Comparative potencies of codeine and its demethylated metabolites after intraventricular injection in the mouse.
D000818:Animals; D003061:Codeine; D007276:Injections, Intraventricular; D051379:Mice; D009020:Morphine; D009022:Morphine Derivatives
D009022:Morphine Derivatives; D009020:Morphine; D003061:Codeine
CODEINE; MORPHINE