**Question:** Jarisch-Herxheimer reaction is treated by administering

A. antibiotics
B. antihistamines
C. corticosteroids
D. anti-TB drugs

**Core Concept:**

The Jarisch-Herxheimer reaction is a temporary worsening of symptoms that can occur in patients with certain infections, particularly those caused by spirochetes (e.g., syphilis, Lyme disease). This reaction is a result of a sudden release of endotoxins and bacterial products into the circulation, leading to increased inflammation and tissue damage.

**Why the Correct Answer is Right:**

Corticosteroids (Option C) are administered to suppress the inflammatory response and reduce the release of pro-inflammatory cytokines, which are responsible for the worsening of symptoms during the Jarisch-Herxheimer reaction.

**Why Each Wrong Option is Incorrect:**

1. Antibiotics (Option A) are used to treat the underlying infection, but they do not address the inflammatory response that leads to the Jarisch-Herxheimer reaction.
2. Anti-TB drugs (Option D) are typically used to treat Mycobacterium tuberculosis infections, not spirochetes. If the correct answer is C (corticosteroids), then using D (anti-TB drugs) would be incorrect as they are not suitable for this condition.
3. Antihistamines (Option B) are primarily used in allergic reactions to block histamine, which is not relevant in treating the Jarisch-Herxheimer reaction.

**Clinical Pearl:**

In patients experiencing Jarisch-Herxheimer reaction, it is essential to recognize this phenomenon and administer corticosteroids to alleviate the worsening symptoms. This treatment choice helps to manage the inflammatory response and minimize the adverse effects associated with the reaction. Remember, this reaction is a temporary response to the release of endotoxins and bacterial products during antibiotic therapy for spirochetal infections.