A client is taking hydrocodone (Vicodin) for chronic back pain. The client has required an increase in the dose and asks whether this means he is addicted to Vicodin. The nurse should base her reply on the knowledge that:

B the client is preoccupied with getting the drug and is experiencing loss of control, indicating drug dependence. A the client's body has developed tolerance, requiring more drug to produce the same effect. C addiction is the term used to describe physical dependence with withdrawal symptoms and tolerance. D the client has a dual diagnosis of substance abuse and chronic back pain.