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Effects of antenatal exposure to anorectic drugs
Insights
Anorectic drug use during pregnancy did not increase overall severe congenital anomaly rates. However, amphetamine exposure in early pregnancy was linked to a higher incidence of oral clefts in offspring.
Area of Science:
- Obstetrics and Gynecology
- Teratology
- Pediatric Development
Background:
- Anorectic drugs were historically prescribed to pregnant women.
- Concerns exist regarding the teratogenic potential of these medications.
Purpose of the Study:
- To evaluate the teratogenicity of anorectic drugs (amphetamines, phenmetrazine) in pregnant women.
- To assess the impact of drug exposure on severe congenital anomaly rates and specific birth defects.
Main Methods:
- Prospective, observational study design.
- Inclusion of a large cohort of pregnant women and their children.
- Evaluation of drug exposure timing and congenital anomaly rates up to age five years.
Main Results:
- No significant difference in severe congenital anomaly (SCA) rates between drug-exposed and unexposed children.
- An increased risk of oral clefts observed in offspring whose mothers used amphetamines during the first 56 days of pregnancy.
- Anorectic drugs demonstrated limited short-term efficacy in weight reduction.
Conclusions:
- Overall teratogenic risk for severe congenital anomalies appears low with anorectic drug use.
- Specific risks, such as oral clefts, are associated with early pregnancy amphetamine exposure.
- The efficacy of anorectic drugs for weight management during pregnancy is minimal and short-lived.
Abstract:
In a large prospective, observational study of pregnancy and child development, the anorectic drugs (amphetamines and phenmetrazine) prescribed to gravid women during different stages of pregnancy were evaluated for their teratogenicity. The severe congenital anomaly rate (SCA) per 100 live-born children at age five years did not differ from the SCA rate of the group of children whose mothers did not use these drugs. There was, however, an excess of oral clefts in the offspring of mothers who had amphetamines prescribed in the first 56 days from the last menstrual period. A rought test of efficacy of anorectic drugs by comparing mean weight gains in four-week periods before and after the prescription showed only short-term and limited reduction of weight gain.