Addiction has many stages just like any other illness. It is easier to see addiction in those who have progressed to later stages of this disease. Signs and symptoms of SUD's vary from person to person including; abusing drugs/alcohol despite the unwanted consequences, using more than what was intended, increased alcohol consumption, a change in drinking patterns, lying about drinking/using drugs, and the inability to keep a commitment to remain abstinent or to limit the amount consumed. Questioning whether or not you or your loved one could be addicted is a sign of a possible addiction.