Macrolides

Antimicrobial Normal Adult Dose Cost ($)/Day
erythromycin 250-500mg PO qid 0.75 - 1.49
  0.5-1g IV q6h 64.00 - 105.60
azithromycin PO 500mg PO first day then  
  250mg PO daily x 4 days or 1.31
  500mg PO daily 2.61
azithromycin IV 500mg IV daily 19.66
clarithromycin 250-500mg PO bid 0.84 - 3.26
  XL 1000mg PO daily 2.51