问题
单项选择题
Which of the following drugs may be abused because of tolerance and physiologic dependence（）
A. Lithium (Lithobid) and divalproex (Depakote).
B. Verapamil (Calan) and chlorpromazine (Thorazine).
C. Alprazolam (Xanax) and phenobarbital (Luminal).
D. Clozapine (Clozaril) and amitriptyline (Elavil).
答案
参考答案：C
解析：
Both benzodiazepines, such as alprazolam, and barbiturates, such as phenobarbital, are addictive, controlled substances. All the other drugs listed aren’t addictive substances.