Abstract
A single subcutaneous injection of 400 mg/kg sodium salicylate produced a high resorption rate on day 13 (91%) and on day 18 (66%) of gestation. Malformations were seen in the surviving fetuses. Pregnant ferrets injected with 250 mg/kg salicylate produced a lower resorption rate of between 31% and 43%. Malformations were seen in the surviving fetuses of animals injected with lower doses of sodium salicylate both at 13 and 18 days of gestation. Salicylate-induced teratogenicity at 400 mg/kg was compared with that produced in a closed colony of Wistar rats. The concentration of salicylate in whole blood (and serum) was determined after a single injection of 125 mg/kg or 400 mg/kg sodium salicylate. Although salicylate concentration in the blood in both species showed remarkable similarity at the doses tested and the times of sampling, the results indicated that the drug was far more embryo-toxic in ferrets than in rats. The inter-order variation in the embryotoxicity of sodium salicylate is such that it would be unwise to ignore its possible teratogenic activity in man.
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