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General Pregnancy Information
Pseudoephedrine-triprolidine has not been formally assigned to a pregnancy category by the FDA. There are no controlled data in human pregnancy. Pseudoephedrine-triprolidine is only recommended for use during pregnancy when benefit outweighs risk.
Pseudoephedrine has not been formally assigned to a pregnancy category by the FDA. Animal studies have not been reported. There are no controlled data in human pregnancy. Based on available data, pseudoephedrine is not thought to be teratogenic.
Triprolidine has been assigned to pregnancy category C by the FDA. There are no controlled data in human pregnancy.
Specific Pregnancy Information
A case-controlled surveillance study reported an elevated relative risk (3.2) of gastroschisis with first-trimester pseudoephedrine use in 76 cases. Relative risks for other drugs were 1.6 for salicylates, 1.7 for acetaminophen, 1.3 for ibuprofen, and 1.5 for phenylpropanolamine (not significant). The authors hypothesized vascular disruption was the etiology of gastroschisis. A second group of 416 infants with heterogeneous defects suspected to have a vascular etiology were reviewed. There was no increased risk associated with salicylates, ibuprofen, pseudoephedrine, phenylpropanolamine or other decongestants. These data require independent confirmation.
In a review of 229,101 deliveries to Michigan Medicaid patients, 940 first-trimester exposures to pseudoephedrine were recorded and 1919 exposures anytime during pregnancy. A total of 37 birth defects were reported with first trimester exposure (40 expected) and included (observed/expected) 3/9 cardiovascular defects, 2 oral clefts, and 3/2 polydactyly. These researchers reviewed nine cases of abdominal wall defects in the 1980-1983 Medicaid data. Seven of the nine cases occurred in 3752 woman who had taken pseudoephedrine for a relative risk of 1.8. Only one of these cases was a surgically treated abdominal wall defect. (written communication, Franz Rosa, MD, Food and Drug Administration, 1994).
The Collaborative Perinatal Project monitored 50,282 mother-child pairs. Only 39 first-trimester exposures to pseudoephedrine were recorded, with one birth defect observed. For use anytime during pregnancy, 194 exposures were recorded with 3 birth defects observed (3.22 expected).
The effect of pseudoephedrine on uterine and fetal blood was studied in 12 healthy pregnant women between 26 and 40 weeks gestation. Following a single 60 mg dose of pseudoephedrine, no significant effect was seen on fetal heart rate, uterine blood flow, or fetal aortic blood flow.
The FDA-assigned pregnancy categories as used in the Drug Formulary
are as follows:
Category A
Adequate and well-controlled studies have failed to demonstrate a risk
to the fetus in the first trimester of pregnancy (and there is no evidence
of risk in later trimesters).
Category B
Animal reproduction studies have failed to demonstrate a risk to the
fetus and there are no adequate and well-controlled studies in pregnant
women.
Category C
Animal reproduction studies have shown an adverse effect on the fetus
and there are no adequate and well-controlled studies in humans, but
potential benefits may warrant use of the drug in pregnant women
despite potential risks.
Category D
There is positive evidence of human fetal risk based on adverse
reaction data from investigational or marketing experience or studies
in humans, but potential benefits may warrant use of the drug in
pregnant women despite potential risks.
Category X
Studies in animals or humans have demonstrated fetal abnormalities
and/or there is positive evidence of human fetal risk based on adverse
reaction data from investigational or marketing experience, and the
risks involved in use of the drug in pregnant women clearly outweigh
potential benefits.
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