Drug and medicine- As our understanding of the chemical basis for biology has grown, we have learned more about how molecules which constitute life. Many scientists are beginning to understand the connections between the physical and psychological matters and the molecules that cause them. As a result, we can now use these new understandings of medicine against any dangerous or unpleasant conditions. For example, depression can be treated with drugs that can revive the brain to its normal level.Many medicines and drugs can change someone’s physical and mental conditions, which can improve the risk of sickness and/or death. Proof of how medicine has improved is the fact that the average person today lives about 20 years longer compared to someone living during the beginning of the century. Although drugs have its benefits, they an also have severe addictive and destructive power. Antibiotics- The most prescribed medicines in the United States are the antibiotics, drugs that fight infectious diseases like diphtheria, tuberculosis, cholera, and pneumonia. These diseases are cause by bacteria, which reproduce within the human body. Antibiotics work by attacking the microorganisms and selectively killing each of them. Before antibiotics were available, bacterial infections and similar diseases were among the top causes of death in the United States. Today, many of these diseases have been completely cleared out of its existence from developed nations. Unfortunately, bacterial diseases still claim many lives in Third World countries where antibiotics are less available and conditions are poor.Antibiotics are classified onto several different categories. Some of the most common are penicillin, cephalosporins, and tetracylines. The penicillins were discovered in 1982 by Sir Alexander Fleming, a bacteriologist at the University of London. Penicillin is a fungus that Sir Alexander Fleming discovered after he came back from his vacation. I...
