Antimicrobials
Clarithromycin

Clarithromycin

Medium
Excellent
$1/day

General Information

CAP, Pertussis, URTI, H. pylori, and mycobacterial infections

Monitor QTc in patients with increased risk

  • GI upset, diarrhea
  • Rash
  • Prolongation of QTc interval

Substrate of CYP3A4.

Multiple CYP450 interactions possible - consult a pharmacist for more detail. May increase digoxin, carbamazepine level. Use caution with QTc prolonging medications.

Antimicrobial class: Macrolide

Average serum half life: Adult: Clarithromycin: 3-7 hours 14-OH-clarithromycin (active metabolite): 5-9 hours

Route of Elimination: Urine (20-40% as unchanged drug, additional 10%-15% as active metabolite); feces (29% to 40% mostly as metabolites)