Dose of Rifampicin per month for adult multibacillary leprosy
**Core Concept**
The treatment of leprosy, specifically multibacillary leprosy, involves the use of a combination of antibiotics, including rifampicin, to eradicate the causative bacteria, Mycobacterium leprae. The dosage of rifampicin is critical to ensure effective treatment and minimize the development of antibiotic resistance.
**Why the Correct Answer is Right**
Rifampicin is a key component of the World Health Organization's (WHO) recommended multidrug therapy (MDT) regimen for multibacillary leprosy. The recommended dose of rifampicin is 600 mg per month, administered monthly for 12 months. This high dose is necessary to achieve adequate tissue concentrations of the antibiotic and ensure the elimination of the bacteria from the body.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the dose of rifampicin for multibacillary leprosy is much higher than the standard dose used for tuberculosis or other infections.
**Option B:** This option is incorrect because the dose of rifampicin for multibacillary leprosy is not reduced in patients with renal impairment or liver disease.
**Option C:** This option is incorrect because the dose of rifampicin for multibacillary leprosy is not increased in patients with severe leprosy or those with a high bacterial load.
**Clinical Pearl / High-Yield Fact**
It is essential to note that rifampicin can induce liver enzymes, leading to increased metabolism of other medications, including anticoagulants, and potentially reducing their effectiveness.
**Correct Answer:** C. 600 mg.