Why are drugs safe for some people and not others? The reality is that most drugs have at least some potential "side effects." Side effects might be simple rashes, headaches or diarrhea. Sometimes the side effects for a drug can be worse than the problem the medication is supposed to relieve.
How can we improve the effectiveness and safety of medications? It is obvious from our outer appearance that individual human beings are different from one another. These differences are not just "skin deep." The underlying chemistry responsible for processes such as breaking down the food and drugs we ingest can also differ. This variation amongst humans is written into each individual's DNA
