Drug FDA use-in-
pregnancy rating
[dagger]
Crosses placenta Major maternal toxicities Fetal toxicities Lactation Fertility

Aspirin C; D in third trimester Yes Anemia, peripartum hemorrhage, prolonged labor Premature closure of ductus, pulmonary hypertension, ICH Use cautiously; excreted at low concentration; doses >1 tablet (325 mg) result in high concentrations in infant plasma No data
NSAIDs B; D in third trimester Yes As for aspirin As for aspirin Compatible according to AAP No data
Corticosteroids
Prednisone
Dexamethasone
B
C
Dexamethasone and beta-methasone Exacerbation of diabetes and hypertension, PROM IUGR 5-20% of maternal dose excreted in breast milk; compatible, but wait 4 hours if dose >20 mg No data
Hydroxychloroquine C Yes: fetal concentration 50% of maternal Few Few Contraindicated (slow elimination rate, potential for accumulation) No data
Gold C Yes No data 1 report of cleft palate and severe CNS abnormalities Excreted into breast milk (20% of maternal dose); rash, hepatitis, and hematologic abnormalities reported, but AAP considers it compatible No data
D-penicillamine D Yes No data Cutis laxa connective tissue abnormalities No data No data
Sulfasalazine B; D if near term Yes No data No increase in congenital malformations, kernicterus if administered near term Excreted into breast milk (40- 60% maternal dose); bloody diarrhea in 1 infant; AAP recommends caution Females: no effect; males: significant oligospermia (2 months to return to normal)
Azathioprine D Yes No data IUGR (rate up to 40%) and prematurity, transient immunosuppression in neonate, possible effect on germlines of offspring No data; hypothetical risk of immunosuppression outweighs benefit Not studied; can interfere with effectiveness of IUD
Chlorambucil D Teratogenic effects potentiated by caffeine No data Renal angiogenesis Contraindicated No data
Methotrexate X No data Spontaneous abortion Fetal abnormalities (including cleft palate and hydrocephalus) Contraindicated; small amounts excreted with potential to accumulate in fetal tissues Females: infrequent long-term effect; males: reversible oligospermia
Cyclophosphamide D Yes: 25% of maternal level No data Severe abnormalities; case report: male twin developed thyroid papillary cancer at 11 years and neuroblastoma at 14 years Contraindicated; has caused bone marrow depression Females: age >25 years, concurrent radiation, and prolonged exposure increase risk of infertility; males: dose-dependent oligospermia and azoospermia regardless of age or exposure
Cyclosporin A C Yes No data IUGR and prematurity; 1 case report: hypoplasia of right leg; not an animal teratogen and unlikely to be a human one Contraindicated due to potential for immunosuppression No data

* ICH = intracranial hemorrhage; AAP = American Academy of Pediatrics; PROM = premature rupture of membranes; IUGR = intrauterine growth retardation; CNS = central nervous system; IUD = intrauterine device.

[dagger] Food and Drug Administration (FDA) use-in-pregnancy ratings are as follows: A = Controlled studies show no risk. Adequate, well-controlled studies in pregnant women have failed to demonstrate risk to the fetus. B = No evidence of risk in humans. Either animal findings show risk but human findings do not, or, if no adequate human studies have been performed, animal findings arenegative. C = Risk cannot be ruled out. Human studies are lacking and results of animal studies are either positive for fetal risk or lacking as well. However, potential benefits may justify the potential risk. D = Positive evidence of risk. Investigational or post-marketing data show risk to the fetus. Nevertheless, potential benefits may outweigh the potential risk. X = Contraindicated in pregnancy. Studies in animals or humans, or investigational or post-marketing reports, have shown fetal risk which clearly outweighs any possible benefit to the patient.