to Day -2) or Day -1
Physical examination included height, weight and body mass index (BMI, BMI = weight [kg] / height [m^2]) obtained for eligibility criteria. Physical examination abnormalities: BMI <17.5 kg/m^2; and a total body weight <=50 kg (110 lb).
At Screening (from Day -28 to Day -2) or Day -1

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Pfizer

Investigadores

  • Director de estudio: Pfizer CT.gov Call Center, Pfizer

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Enlaces Útiles

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

12 de diciembre de 2022

Finalización primaria (Actual)

15 de diciembre de 2023

Finalización del estudio (Actual)

15 de diciembre de 2023

Fechas de registro del estudio

Enviado por primera vez

28 de junio de 2022

Primero enviado que cumplió con los criterios de control de calidad

28 de junio de 2022

Publicado por primera vez (Actual)

1 de julio de 2022

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

1 de mayo de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

28 de abril de 2026

Última verificación

1 de abril de 2026

Más información

Términos relacionados con este estudio

Palabras clave

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • C4671039
  • 2022-001020-15 (Número EudraCT)

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

Pfizer brindará acceso a los datos individuales de los participantes anonimizados y a los documentos del estudio relacionados (p. protocolo, Plan de Análisis Estadístico (SAP), Informe de Estudio Clínico (CSR)) a solicitud de investigadores calificados, y sujeto a ciertos criterios, condiciones y excepciones. Se pueden encontrar más detalles sobre los criterios de intercambio de datos de Pfizer y el proceso para solicitar acceso en: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

Sí

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

producto fabricado y exportado desde los EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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