1. An Introduction to Benzodiazepines 2. Chemical Structure of 1,4-Benzodiazepines 3. Synthesis of 1,4-Benzodiazepines 4. Biological Behavior of 1,4-Benzodiazepines 5. Pharmaceutical Applications of 1,4-Benzodiazepines 6. Chemical Structure of 1,5-Benzodiazepines and 1,5-Benzothiazepines 7. Synthesis of 1,5-Benzodiazepines and 1,5-Benzothiazepines 8. Biological Behavior of 1,5-Benzodiazepines and 1,5-Benzothiazepines 9. Pharmaceutical Applications of 1,5-Benzodiazepines 10. Pharmaceutical Applications of 1,5-Benzothiazepines