Pharmacology 7th Edition by Henry Hitner,Barbara Nagle

Exercise 21

Use your critical-thinking skills to answer the question.
Assume you work a drug abuse hotline. What aspect of drug abuse does each of the following callers exhibit
a. Caller A says he needs help quitting cocaine. His main reason for wanting to quit is that he can no longer afford to buy the amount of cocaine he needs to get high. He says it seems that he uses more every day, and he still doesn't get as high as he did when he first started using the drug.
b. Caller B says he thinks he needs to get medical help with his cocaine problem. He's been using cocaine for months now, and he needs larger and larger doses just to keep from feeling sick and strung out. He can't imagine going without the cocaine, but he knows things can't go on this way, either.