| Pneumonia Duration of treatment:  Community acquired-mild: 7-10days. //  Gram negative (usually nosocomial): 3 to 6 weeks. // Staphylococcal: 3 to 4 weeks //   Legionella, mycoplasma, chlamydia: 14 to 21 days. // Lung abscess: 4 to 6 weeks.
 | Possible therapeutic alternatives | 
| Community-acquired Pneumonia (CAP):   (outpatient therapy)   Adult patient | 
| Pneumonia: Community acquired. (outpatient therapy) Adult patient | Common pathogens | 
| OUTPATIENT |  
| No co-morbidities: |  
| Azithromycin 500 mg x1, then 250 mg once daily OR   azithromycin 2 gm (XR) x 1 dose   (OR) |  
| Clarithromycin 500mg orally twice daily or 1gram (XR) orally once daily x 7 days   (OR) |  
| Doxycycline 100mg orally twice daily |  
| Co-morbidities present: |  
| Levofloxacin 750 mg once daily x 5 days (OR) |  
| moxifloxacin 400mg po qd x 7-10days (OR) |  
| Azithromycin 500 mg x1, then 250 mg once daily PLUS  [ Augmentin XR* 1000/62.5 mg 2 tablets orally twice daily or  Cefdinir 300 mg orally twice daily or Cefpodoxime 200 mg orally twice daily or Cefprozil 500 mg orally twice daily] x  7 days
 *AUGMENTIN XR is contraindicated in patients with a creatinine clearance of < 30 mL/min. and in hemodialysis patients |  | 
| Community acquired PNEUMONIA -  Adult (any age) | Common pathogens | 
| Hospitalized patient: |  
| Azithromycin 500mg  IV once daily PLUS Ceftriaxone 1 gram q24h   (OR) Azithromycin 500mg  IV once daily PLUSErtapenem 1 gram q24h   (OR)
 Monotherapy:Levofloxacin 750 mg IV/PO once daily (OR)
 Moxifloxacin 400mg IV qd.
 |  
| ICU patient (CAP): |  
| [Ceftriaxone 1-2 grams IV q24h  OR Ampicillin-sulbactam (Unasyn) 1.5-3.0 grams ivpb q6h]
 PLUS[Azithromycin 500mg  IV once daily OR Levofloxacin 750 mg IV/PO once daily (OR)
 Moxifloxacin 400mg IV qd.]
 PLUSVancomycin - (patient-specific regimen - trough goal 15-20 mcg/ml)
 |  | 
| Hospital-acquired PNEUMONIA (HAP) | 
| Hospital-acquired PNEUMONIA (HAP) (nosocomial) | Common pathogens | 
| Multi-drug resistance unlikely |  
| Ceftriaxone 1-2 grams IV q24h  OR Ampicillin-sulbactam (Unasyn) 3.0 grams ivpb q6h  OR
 Levofloxacin 750 mg IV/PO once daily
 |  
| Multi-drug resistance LIKELY |  
| Piperacillin-tazobactam 3.375g ivpb q6h OR Cefepime 2 grams IV every 12 hours OR
 Meropenem 1 gm IV q8h
 PLUS (If MRSA suspected)Vancomycin - (patient-specific regimen - trough goal 15-20 mcg/ml)
 |  | 
| Aspiration pneumonia | 
|  | Common pathogens |  | 
| Hospital acquired: (Cover most common pathogens + possibility of aspiration) | Common pathogens |  | 
| Ventilator-associated pneumonia (VAP) | 
| (Mild to moderate infection AND multi-drug resistance unlikely): | Common pathogens | 
| Ceftriaxone 1-2 grams IV q24h  OR Ampicillin-sulbactam (Unasyn) 3.0 grams ivpb q6h  OR
 Levofloxacin 750 mg IV/PO once daily OR
 Ertapenem 1 gm IV q24h
 PLUS (If MRSA suspected)Vancomycin - (patient-specific regimen - trough goal 15-20 mcg/ml)
 |  | 
| (Severe infection OR multi-drug resistance LIKELY): | Common pathogens | 
| Cefepime 2 grams IV every 12 hours OR Piperacillin-tazobactam 4.5 grams IV Q6H OR
 Meropenem 1 gm IV q8h
 PLUSVancomycin - (patient-specific regimen - trough goal 15-20 mcg/ml)
 PLUSCiprofloxacin 400mg IV q8h  OR
 Levofloxacin 750 mg IV/PO once daily OR
 Aminoglycoside (Tobra) - patient-specific regimen.
 |  |