Recovering addicts often say that drugs or alcohol were their best friend until it became their worst enemy. Many complex factors are involved with drug addiction, and there is still some ambiguity as to why it affects some more than others. Research points to causes such as genetics, environment, stress and other influences, but understanding exactly why it occurs in every single person is difficult. Statistics do reveal, however, that rehabilitation treatment can benefit addicts substantially. Knowing what to expect is helpful if you are considering entering a treatment program or if you can help someone else understand the facts. Sometimes the hardest part is explaining an addiction to a loved one. Below are some questions we can help you answer.