Fastest acting drug in leprosy is –
**Core Concept**
Leprosy, also known as Hansen's disease, is a chronic bacterial infection caused by Mycobacterium leprae. The treatment involves a combination of antibiotics to prevent the development of resistance and to achieve a cure. In the treatment of leprosy, the choice of antibiotics and their dosing regimens are crucial in determining the effectiveness of the treatment.
**Why the Correct Answer is Right**
The fastest-acting drug in leprosy is Rifampicin, a bactericidal antibiotic that works by inhibiting RNA synthesis in M. leprae. Rifampicin is highly effective against the bacteria and has a rapid onset of action, making it an essential component of leprosy treatment. Rifampicin's mechanism of action involves binding to the beta-subunit of RNA polymerase, which is essential for the transcription of DNA into RNA.
**Why Each Wrong Option is Incorrect**
**Option A:**
* Not a recognized drug for the treatment of leprosy.
**Option B:**
* While Clofazimine is an important drug in leprosy treatment, it is not the fastest-acting drug.
**Option C:** Dapsone is an essential drug in leprosy treatment, but it is not the fastest-acting drug.
**Clinical Pearl / High-Yield Fact**
Rifampicin is also used in the treatment of tuberculosis and is known for its potent bactericidal activity against M. tuberculosis. It is essential to note that Rifampicin can cause liver enzyme elevations and can interact with other medications, such as warfarin and oral contraceptives.
**Correct Answer: C. Dapsone**