Reserpine/metabolism; Animals; Biogenic Amines/metabolism; Blood Platelets/metabolism; Chemistry; Dopamine beta-Hydroxylase/metabolism; Feces; History, 16th Century; History, 20th Century; Humans; Hydrolysis; Intestinal Absorption; Lung/metabolism; Mast Cells/metabolism; Membrane Lipids/metabolism; Microsomes, Liver/metabolism; Monoamine Oxidase/metabolism; Oxidation-Reduction; Plants, Medicinal; Rauwolfia/history; Reserpine/pharmacology; Reserpine/urine; Secologanin Tryptamine Alkaloids/analysis; Serotonin/metabolism; Sex Factors; Species Specificity; Subcellular Fractions/metabolism; Sympathetic Nervous System/metabolism; Tetrabenazine; Tyrosine 3-Monooxygenase/metabolism