## Core Concept
The question tests the knowledge of managing side effects associated with niacin (nicotinic acid), specifically flushing. Niacin is used to treat hyperlipidemia and is known for causing flushing as a side effect.

## Why the Correct Answer is Right
The correct answer, **Laropiprant**, is a drug specifically developed to mitigate the flushing associated with niacin. It works by inhibiting the prostaglandin D2 receptor 1 (DP1), which plays a role in the flushing response. By blocking this receptor, laropiprant reduces the incidence and severity of flushing in patients taking niacin.

## Why Each Wrong Option is Incorrect
* **Option A:** This option is incorrect because it is not specified, but commonly, drugs like aspirin can temporarily help with flushing but are not specifically used for this purpose long-term.
* **Option B:** This option is incorrect as it is not specified, but typically, other antihistamines or NSAIDs might provide temporary relief but are not targeted therapy for niacin-induced flushing.
* **Option C:** This option is incorrect because, similar to option B, it lacks specificity, but generally, these might not directly address the prostaglandin pathway involved in niacin-induced flushing.

## Clinical Pearl / High-Yield Fact
A key point to remember is that laropiprant was specifically approved by the FDA in combination with niacin (as Niaspan) to reduce the flushing associated with niacin. This combination is an example of how pharmacological interventions can be tailored to mitigate side effects of medications.

## Correct Answer Line
**Correct Answer: D. Laropiprant.**