Alleviation of acetylsalicylic acid-induced fetal toxicity by calcium.

Alleviation of aspirin-induced fetotoxicity by calcium was investigated in rats. ASA (500 mg/kg s.c.) decreased the plasma Ca level in pregnant rats and that in the feto-placenta units. 0.05 M CaCl2 given to dams as tap water on days 8 through 20 of gestation inhibited ASA-induced hypocalcemic effect in maternal plasma. Tap water of 0.002-0.05 M CaCl2, Ca(OH)2 and Ca-lactate on days 8 through 20 of gestation alleviated malformations elicited by the administration of ASA (500 mg/kg s.c.) on the 11th day of gestation resulting in a decrease in the fetotoxicity in rats.