Rifampin (Rifadin); Tuberculostatic; Cap: 150, 300 mg 
 Inj: 600 mg; 
Tuberculosis: 
 10-20 mg/kg/day PO/IV q12-24h 
 Adults: 10 mg/kg/day PO/IV q12-24h (max 600 mg/day).  
Twice-Weekly Oral Therapy:10-20 mg/kg/dose (max 600 mg) twice weekly under direct supervision. 
 Adults: 10 mg/kg (max 600 mg) twice weekly. 
 Twice-weekly therapy should follow 1-2 months of daily treatment.  
H influenza prophylaxis: 
 Neonates <1 month: 10 mg/kg/day PO q24h for 4 days 
 Infants and children: 20 mg/kg/day PO q24h for 4 days (not to exceed 600 mg/dose)  
Meningococcal Prophylaxis: 
 Neonates <1 mos: 10 mg/kg/day PO bid for 2 days