**Question:** Side effect of bupropion is

A. Drowsiness
B. Dizziness
C. Headache
D. Nausea

**Core Concept:**
Bupropion is an antidepressant drug primarily used for the treatment of major depressive disorder and seasonal affective disorder. It works by inhibiting the reuptake of dopamine, norepinephrine, and to a lesser extent, serotonin.

**Why the Correct Answer is Right:**
Bupropion can cause a range of side effects due to its effect on neurotransmitter reuptake. The correct answer, "Dizziness", is a neuropsychiatric side effect. Dopaminergic and noradrenergic neurotransmission are disrupted by bupropion, which can lead to dizziness.

**Why Each Wrong Option is Incorrect:**
A. Drowsiness (Option A) is not typically a side effect of bupropion. It is more commonly associated with selective serotonin reuptake inhibitors (SSRIs) and selective norepinephrine reuptake inhibitors (SNRIs).
B. Dizziness (Option B) is a correct answer and is more closely related to the neuropsychiatric side effects of bupropion.
C. Headache (Option C) is a less common side effect of bupropion compared to other antidepressants like SSRIs and tricyclic antidepressants.
D. Nausea (Option D) is a relatively rare side effect of bupropion.

**Clinical Pearl:**
While bupropion is generally well-tolerated, it is essential to be aware of the potential side effects, particularly neuropsychiatric ones. These side effects are usually mild and transient, and the benefits of using bupropion for treating depression and smoking cessation often outweigh the risks. However, it is crucial to monitor patients for these side effects during treatment and adjust the medication or dosage accordingly.

**Correct Answer:** Dizziness (Option B)