Billions of people worldwide take medicines every day to treat important diseases. In many cases, however, neither the doctor nor the pharmacist has the time to explain to the patient why a particular drug should be taken, how the drug works and what side effects to expect. Of course, the patient can find "everything" about a particular drug on the Internet. But how reliable and understandable is this information? In addition, most Internet sources do not point out the interrelationships between different diseases and drug interactions. Written by an experienced and well-known textbook author, this book provides an overview of the most common diseases and the