Effect of amoxicillin, cephalexin, and tetracycline-HCl on intestinal L-leucine transport in the rat in vivo.

By utilising an in vivo technique the effects of amoxicillin, cephalexin, and tetracycline-HCl on intestinal L-leucine absorption were studied in the rat. The results showed that amoxicillin caused a time-dependent and reversible inhibition of L-leucine transport while the inhibition induced by the other two antibiotics tested was not reversible. Light microscopic studies revealed that the three antibiotics were without effect on intestinal mucosal morphology.