The drug of choice for treatment of Neurosyphilis is:
**Core Concept**
The question is testing the management of neurosyphilis, a complication of syphilis that affects the central nervous system. The treatment of neurosyphilis requires a specific antisyphilitic agent that can cross the blood-brain barrier.
**Why the Correct Answer is Right**
The correct answer is **Ceftriaxone**, a third-generation cephalosporin antibiotic. Ceftriaxone is preferred for the treatment of neurosyphilis because it has excellent penetration into the cerebrospinal fluid (CSF), allowing for effective treatment of the infection. This is crucial in preventing further damage to the central nervous system.
**Why Each Wrong Option is Incorrect**
**Option A:** Penicillin G is the traditional treatment for syphilis, but it has limited ability to cross the blood-brain barrier, making it less effective for neurosyphilis.
**Option B:** Doxycycline is an alternative treatment for syphilis, but it is not suitable for neurosyphilis due to its poor penetration into the CSF.
**Option D:** Azithromycin is a macrolide antibiotic that is not effective against Treponema pallidum, the bacterium that causes syphilis.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the Jarisch-Herxheimer reaction, a reaction to syphilis treatment, can occur within 24 hours of treatment initiation, characterized by fever, headache, and myalgias.
**Correct Answer: C. Ceftriaxone**