**Core Concept**
Tourette syndrome is a neurodevelopmental disorder characterized by chronic motor and vocal tics. The pathophysiology involves abnormalities in the cortico-striato-thalamo-cortical (CSTC) circuitry, particularly in the basal ganglia.

**Why the Correct Answer is Right**
The first-line treatment for Tourette syndrome is medication that targets the dopaminergic system, specifically D2 receptors. **Haloperidol**, a typical antipsychotic, is often used due to its high affinity for D2 receptors, which helps reduce tic severity. Haloperidol's mechanism of action involves blocking dopamine release and reducing the excitability of neurons in the basal ganglia, thereby alleviating tics.

**Why Each Wrong Option is Incorrect**
**Option A:** Not a typical antipsychotic, making it less effective for Tourette syndrome.
**Option B:** Not commonly used for tic disorders due to its side effects and lower efficacy.
**Option C:** While it may be used off-label for Tourette syndrome, it's not the first-line treatment.

**Clinical Pearl / High-Yield Fact**
Haloperidol's efficacy in Tourette syndrome is well-established, but its use is limited by potential side effects, such as extrapyramidal symptoms (EPS) and tardive dyskinesia. Close monitoring of patients is essential to minimize these risks.

**Correct Answer: D. Haloperidol**