Chapter 1: Aging and drugs.- Chapter 2: Physiological alterations with aging.- Chapter 3: Quality of care in the elderly.- Chapter 4: Inappropriate drugs in the elderly.- Chapter 5: Drugs and common health conditions in old age.- Chapter 6: Drugs and neuro-psychiatric disorders.- Chapter 7: Errors, problems, events and reactions on medication.- Chapter 8: Practical problems related to the patients medication intake. -Chapter 9: Compliance and Concordance.- Chapter 10: Strategies and interventions for improvement.- Chapter 11: Summary and perspectives.