Freire, A.C.T. Almeida, A.P. Coelho, P.M.Z. Mello, R.T. Pereira, L.H. Pellegrino, J. Castro, C.R. Chloramphenicol-Pentobarbital Interaction. Persistence of the Potentiation effect Subjects--Topical Terms: RATO DE LABORATÓRIOANESTESIA