Objective To investigate the pharmacokinetic behaviors and distributions of cyclosporin A in rats by cutaneous delivery of new bicontinuous microemulsion vehicles and oral administration of sandimmum neoral○R.Methods Time courses of drug concentration in blood,liver,kidney,skin and subcutaneous fat were determined after application of microemulsion onto the rat skin non-occlusively.The entrapment of cyclosporin A in rat skin and the distribution of the drug were compared with those in oral administration of...