(1) In white mice, intraperitoneal injections of mixture of procaine (70 mg/ kg/day) and tartar emetic for 14 days reduced the toxicity of tartar emetic, raising the LD_(50) of the latter from 35 to 45 mg/kg/day.

• (一) 普魯卡因(70毫克/千克/天)和吐酒石混合腹腔注射小白鼠14天,能減低吐酒石之毒性,使吐酒石LD_(50)從35升至今5毫克/千克/天。