A population-based case-control teratologic study of nitrazepam, medazepam, tofisopam, alprazolum and clonazepam treatment during pregnancy.

Abstract

OBJECTIVE:

To study the association between nitrazepam, medazepam, tofisopam, alprazolum and clonazepam treatments during pregnancy and prevalence of different congenital abnormalities (CAs).

MATERIALS AND METHODS:

A matched case-control study using cases with CAs and population controls from the dataset of the nationwide Hungarian Case-Control Surveillance of Congenital Abnormalities (HCCSCA), 1980-1996.

RESULTS:

Of 38,151 pregnant women who had babies without any defects (population control group), 75 (0.20%) were treated with these five benzodiazepines during pregnancy. Of 22,865 pregnant women who delivered offspring with CAs, 57 (0.25%) had benzodiazepine treatment. The occurrence of five benzodiazepine treatments during the second and third months of gestation, i.e. in the critical period for most major CAs did not show significant differences in matched case-control pairs.

CONCLUSION:

Treatment with five benzodiazepines studied during pregnancy did not present detectable teratogenic risk to the fetus in humans but the amount of information was limited for different CAs.

• Authors: Erika Eros, Andrew E Czeizel, Magda Rockenbauer, Henrik T Sorensen, Jorn Olsen
• Journal: European journal of obstetrics, gynecology, and reproductive biology (Eur J Obstet Gynecol Reprod Biol) Vol. 101 Issue 2 Pg. 147-54 (Mar 10 2002) ISSN: 0301-2115 [Print] Ireland
• PMID: 11858890 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Anti-Anxiety Agents
• Anticonvulsants
• Teratogens
• Benzodiazepines
• Clonazepam
• Nitrazepam
• Medazepam
• tofisopam
• Alprazolam

Topics

• Abnormalities, Drug-Induced (epidemiology)
• Abnormalities, Multiple (chemically induced, epidemiology)
• Adult
• Alprazolam (adverse effects, therapeutic use)
• Anti-Anxiety Agents (adverse effects, therapeutic use)
• Anticonvulsants (adverse effects, therapeutic use)
• Benzodiazepines
• Case-Control Studies
• Clonazepam (adverse effects, therapeutic use)
• Female
• Humans
• Hungary (epidemiology)
• Infant, Newborn
• Medazepam (adverse effects, therapeutic use)
• Nitrazepam (adverse effects, therapeutic use)
• Pregnancy
• Pregnancy Complications (drug therapy, epidemiology)
• Teratogens (toxicity)