A nurse in a community clinic is caring for a client who requests assistance with smoking cessation. The nurse should expect a prescription for which of the following medications?

A. Chlordiazepoxide: Chlordiazepoxide is a benzodiazepine primarily used to manage anxiety and alcohol withdrawal. It does not have any pharmacologic effect on nicotine cravings or withdrawal symptoms and is not indicated for smoking cessation. B. Naltrexone: Naltrexone is an opioid receptor antagonist used mainly for alcohol and opioid dependence. It does not target the neurochemical pathways involved in nicotine addiction and is therefore not prescribed for smoking cessation. C. Bupropion: Bupropion is an atypical antidepressant that also functions as a smoking cessation aid by reducing nicotine cravings and withdrawal symptoms. It acts on dopaminergic and noradrenergic pathways, making it an effective first-line pharmacologic option for clients seeking to quit smoking. D. Clonidine: Clonidine is an antihypertensive medication that can be used off-label to reduce withdrawal symptoms in opioid or nicotine dependence. However, it is not a first-line therapy for smoking cessation and is generally reserved for clients who cannot tolerate other medications.