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Nifedipine Pharmacokinetics and Pharmacodynamics When Used as a Tocolytic in Acute Threatened Preterm Labour

NCT02068404 · Status: UNKNOWN · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 75

Last updated 2015-07-28

No results posted yet for this study

Summary

Preterm birth is the leading cause of perinatal mortality and morbidity. According to WHO, 15 million children are born prematurely (gestational age \< 37 weeks) in the world each year while 7% of them die because of complications associated with prematurity. Despite constant improvement of obstetrical care, the number of preterm births has increased over the last decades and prematurity is still the most frequent cause of prenatal hospitalization in industrialized countries.

The American College of Obstetricians and Gynecologists as well as the Royal College of Obstetricians and Gynaecologists recommend nifedipine as a first-line tocolytic in case of acute threatened preterm labour. Clinical experience show however an important variability in treatment response among pregnant women. In spite of its large use in obstetrics as a tocolytic agent, nifedipine is prescribed off-label. As a consequence no international consensus on optimal dose schedule has so far been proposed.

Small sample size and heterogeneousness of tocolysis administration protocols make it difficult to compare the little data available on the pharmacokinetics of nifedipine in pregnant women. Nevertheless an important interindividual variability in concentrations has been identified (CV=12-76%) but very few studies have investigated the possible reasons of this variability in pregnant women. Genetic and environmental factors involved in drug distribution and metabolism (e.g. enzymatic activity, CYP 3A5 genotype) might partially explain variability in drug levels and therefore differences in treatment response.

The goal of this study is to quantify the variability in nifedipine pharmacokinetics and identify potential genetic and non-genetic sources of variability in nifedipine pharmacokinetics in pregnant women. The relationship between concentration and treatment response will be evaluated and will serve to propose optimal dosage regimen to improve efficacy and reduce side effects associated with this treatment.

Conditions

  • Preterm Labor

Interventions

DRUG

Nifedipine

Sponsors & Collaborators

  • Chantal Csajka

    lead OTHER

Principal Investigators

  • Alice Panchaud, PhD · Centre Hospitalier Universitaire Vaudois

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2014-04-30
Primary Completion
2016-01-31
Completion
2016-01-31

Countries

  • Switzerland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02068404 on ClinicalTrials.gov