Basically, both the drug rehab program and the substance abuse program in Maine are targeted at bringing the person away from a dependency and making them live in sobriety. In that sense, both are parts of the addiction treatment program in Maine. But there are definitely differences in the ways these programs are implemented.
Substance abuse happens when a person uses a substance to an extent that his or her body cannot afford. When we speak of substance abuse, we usually want to say that the person is not totally dependent on the substance, but is still using it to an extent that is harming his or her biological and psychological system. Such a person may not be using the substance on a regular basis too, but when they do it, it can cause problems. Substance abuse programs are targeted at pulling such people out of their condition. These programs are not so much about detox as they are about counseling. The person is coached on how to wear off the addiction.
Drug rehab in Maine is a much more difficult and aggressive condition. This does need a lot of care because the person has become so much entrenched into the habit of using the substance that medical as well as non-medical help is needed. This begins with an intensive detox program and then continues with a very carefully laid out counseling program. These two aspects of the treatment may be conducted in the same center or these may be done in different centers of addiction treatment in Maine.