Final answer:
C-III drugs are those with a recognized medical use and a moderate to low risk of physical dependence or high risk of psychological dependence. Drug abuse leads to drug addiction, which is the compulsive use of a substance despite its harmful consequences. Dependence can be physical or psychological, characterized by withdrawal symptoms upon cessation.
Step-by-step explanation:
C-III drugs refer to the classification of certain substances under the Controlled Substances Act, specifically those that have a potential for abuse, but less than that of the drugs or other substances in schedules I and II. C-III drugs have a currently accepted medical use in treatment in the United States. The risk of dependence is less than that of the drugs or other substances in schedules I and II but may still lead to moderate or a low physical dependence or high psychological dependence.
Drug abuse is the use of a drug without the advice of a medical professional and for reasons not originally intended, and it can lead to addiction. Drug addiction is a condition characterized by the compulsive use of a substance such as a psychoactive drug despite negative consequences that such use may entail. Drug dependence is a condition that may be physical and/or psychological and occurs when cessation of drug use results in withdrawal symptoms.