Premedication with oral and transdermal clonidine provides safe an efficacious postoperative sympatholysis. - Ellis,J.E.; Drijvers,G.; Pedlow,S.; Laff,S.P.; Sorrentino,M.J.; Foss,J.F.; Shah,M.; Busse,J.R.; Mantha,S.; McKinsey,J.F.; Osinski,J.; Thisted,R.A.; et al. (Anesth. Analg., 1994)