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Safety of efavirenz in first-trimester of pregnancy: a systematic review and meta-analysis of outcomes from observational cohorts | Journal Article / Research | MSF Science Portal
Journal Article
|Research

Safety of efavirenz in first-trimester of pregnancy: a systematic review and meta-analysis of outcomes from observational cohorts

Ford NP, Mofenson L, Kranzer K, Medu L, Frigati L, Mills EJ, Calmy A
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Abstract
INTRODUCTION
Primate studies and some observational human data have raised concern regarding an association of first-trimester efavirenz exposure with central nervous system congenital anomalies. The objective of this review is to update evidence on efavirenz safety in HIV-infected pregnant women to inform revision of the 2013 WHO guidelines for antiretroviral therapy in low and middle-income countries.

DESIGN
A systematic review and meta-analysis.

METHODS
We searched for studies reporting birth outcomes among women exposed to efavirenz during the first trimester of pregnancy up to 10 January 2014. Relative risks of congenital anomalies comparing women exposed to efavirenz and nonefavirenz-based antiretroviral regimens were pooled using random effects meta-analysis.

RESULTS
Twenty-three studies were included in this review, among which 21 reported the birth outcomes of 2026 live births among women exposed to efavirenz during the first trimester of pregnancy. Forty-four congenital anomalies were reported, giving a pooled proportion of 1.63% [95% confidence interval (95% CI) 0.78-2.48], with only one neural tube defect. Twelve studies reported birth outcomes of women exposed to efavirenz or nonefavirenz-containing regimens during the first trimester of pregnancy. Pooled analysis found no differences in overall risks congenital anomalies between these two groups (relative risk 0.78, 95% CI 0.56-1.08). The incidence of neural tube defects was low, 0.05% (95% CI <0.01-0.28), and similar to incidence in the general population.

DISCUSSION
This updated analysis found no evidence of an increased risk of overall or central nervous system congenital anomalies associated with first-trimester exposure to efavirenz, similar to previous systematic reviews. This review contributed to the evidence base for the revised 2013 WHO guidelines on antiretroviral therapy, which recommend that efavirenz can be included as part of first-line therapy in adults regardless of sex, and that it can be used throughout pregnancy, including during the first trimester. However, because of the low incidence of central nervous system anomalies in the overall population and relatively small number of exposures in the current literature, continued birth outcomes prospective surveillance is warranted.

Countries

Botswana Brazil Côte d'Ivoire France Italy South Africa Spain United Kingdom United States of America

Subject Area

women's healthHIV/AIDS

Languages

English
DOI
10.1097/QAD.0b013e32833a2a14
Published Date
19 Jun 2010
PubMed ID
20479637
Journal
AIDS
Volume | Issue | Pages
Volume 24, Issue 10
Issue Date
2010-06-19
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