Interactions between different bile salts in the biliary excretion of the rat.

In rats the simultaneous infusion of tauroursodeoxycholate and taurocholate resulted in a longer choleretic condition with higher total bile salt and taurocholate excretion rates as compared to taurocholate infusion alone. A similar but weaker response was observed when taurodehydrocholate was simultaneously infused instead of tauroursodeoxycholate. The taurolithocholate induced cholestasis was most markedly prevented when taurocholate, rather than tauroursodeoxycholate, was simultaneously infused. It was suggested that the effect of tauroursodeoxycholate on the biliary excretion of taurocholate appears to differ from that of taurocholate on taurolithocholate excretion.