DextromethorphanHoneyDextrorphanAntitussive AgentsLevorphanolCytochrome P-450 CYP2D6Oxidoreductases, O-DemethylatingBeesQuinidineGuaifenesinChlorpheniramineCodeinePerhexilineCytochrome P-450 Enzyme SystemDebrisoquinGastric DilatationMorphinansExcitatory Amino Acid AntagonistsPseudobulbar PalsyReceptors, sigmaExpectorantsMemantineCoughMicrosomes, LiverReceptors, N-Methyl-D-AspartateDealkylationBeekeeping