The content of gentamycin in serum and brain tissue of rats was deter-mined with the measure of RIA, and the influence of intragastric feeding ofborneol on the passing of gentamycin through blood-brain barrier was studied.The results showed that borneol can increase the concentration of gentamycinin the brain of rats significantly (p<0.01), suggesting that borneol can increasethe perfneability of blood-brain barrier. This provides an experimental basisfor the evidence that borneol may serve as a“gudiding dr...