Drug used for cessation of smoking –
**Core Concept**
The question is testing the pharmacological principle of smoking cessation, specifically the use of nicotine replacement therapy (NRT) or non-nicotine prescription medications to aid in quitting smoking.
**Why the Correct Answer is Right**
The correct answer is bupropion, an antidepressant medication that also has efficacy in smoking cessation. Bupropion works by inhibiting the reuptake of dopamine, norepinephrine, and serotonin, leading to increased levels of these neurotransmitters in the brain. This increase in neurotransmitters helps to reduce the cravings and withdrawal symptoms associated with smoking cessation. Additionally, bupropion has been shown to reduce the pleasurable effects of smoking, making it easier for individuals to quit.
**Why Each Wrong Option is Incorrect**
**Option A:** Nortriptyline is a tricyclic antidepressant that is not commonly used for smoking cessation.
**Option C:** Varenicline is a partial agonist of the nicotinic acetylcholine receptor and is used for smoking cessation, but it is not the correct answer in this case.
**Clinical Pearl / High-Yield Fact**
Bupropion is often prescribed in combination with counseling and support to increase the chances of successful smoking cessation.
**Correct Answer:** B. Bupropion