Here’s the detailed profile for Rifampicin Capsule 300 mg 👇
💊 Rifampicin Capsule 300 mg
📘 Description:
- Rifampicin is a semisynthetic rifamycin antibiotic.
- Acts by inhibiting bacterial DNA-dependent RNA polymerase, blocking RNA synthesis and protein production.
- Highly bactericidal against mycobacteria and a few Gram-positive/Gram-negative organisms.
- A first-line essential drug for tuberculosis (TB) and leprosy (Hansen’s disease).
📄 Prescription / Indications:
- Tuberculosis (TB): cornerstone of first-line regimen (always in combination with other anti-TB drugs).
- Leprosy (MDT regimen): essential component.
- Other mycobacterial infections: e.g., atypical mycobacteria.
- Prophylaxis of meningococcal meningitis.
- Sometimes used in serious staphylococcal infections (only in combination).
🌿 Nature / Drug Class:
- Rifamycin class antibiotic
- Potent antimycobacterial
- Bactericidal
✅ Advantages:
- Highly effective in killing both actively dividing and dormant bacilli.
- Prevents resistance development when used in combination.
- Key component of short-course chemotherapy in TB.
- Available in fixed-dose combinations with isoniazid, pyrazinamide, ethambutol → improves compliance.
- Single supervised monthly dose in MDT for leprosy.
⚠️ Precautions:
Contraindications:
- Hypersensitivity to rifampicin or related rifamycins
- Severe liver dysfunction
Caution in:
- Patients with pre-existing liver disease, alcohol use, or on hepatotoxic drugs
- Patients on multiple medications – potent enzyme inducer (CYP450) → lowers effect of oral contraceptives, warfarin, some antivirals, antifungals, etc.
Adverse effects:
- GI upset (nausea, vomiting, abdominal pain)
- Hepatotoxicity – monitor liver enzymes
- Orange-red discoloration of urine, sweat, saliva, tears, contact lenses
- Flu-like syndrome (especially with intermittent dosing)
- Rare: thrombocytopenia, hemolysis, renal impairment
💊 Dosage (Adults):
- Tuberculosis: 10 mg/kg (usually 450–600 mg once daily)
- 300 mg capsules used alone or in combination to reach exact weight-based dosing.
- Leprosy (MDT): 600 mg once monthly (supervised dose)
- Meningococcal prophylaxis: 600 mg every 12 hours for 2 days
👉 The 300 mg capsule is widely used in daily TB therapy and as part of fixed-dose combinations.
📦 Common Packaging:
- Capsules 300 mg (often packed in strips of 10 or 30)
- Also available in blister packs for MDT (leprosy) along with dapsone and clofazimine
- Supplied as single drug or fixed-dose combination (FDC) tablets with isoniazid, pyrazinamide, ethambutol
❄️ Storage Conditions:
- Store at room temperature (<25°C)
- Protect from light and moisture
- Keep tightly closed and out of reach of children