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[Benzodiazepines and pregnancy].

M C Pérault1, S Favrelière, P Minet

  • 1Service de Pharmacologie Clinique, CRPV, CHU La Milétrie, 350 avenue Jacques Coeur BP 577, 86021 Poitiers, France.

Therapie
|February 24, 2001
PubMed
Summary

Benzodiazepine use during pregnancy poses minimal risk for fetal malformations. However, prolonged exposure, especially to long-acting types, may cause neonatal issues like hypotonicity and withdrawal symptoms.

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Area of Science:

  • Pharmacology
  • Teratology
  • Neonatal Medicine

Background:

  • Benzodiazepine prescriptions are common among pregnant women, with self-medication being a significant factor.
  • Understanding the potential fetal impacts of maternal benzodiazepine use is crucial for prenatal care.

Purpose of the Study:

  • To evaluate the effects of benzodiazepine exposure on the fetus during pregnancy.
  • To synthesize findings from animal studies, clinical data, and pharmacovigilance observations.

Main Methods:

  • A comprehensive review of existing animal and clinical studies was conducted.
  • Data from Centres Régionaux de Pharmacovigilance (CRPV) observations were incorporated.
  • Pooled analysis of available research was performed to assess risks.

Main Results:

  • The risk of congenital malformations from first-trimester benzodiazepine exposure appears to be low.
  • Neonatal complications, including hypotonicity, feeding difficulties, and withdrawal syndrome, were observed in cases of long-term, particularly long-acting benzodiazepine exposure.

Conclusions:

  • While first-trimester benzodiazepine exposure carries a small risk of malformations, prolonged exposure presents risks for neonatal adaptation.
  • Careful consideration and monitoring are warranted for pregnant women using benzodiazepines, especially long-acting formulations.

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