Topics: Drug Therapy, Pharmacokinetics, Drug–Receptor Interactions, Pharmacodynamics, Autonomic Nervous System, Cholinergic Agonists, Cholinergic Antagonists, Adrenergic Agonists, Adrenergic Antagonists, Neurodegenerative Diseases, Anxiolytic drugs, Hypnotic Drugs, Antidepressants, Antipsychotic Drugs, Anesthetics, Opioids, CNS Stimulants, Antihypertensives, diuretics, Heart Failure, epilepsy, Antiarrhythmics, Antianginal Drugs, Anticoagulants, Antiplatelet Agents, Hyperlipidemia, Endocrine System, Pituitary, Thyroid, diabetes, estrogen, androgen, adrenal hormone, bone metabolism, Chemotherapeutic Drugs, Antimicrobial Therapy, Cell Wall Inhibitors, Protein Synthesis Inhibitors, Quinolones, Folic Acid Antagonists, Urinary Tract Antiseptics, Antimycobacterial Drugs, Antifungal Drugs, Antiviral Drugs, Anticancer Drugs, Immunosuppressants, Histamine, Serotonin, Anti-inflammatory Agents, Antipyretic Agents, Analgesic Agents, Gastrointestinal drugs, Antiemetic Drugs, Urologic Disorders, anemia, Dermatologic Disorders, Clinical Toxicology, drugs of abuse, Antiprotozoal Drugs, Anthelmintic Drugs