Aug 1, 1977

Maternal-fetal pharmacology of cefatrizine in the first 20 weeks of pregnancy

Antimicrobial Agents and Chemotherapy
B BernardC A Ballard

Abstract

To evaluate maternal-fetal pharmacology of cefatrizine (BL-S 640), a new oral cephalosporin, a single oral 1,000-mg dose was administered to 33 gravidas (8 to 20 weeks' gestation) at varying intervals within 46 h of an elective therapeutic abortion by hysterectomy or intra-amniotic prostaglandin F(2a) induction. Mean maternal serum concentrations at 1, 2, 4, and 8 h were 3.7, 7.9, 6.5, and 1.6 mug/ml; beyond a 3-h peak, a half-life of 2.4 h was determined. Cefatrizine placental half-life was 4.4 h. None of the 11 fetuses from a prostaglandin F(2a) abortion revealed cefatrizine activity; in contrast, 17 of 22 fetuses from a surgical abortion demonstrated cefatrizine concentrations in two or more samples. Fetal cefatrizine levels were less than 3 mug/g or mug/ml in kidney and urine, less than 2 mug/ml in serum and bile, and less than 2.5 mug/g in lung. After a single maternal dose, cefatrizine has a wide distribution in the fetus in the first half of gestation.

Mentioned in this Paper

Urine
Fetal Structures
Entire Fetus
Lung
Brain
Placenta
BL-S 640
Kidney
Cephalosporins
Cefatrizine

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