Meningitis: Adults 18-50 years AND Immunocompetent

Empiric Therapy Dose Duration
Ceftriaxone 2g IV q12h See Duration
+    
Vancomycin 25-30mg/kg IV once then 15mg/kg IV q8-12h  

Cephalosporin allergy

Empiric Therapy Dose Duration
Meropenem 2g IV q8h See Duration
+    
Vancomycin 25-30mg/kg IV once then 15mg/kg IV q8-12h  

Carbapenem allergy

Empiric Therapy Dose Duration
[TMP/SMX 15-20mg TMP/kg/day IV div q6-8h See Duration
or    
Ciprofloxacin] 400mg IV q12h  
+    
Vancomycin 25-30mg/kg IV once then 15mg/kg IV q8-12h